Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
A Horticultural Implement and a Garden Tool for Removal of Weed in a Tile System
Document Type and Number:
WIPO Patent Application WO/2019/080979
Kind Code:
A1
Abstract:
An object of the invention is obtained by a horticultural implement (10) for removal of weed in a tile system. The horticultural implement (10) comprises a first blade (A) and a second blade (B). Each blade comprises a longitudinal flat structure having a free end part (12A, 12B) and a connection part (14A, 14B). The horticultural implement further comprises an intermediate body (100) holding the first and second connection parts part (14A, 14B) at a first and second acute angle (52A, 52B) relative to an axis (50). Thereby a triangular shape (60) is formed, where the free end parts form a tip (16) having a tip angle (18). Further disclosed is a horticultural implement (10) obtainable by a process comprising providing (410) a flat, longitudinal metal piece (20) defining an axis (50), pre-bending (425) a middle part of the metal piece, thereby creating a curved section, bending (420) the metal piece relative to the axis at two bending points (22A, 22B) into a triangular shape (60), thereby dividing the metal piece (20) into an intermediate body (100), a first and a second free end part (12A, 12B) intersecting the axis (50) at a first and a second acute angle (52A, 52B), and hardening (430) the metal piece (20), an intermediate body (100) comprising a first and second flange (102A, 102B) comprising a longitudinal structure, which intersects an axis (50) at a first and second acute angle (52A, 52B), respectively, thereby forming a triangular shape (60), a connection piece (110) interconnecting the first and the second flange (102A, 102B), a first and a second clamping unit (120A, 120B) positioned at the respective flanges (102A, 102B), each camping unit (120A, 120B) comprising a longitudinal indent (122A, 122B) parallel to the respective flange (102 A, 102B), thereby forming a blade guide (140A, 140B) adapted for holding and sliding a blade (A, B), the respective clamping units (120A, 120B) and the respective flanges (102A, 102B) comprising at least a pair of complementary recesses (130) positioned distal to the connection piece (110) for a fastener (70), and a garden tool (300) for weed removal in a tile system, the garden tool (300) comprising a shaft (200) comprising a shaft head (210) and a shaft hole (220), a horticultural implement (10), wherein the intermediate body (100) further comprises a body hole (120) complementary to the shaft hole (220) such that the holes (120, 220) form a fastener slot for insertion of a fastener (70).

More Like This:
Inventors:
JENSEN, Martin (Skovglimt 5, Stensballe, 8700 Horsens, 8700, DK)
Application Number:
DK2018/050266
Publication Date:
May 02, 2019
Filing Date:
October 23, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FIRMA MARTIN A/S (Skovglimt 5, 8700 Horsens, 8700, DK)
International Classes:
A01B1/10; E01H11/00
Foreign References:
US20080128146A12008-06-05
US1018073A1912-02-20
US3173495A1965-03-16
US5046254A1991-09-10
US2936032A1960-05-10
US1650463A1927-11-22
US2969593A1961-01-31
Attorney, Agent or Firm:
PATRADE A/S (Ceresbyen 75, 8000 Aarhus C, 8000, DK)
Download PDF:
Claims:
CLAIMS

1. A horticultural implement (10) for weed removal in a tile system, the horticultural implement (10) comprising:

- a first blade (A) and second blade (B), each blade (A, B) comprising a longitudinal flat structure having a free end part (12A, 12B) and a connection part (14A, 14B);

- an intermediate body (100) holding the first and second connection parts (14A, 14B) at a first and second acute angle (52A, 52B) relative to an axis (50), thereby forming a triangular shape (60) where the free end parts (12A, 12B) form a tip (16) having a tip angle (18).

2. The horticultural implement (10) according to claim 1, wherein at least one of the blades (A, B) is flexible.

3. The horticultural implement (10) according to claim 2, wherein the horticultural implement (10) defines along the axis (50) a blade distance (30) between the first blade (A) and second blade (B), which blade distance (30) along with the first and second acute angle (52A, 52B) defines a triangle (62) having a first and second triangle side (64A, 64B), wherein each free end part (12 A, 12B) is longer than the corresponding triangle side (64A, 64B).

4. The horticultural implement (10) according to one or more of claims 1-3, wherein the intermediate body (100), the first blade (A) and the second blade (B) are formed as one body, where the first connection part (14A) is a first bending point (22A) bent relative to the axis (50) in the first acute angle (52A) forming the first blade (A), and the second connection part (14B) is a second bending point (22B) bent relative to the axis (50) in the second acute angle (52 A) forming the second blade (B).

5. The horticultural implement (10) according to claim 4, wherein the intermediate body (100) comprises a curved section (160) between the bending points (22A, 22B), the curved section (160) extending towards the tip (16), and a straightener (150) comprising a rectangular straightener body complementary to the intermediate body (100), the straightener (150) being adapted to force the intermediate body (100) towards a shaft (200), thereby straightening the intermediate body (100) and forcing the free end parts (12A, 12B) towards each other.

6. The horticultural implement (10) according to one or more of claims 1-3, wherein the intermediate body (100) comprises:

- a first and second flange (102A, 102B) comprising a longitudinal structure, which, respectively, intersects the axis (50) with the first and second acute angle (52A, 52B); - a connection piece (110) interconnecting the first and the second flange (102A, 102B);

- a first and a second clamping unit (120 A, 120B) positioned at the respective flanges (102A, 102B), each clamping unit (120A, 120B) comprising a longitudinal indent (122A, 122B) parallel to the respective flange (102A, 102B), thereby forming a blade guide (140 A, 140B) adapted for holding and sliding a blade (A, B);

- the respective clamping units (120A, 120B) and the respective flanges (102A, 102B) comprising at least a pair of complementary recesses (130) positioned distal to the connection piece (110) for a fastener (70). 7. The horticultural implement (10) according to one or more of claims 1-6, wherein the horticultural implement (10) is connected to a shaft (200).

8. A horticultural implement (10) obtained by the process (400):

- providing (410) a flat, longitudinal metal piece (20) defining an axis (50);

- pre-bending (425) a middle part of the metal piece (20), thereby creating a curved section (160);

- bending (420) the metal piece (20) relative to the axis (50) at two bending points (22A, 22B) into a triangular shape (60), thereby dividing the metal piece (20) into an intermediate body (10), a first and a second free end part (12A, 12B) intersecting the axis (50) at a first and a second acute angle (52A, 52B);

- hardening (430) the metal piece (100).

9. An intermediate body (100) comprising:

- a first and second flange (102A, 102B) comprising a longitudinal structure, which intersects an axis (50) at a first and second acute angle (52A, 52B), respectively, thereby forming a triangular shape (60);

- a connection piece (110) interconnecting the first and the second flange (102A, 102B); - a first and a second clamping unit (120 A, 120B) positioned at the respective flanges (102A, 102B), each clamping unit (120A, 120B) comprising a longitudinal indent (122A, 122B) parallel to the respective flange (102A, 102B), thereby forming a blade guide (140 A, 140B) adapted for holding and sliding a blade (A, B);

- the respective clamping units (120A, 120B) and the respective flanges (102A, 102B) comprising at least a pair of complementary recesses (130) positioned distal to the connection piece (110) for a fastener (70).

10. A garden tool (300) for weed removal in a tile system, the garden tool (300) comprising:

- a shaft (200) comprising a shaft head (210) and a shaft hole (220);

- a horticultural implement (10) according to one or more of claims 1-8, wherein the intermediate body (100) further comprises a body hole (120) complementary to the shaft hole (220) such that the holes (120, 220) form a fastener slot for insertion of a fastener (70).

Description:
A Horticultural Implement and a Garden Tool for Removal of Weed in a Tile System

Field of the Invention

The present invention relates to a horticultural implement and a garden tool for removal of weed in grooves formed by tiles in a tile system.

Background of the Invention

Every tile system defines grooves in a pattern defined by the interspace between the tiles. The grooves are made of earth and therefore it is unavoidable that weed will grow in these grooves.

The weed can be controlled by using an herbicide such as glyphosate, but the herbicide affects the environment negatively. The other option is manual removal of the weed. At present there are several garden tools, which can be used for removal of the weed in grooves.

US20100018730 discloses a multi-tool optimized scuffle hoe that maximizes the efforts of the user in forward and backward motion, and that provides the functions of multiple garden tools, all-in-one. The tool comprises a V-shaped head portion having an open interior with blades that are sharpened on both inside and outside, the ends of which blades curve upward toward each other and attach to a handle portion.

The multi-tool can be used to control the weed extending from the grooves as the de- sign of the multi-tool (see Fig. 2) is made for pulling and pushing the tool parallel to the surface of the ground. Thus, the multi-tool is not intended to be used in the grooves.

US5350021 discloses an implement for cleaning spaces between adjacent slabs of paving materials, the implement including a pilot member proportioned to fit into the spaces between the adjacent slabs of paving materials, a pair of flange members forming a V-shape having an apex, the pilot member and the pair of flange members being joined such that the pilot member extends away from the exterior of the apex of the V- shape.

The crevice implement is rather long, which makes it inappropriate for curved groove patterns or for working in corners and it cannot be used on grooves having different widths. Any tile system will have grooves with a varying width.

Furthermore, the pilot member removes a significantly amount of earth between the tiles, which is an unwanted effect as this can result in the tiles moving. Thus, the user would often need to apply sand to the tile system.

Furthermore, the crevice implement uses a lot of material in order to make it sturdier, so that it can withstand the wear and tear. The material increases the cost of the crevice implement.

Thus, there is a need for an inexpensive, more versatile horticultural implement capable of removing weed from all kinds of groove patterns.

Object of the Invention

It is an object of the invention to provide a horticultural implement and a garden tool, which is inexpensive to produce, easy to handle and can be used on grooves formed by any tile system.

Description of the Invention

An object of the invention is obtained by a horticultural implement for removal of weed in a tile system. The horticultural implement comprises a first blade and second blade. Each blade comprises a longitudinal flat structure having a free end part and a connection part. The horticultural implement further comprises an intermediate body holding the first and second connection parts at a first and second acute angle relative to an axis. Thereby a triangular shape is formed, where the free end parts form a tip having a tip angle.

The intended use of the horticultural implement is to remove weed in a tile system. The weed is removed by placing the tip into a groove formed by two tiles and then pulling the horticultural implement along the groove. The blades will then cut the weed along groove.

The triangular shape is hollow, which enables earth in the groove to move through the horticultural implement. Thereby the earth is not pulled along the groove.

In an embodiment the blades are made of a metal capable of experiencing the forces during weed removal without deforming. The skilled person would know which metal to use. In an embodiment the blades are made of steel, which is capable of experiencing the forces during weed removal without deforming.

In an embodiment the blades are made of a hardened metal to further increase the strength of the blades.

In an embodiment each blade are cut from a metal band such as it will lower the production cost. This also makes it inexpensive to replace the blades or the blades and the intermediate body depending on the design of the horticultural implement. The blades may be sharp. However, test have shown that the blades do not need to be sharp, when used for the first time, nor do they need to be manually sharpened at a later stage. Because the act of pulling the horticultural implement along the groove creates friction between the tiles and the blades, which sharpens the blades. Thus, the horticultural element is self-sharpening. This effect increases the usability and the lifetime of the horticultural element.

The intermediate body is to be interpreted broadly as it may be any element, which can hold the first and second connection parts at the first and second acute angle relative to the axis as this would form the triangular shape, where the free end parts form a tip with a tip angle.

In an embodiment the intermediate body is a shaft with a shaft head with two face sides which are angled, such that the triangular shape is formed when the blades are attached to the shaft. In another embodiment the intermediate body is a single metal piece to which the blades are attached, thereby forming the triangular shape.

In an embodiment the first and second acute angle may be 70 degrees and the tip angle is then 40 degrees as this has been found to be a suitable tip angle.

The angles may be different than mentioned above.

In an aspect of the invention at least one of the blades may be flexible.

The flexibility enables the horticultural to be used on different tile systems as it may adapt to the different groove widths.

Furthermore, the blades can adapt to the tile system as the width of the grooves constantly changes in any tile system.

The flexibility of at least one of the blades is an enabler for several embodiments, which utilizes the flexibility to make a better horticultural implement.

These embodiments will be discussed throughout the description and the detailed description.

In an embodiment each blade may have a thickness in the range of 0.4-2 mm, 0.5-1.0 mm, 0.6-0.8 mm or 0.7 mm. The thickness of the blades is a trade-off between strength of the blades and the necessary flexibility of the blades.

Tests have shown that a blade made of hardened metal having a thickness of 0.7 mm has the necessary strength and flexibility.

The skilled person may through ordinary work find other suitable materials having other optimum thicknesses.

In an aspect of the invention the horticultural implement may define along the axis a blade distance between the first blade and second blade, which blade distance along with the first and second acute angle defines a triangle. The triangle has a first and second triangle side.

In an embodiment each free end part may be longer than the corresponding triangle side.

The effect being that this forces the free end parts together, thereby creating a restoring force. The restoring force ensures that the free end parts are held together such that the tip is always present even though a large external force is exerted on the horticul- tural implement.

For a set of blades it is possible to visibly inspect, whether there is a large restoring force present as the restoring force causes the free end parts to curve. Thereby the summation of the first acute angle, the second acute angle and tip angle is less than 180 degrees.

The curvature of the free end part depends on both the flexibility of the blades and on the size of the restoring force. The skilled person would through trials be able to get a feel of the restoring force. Thereby the skilled person is able to adjust the restoring force to the necessary level.

The usability and lifetime of the horticultural implement is increased significantly when the self-sharpening effect is combined with the restoring force. Because the sharpening of the blades removes material and the free end parts will over time short- en, however the restoring force will ensure that the free end parts still form a tip.

In an aspect of the invention the intermediate body, the first blade and the second blade may be formed as one body. The first connection part may be a first bending point bent relative to the axis in the first acute angle forming the first blade. The sec- ond connection part is a second bending point bent relative to the axis in a second acute angle forming the second blade. The effect of having the horticultural implement as a monolith is that it is inexpensive to produce. Furthermore, it is easier to attach the horticultural implement to a shaft because only one element has to be attached. The attachment may be done by a clamp.

In an aspect of the invention the intermediate body may comprise a curved section between the bending points. The curved section extends towards the tip. The curved section makes the intermediate body act as a spring when straightened.

The intermediate body may further comprise a straightener, which may comprise a rectangular straightener body complementary to the intermediate body. The straightener may be adapted to force the intermediate body towards a shaft, thereby straightening the intermediate body and forcing the free end parts towards each other.

Tests have shown that the straightening of the curved section by the straightener cre- ates a huge restoring force, which makes the free end parts curve. Thus, the summation of the first acute angle, second acute angle and the tip angle is less than 180 degrees.

In an embodiment the horticultural implement is made of hardened metal, which will increase the lifetime and the restoring force. In this case the summation of the first acute angle, second acute angle and the tip angle will only be slightly less than 180 degrees due to the increase strength of the horticultural implement.

In an embodiment each free end part may also be curved, such that when the interme- diate body is straightened each free end part is straightened when forced together with the other free end part. This will further increase the restoring force. In this case the summation of the first acute angle, second acute angle and the tip angle will be 180 degrees. In an aspect of the invention the intermediate body may further comprises:

- A first and second flange. Each flange may comprise a longitudinal structure, which intersects the axis with the first and second acute angle, respectively;

- A connection piece interconnecting the first and second flange;

- A first and a second clamping unit positioned at the respective flanges. Each clamping unit comprises a longitudinal indent parallel to the respective flange, thereby forming a blade guide adapted for holding and sliding a blade; and

- The respective clamping units and the respective flanges may comprise at least a pair of complementary recesses positioned distal to the connection piece for a fastener.

The intermediate body described above enables the horticultural implement to use of- the-shelf blades as the blades can be inserted and removed in an easy manner. Furthermore, the blades can be slid forward as they are worn down by the friction with the tiles.

Furthermore, this enables the skilled person to extent the free end part to a length longer than the sides of a triangle defined by the first acute angle, the second acute angle and the blade distance. This will result in a large restoring force. The restoring force ensures that the blades form a tip.

In an embodiment the clamping unit has a projection for further control of the blades. The projection is typically positioned distal to the indent in order to give the maximum control. The blades can be adapted to the projection by having a series of blade recesses along part of the longitudinal structure of the blade.

In an embodiment the projection may be formed by a recess and a fastener extending through the recess. In an embodiment the connection piece may have a connection piece notch facing the tip, which together with the hollow triangle creates more space for the earth and weed to move through, when being cut. In an embodiment the connection piece has a body hole complementary to a fastener for fastening the intermediate body to a shaft.

In an aspect of the invention the horticultural implement is connected to a shaft.

In an embodiment a straightener is used to attach the horticultural implement to a shaft. This may be done by the straightener, intermediate body and the shaft having complementary holes forming a fastener hole for insertion of a fastener. The fastener hole may have a threaded part.

This may be done by the straightener, intermediate body having complementary holes for a screw, such that a screw may be inserted into the holes followed by being screwed into the shaft. In an embodiment the intermediate body may have a curved section curving towards the tip. The curved section may be straightened by a straightener, when being attached to the shaft. The horticultural implement and the straightener may be attached to the shaft by any attaching means, which is capable of withstanding the forces created when in intended use.

In another embodiment the intermediate body comprises a body hole for the insertion of a fastener, which may then be fastened to a shaft.

The horticultural implement may be angled relative to the longitudinal part of the shaft as to ensure the best work position.

The shaft may have any suitable length such as a long shaft for working will standing straight or a short shaft for precision work. An object of the invention is obtained by a horticultural implement obtained by the process;

- providing a flat, longitudinal metal piece defining an axis;

- pre-bending a middle part of the metal piece, thereby creating a curved section; - bending the metal piece relative to the axis at two bending points into a triangular shape, thereby dividing the metal piece into an intermediate body, a first and a second free end part intersecting the axis at a first and a second acute angle;

- hardening the metal piece.

The pre-bending of the metal piece causes the horticultural implement to form triangular shape, where the intermediate body has a curved section facing towards the tip.

The hardening step is done last as tests showed that the hardening makes the curved section of the intermediate body into, essentially, a spring.

Furthermore, the hardening makes the free end parts stronger.

The intermediate body may then be attached to a shaft. The attachment to the shaft is done in a way that will straighten the curved section of the intermediate body. The straightening causes a restoring force between the free end parts as they are forced together by the intrinsic properties of the horticultural implement. The restoring force ensures that the free end parts form a tip. The straightening may be done by a straightener forcing the curved section up against the shaft.

Tests have shown that the horticultural implement made by the process will still form a tip even if the free end parts are shortened significantly.

The horticultural implement will when in intended use be shortened due to friction with the tiles in the tile system. Thus, the horticultural implement made by the process has an increase lifetime compared to another horticultural implement made by a different process.

In an embodiment of the process the flat metal piece may be 170 mm long, 0.7 mm thick and 12 mm wide. The horticultural implement formed by this metal piece will have free end parts with a length of -60 mm. Tests have shown that the free end parts may be shortened by up to 20-30 mm while still maintaining a tip. The flat metal piece may have completely different dimensions than mentioned above.

In another embodiment the width may be 15 mm wide as this will increase the strength of the horticultural implement.

The process may comprise another pre-bending of the metal piece step, where the to- be free end parts of the metal piece is bent to create a first and second free end curved section. When the intermediate body is straightened the free end parts will be forced together, thereby straightened straightening the free end parts. This will further increase the restoring force as the free end parts will act as springs.

An object of the invention is obtained by an intermediate body, which may comprise;

- A first and second flange. Each flange may comprise a longitudinal structure, which intersects an axis at a first and second acute angle, respectively. Thus, a triangular shape is outlined by the axis and the acute angles.

- A connection piece interconnecting the first and second flange.

- A first and a second clamping unit may be positioned at the respective flanges. Each clamping unit may comprise a longitudinal indent parallel to the respective flange, thereby forming a blade guide adapted for holding and sliding a blade.

- The respective clamping units and the respective flanges may comprise at least a pair of complementary recesses positioned distal to the connection piece for a fastener.

The intermediate body described above enables the user to use any suitable third party blade, such as a band blade.

The user may slid the blade along the blade guide and fasten the blade by tightening one or more fasteners. Furthermore, the blades can be slid forward as they are worn down by the friction with the tiles.

Furthermore, this enables the skilled person to extent the free end part to a length longer than the sides of a triangle defined by the first acute angle, the second acute angle and the blade distance. This will result in a large restoring force. In an embodiment the clamping unit has a projection for further control of the blades. The projection is typically positioned distal to the indent in order to give the maximum control. The blades can be adapted to the projection by having a series of blade holes along part of the longitudinal structure of the blade.

In an embodiment the projection may be formed by a recess and a fastener extending through the recess.

The user may choose an appropriate length of a free end part of the blade.

In an embodiment the connection piece may have a connection piece notch facing the tip, which together with the hollow triangle creates more space for the earth and weed to move through, when being cut. In an embodiment the connection piece has a body hole complementary to a fastener for fastening the intermediate body to a shaft.

An object of the invention is obtained by a garden tool for weed removal in a tile system, the garden tool comprising

- a shaft comprising a shaft head and a shaft hole;

- a horticultural implement wherein the intermediate body further comprises a body hole complementary to the shaft hole such that the holes form a fastener slot for insertion of a fastener. In an embodiment the horticultural may further comprise an L-formed clamp head connected to the intermediate body and acting as an extension of the intermediate body. The clamp head may have a clamp hole acting as a body hole for fastening a horticultural implement to a shaft.

Description of the Drawing

Fig. 1 illustrates a horticultural implement;

Fig. 2 illustrates another horticultural implement;

Fig. 3 illustrates a process for obtaining a horticultural implement;

Fig. 4 illustrates a metal piece at different steps of the process; Fig. 5 illustrates an embodiment of an intermediate body;

Fig. 6 illustrates an embodiment of an intermediate body with two blades;

Fig. 7 illustrates an embodiment of a garden tool;

Fig. 8 illustrates another embodiment of a garden tool;

Fig. 9 illustrates another embodiment of a garden tool; and

Fig. 10 illustrates another embodiment of a garden tool.

Horticultural implement 10

First blade A

Second Blade B

Free end part 12A, 12B

Connection part 14A, 14B

Tip 16

Tip angle 18

Blade recess 19

Metal piece 20

Bending points 22A, 22B

Blade distance 30

Axis 50

Acute angle 52A, 52B

Triangular shape 60

Triangle 62

Triangle side 64A, 64B

Fastener 70

Intermediate body 100

Flange 102A, 102B

Connection piece 110

Connection piece notch 115

Body hole 120

Clamping unit 120A, 120B

Longitudinal Indent 122A, 122B

Projection 124A, 124B

Pair of complementary recesses 130A, 130B

Blade guide 140A, 140 B

Straightener 150

Straightener hole 152

Curved section 160

Shaft 200

Shaft head 210

Shaft hole 220

Garden tool 300

Clamp head 310

Clamp hole 320 Process 400

Providing 410

Bending 420

Pre-bending 425

Hardening 430

Detailed Description of the Invention

Fig. 1 illustrates a horticultural implement 10 for weed removal in a tile system. The horticultural implement 10 comprising:

- A first blade A and second blade B. Each blade A, B comprises a longitudinal flat structure, which has a free end part 12 A, 12B and a connection part 14 A, 14B.

- An intermediate body 100 holds the first and second connection parts 14 A, 14B at a first and second acute angle 52A, 52B relative to an axis 50. Thereby forming a triangular shape 60, where the free end parts 12 A, 12B form a tip 16 with a tip angle 18.

The intended use of the horticultural implement 10 is to remove weed in a tile system. The weed is removed by placing the tip into a groove between two tiles and then pulling the horticultural implement 10 along the groove. The blades A, B will then cut the weed along the groove.

The triangular shape 60 is hollow, which enables earth in the groove to move through the horticultural implement 10.

The blades A, B may be sharp. However, the blades A, B do not need to be sharp, when used for the first time, nor do they need to be manually sharpened at a later stage. Because the act of pulling the horticultural implement 10 along the groove creates friction between the blades A, B and the tiles, which sharpens the blades A, B. Thus, the horticultural element 10 is self-sharpening. This effect increases the usability and the lifetime of the horticultural element.

In this embodiment the intermediate body 100, the first blade A and the second blade B are formed as one body. The first connection part 14A is a first bending point 22A bend relative to the axis 50 in a first acute angle 52A forming the first blade A. The second connection part 14B is a second bending point 22B bend relative to the axis 50 in a second acute angle 52 A forming the second blade B.

The one body makes the horticultural implement 10 easier to attach on a shaft as it only has a single possible setting.

Fig. 2 illustrates the blades of a horticultural implement 10, where an intermediate body 100 is not shown, because the term intermediate body 100 should be interpreted broadly.

The horticultural implement 10 has a first blade A and second blade B. Each blade A, B is flexible and comprises a longitudinal flat structure, which has a free end part 12A, 12B and a connection part 14A, 14B. The horticultural implement 10 has a not shown intermediate body 100, which holds the first and second connection parts 14 A, 14B at a first and second acute angle 52 A, 52B relative to an axis 50. Thereby a triangular shape 60 is formed, where the free end parts 12 A, 12B form a tip 16 with a tip angle 18. In this embodiment the axis 50 divides the blades A, B into the free end parts 12A, 12B and the connection parts 14A, 14B.

In this embodiment the intermediate body 100 could be any element capable of holding the connection parts 14 A, 14B, thereby securing the blades A, B at the first and second acute angle 52A, 52B, respectively.

The horticultural implement 10 defines along the axis 50 a blade distance 30 between the first blade A and second blade B. The blade distance 30 defines along with the first and second acute angle 52A, 52B a triangle 62, which has a first and second tri- angle side 64 A, 64B.

In this embodiment each free end part 12A, 12B is longer than the corresponding triangle side 64A, 64B. This forces the free end parts 12A, 12B together, thereby creating a restoring force. The effect of the restoring force is that the free end parts 12A, 12B are held together such that the tip 16 is always present even though large forces is exerted on the horticultural implement 10.

It is possible to visibly inspect, whether there is a large restoring force present as this causes the free end parts 12 A, 12B to curve. Thereby the summation of the first acute angle 52A, the second acute angle 52B and tip angle 18 is less than 180 degrees.

The curvature of the free end part 12 A, 12B depends on both the flexibility of the blades A, B and the restoring force. The skilled person would through trials be able to get a feel of the restoring force.

Fig. 3 illustrates a process 400 for obtaining a horticultural implement 10.

The process 400 comprises the following steps:

- Providing 410 a flat, longitudinal metal piece 20. The metal piece defines an axis 50. - Pre-bending 425 a middle part of the metal piece 20. This creates a curved section

160;

- Bending 420 the metal piece 20 relative to the axis 50 at two bending points 22A, 22B into a triangular shape 60. Thereby the metal piece 20 is divided into an intermediate body 100, a first and a second free end part 12A, 12B intersecting the axis 50 at a first and a second acute angle 52 A, 52B.

- hardening 430 the metal piece 20.

The pre-bending 425 of the metal piece 20 causes the horticultural implement 10 to form a triangular shape 60, where the intermediate body 100 has a curved section 160 facing towards the tip 16.

The hardening step 430 is done last as tests showed that the hardening makes the curved section 160 of the intermediate body 100 into, essentially, a spring. The intermediate body 100 may then be attached to a shaft 200. The attachment to the shaft 200 is done in a way that will straighten the curved section 160 of the intermediate body 100. The straightening causes a restoring force between the free end parts 12 A, 12B. The restoring force ensures that the free end parts 12 A, 12B form a tip 16. Tests have shown that the horticultural implement 10 made by the process 400 will still form a tip even if the free end parts 12 A, 12B are shortened. The horticultural implement 10 will when in intended use be shortened due to friction with the tiles in the tile system.

Thus, the horticultural implement 10 made by the process 400 has an increased lifetime compared to another horticultural implement 10 made by a different process.

The process 400 may further comprise another pre-bending 425 of the metal piece 20 step, where the to-be free end parts 12A, 12B of the metal piece 20 is bent to create a first and second free end curved section. When the intermediate body 100 is straightened the free end parts 12 A, 12B will be forced together, thereby straightening the free end parts 12 A, 12B. This will further increase the restoring force as the free end parts 12 A, 12B will act as springs.

Fig. 4I-III illustrates a metal piece 20 after the different steps of the process 400. Fig. 41 illustrates a metal strip 20 defining an axis 50. Fig. 411 illustrates a metal strip 20 after the pre-bending 425 and bending 400 step. The metal strip 20 is divided by a first bending point 22A and second bending point 22B into an intermediate body 100, a first blade A and a second blade B. The blades 12 A, 12B are bent to form a first acute angle 52 A and a second acute angle 52B relative to the axis 50, respectively.

Each blade A, B comprises a free end part 12A, 12B and a connection part 14A, 14B at the bending point 22A, 22B, which is connected to the intermediate body 100.

The hardening step does not change the shape of the metal piece 20. However, the metal piece 20 is now equivalent to a horticultural implement 10 as it may now be attached to a shaft 200.

Fig. 4III illustrates the change in the shape of the horticultural implement 10, when the horticultural implement 10 made by the process 400 is attached to a shaft 200 (not shown). The horticultural implement 10 defines along the axis 50 a blade distance 30 between the first blade A and the second blade B. The blade distance 30 defines along with the first and second acute angle 52A, 52B a triangle 62, which has a first and second tri- angle side 64 A, 64B.

Each free end part 12A, 12B is longer than the corresponding triangle side 64A, 64B. This forces the free end parts 12A, 12B together, thereby creating a restoring force. The effect of the restoring force is that the free end parts 12 A, 12B are held together such that the tip 16 is always present even though large forces is exerted on the horticultural implement 10.

It is possible to visibly inspect, whether there is a large restoring force present as this causes the free end parts 12 A, 12B to curve. Thereby the summation of the first acute angle 52A, the second acute angle 52B and tip angle 18 is less than 180 degrees.

The curvature of the free end part 12 A, 12B depends on both the flexibility of the blades A, B and on the restoring force. The skilled person would through trials be able to get a feel of the restoring force.

The curvature shown in Fig. 4III is exaggerated as the hardening of the horticultural implement 10 will decrease the flexibility considerably. Thus, in this case even a small curvature is an indication of a large restoring force. The blades A, B do surprisingly not need to be sharp, when used for the first time, nor do they need to be manually sharpened at a later stage. Because the act of pulling the horticultural implement 10 along the groove creates friction between the tiles and the blades A, B, which sharpens the blades A, B. Thus, the horticultural element 10 is self-sharpening. This surprising effect increases the usability and the lifetime of the horticultural element 10.

The usability and lifetime of the horticultural implement 10 is increased significantly when the self-sharpening effect is combined with the restoring force. As the blades sharpen material is removed and the free end parts 12A, 12B will over time shorten, however the restoring force will ensure that the free end parts 12 A, 12B still form a tip 16.

Fig. 5I-III illustrates an embodiment of an intermediate body 100, where Fig. 51 dis- closes a top view of the intermediate body 100.

The purpose of the intermediate body 100 is to hold two not shown blades A, B in a configuration similar to fig. 2, thereby forming a horticultural implement 10. The intermediate body 100 has a first and second flange 102A, 102B, which comprises a longitudinal structure. The longitudinal structures intersect an axis 50 at a first and second acute angle 52A, 52B, respectively, thereby forming a triangular shape 60 (not shown). The intermediate body 100 has a connection piece 110 interconnecting the first and the second flange 102 A, 102B.

The connection piece 110 has a connection piece notch 115, which will create more hollow space for earth and weed to slide through. Thereby decreasing the risk of creat- ing a plough effect where the blades A, B no longer cut the weed.

The connection piece 110 has a body hole 120 adapted for a fastener 70 (not shown) for attaching the intermediate body 100 to a shaft 200 (not shown).

The intermediate body 100 has a first and a second clamping unit 120 A, 120B posi- tioned at the respective flanges 102 A, 102B. Each clamping unit 120 A, 120B comprises a longitudinal indent 122A, 122B (See Figs. 5II-5III) parallel to the respective flange 102 A, 102B, thereby forming a blade guide 140 A, 140B adapted for holding and sliding the blade A, B (not shown). The skilled person would know how to be able to create blade guides 140 A, 140B in another way having at least the same function as the present embodiment. The respective clamping units 120 A, 120B and the respective flanges 102 A, 102B comprise at least a pair of complementary recesses 130 positioned distal to the connection piece 110 for a fastener 70. The fasteners 70 are released when the blades are to slide and the fasteners 70 are fastened when the blades A, B are to be hold in place.

A nut may be attached to the fasteners 70 to increase the fastening effect. The recesses 130 may be threaded, thereby enabling the fasteners 70 to fasten without a nut.

In this embodiment each clamping unit 120A, 120B has a projection 124A, 124B for further holding a blade A, B adapted for the projection 124 A, 124B.

The projections 124A, 124B can be formed by positioning a fastener 70 in a recess.

A blade A, B can be adapted for the projection 124 A, 124B by having blade recesses 19 along part of the longitudinal flat structure of the blade A, B.

Fig. 511 illustrates a top-side view of the intermediate body 100 without the fasteners 70. Fig. 511 shows more clearly the blade guide 140A formed by the flange 102A and clamping unit 122 A. Fig. 5III illustrates an embodiment of a blade guide 122 formed by the flange 102 A and clamping unit 122 A.

Fig. 61-11 illustrates an embodiment of an intermediate body 100, thereby forming a horticultural implement 10.

Horticultural implement 10 having a first blade A and second blade B. Each blade A, B is flexible and comprises a longitudinal flat structure, which has a free end part 12A, 12B and a connection part 14A, 14B. The blades A, B are adapted for projections 124 A, 124B by having blade recesses 19 (see Fig 611) along part of the longitudinal flat structure of the blade A, B.

Horticultural implement 10 has an intermediate body 100 disclosed in Fig 5. The in- termediate body 100 holds the first and second connection parts 14 A, 14B at a first and second acute angle 52A, 52B relative to an axis 50. Thereby a triangular shape 60 is formed, where the free end parts 12 A, 12B form a tip 16 with a tip angle 18.

In this embodiment the axis 50 divides the blades A, B into the free end parts 12A, 12B and the connection parts 14A, 14B.

In this embodiment the intermediate body 100 could be any element capable of holding the connection parts 14 A, 14B, thereby securing the blades A, B at the first and second acute angle 52A, 52B, respectively.

The horticultural implement 10 defines along the axis 50 a blade distance 30 between the first blade A and second blade B. The blade distance 30 defines along with the first and second acute angle 52A, 52B a triangle 62 (not shown), which has a first and second triangle side 64A, 64B (not shown).

The blade guides 122 A, 122B enable the user to change the length of each free end part 12 A, 12B. The user should arrange the blades A, B such that each free end part 12A, 12B is longer than the corresponding triangle side 64A, 64B. This forces the free end parts 12A, 12B together, thereby creating a restoring force. The effect of the restoring force is that the free end parts 12 A, 12B are held together such that the tip 16 is always present even though large forces is exerted on the horticultural implement 10. In this embodiment a user is able to control the restoring force by controlling the length of the free end parts 12 A, 12B. It is possible to visibly inspect, whether there is a large restoring force present as this causes the free end parts 12 A, 12B to curve. Thereby the summation of the first acute angle 52A, the second acute angle 52B and tip angle 18 is less than 180 degrees. The curvature of the free end part 12 A, 12B depends on both the flexibility of the blades A, B and on the restoring force. The skilled person would through trials be able to get a feel of the restoring force.

The blades A, B does surprisingly not need to be sharp, when used for the first time, nor do they need to be manually sharpened at a later stage. Because the act of pulling the horticultural implement 10 along the groove creates friction between the tiles and the blades A, B, which sharpens the blades A, B. Thus, the horticultural element 10 is self-sharpening. This surprising effect increases the usability and the lifetime of the horticultural element 10.

The usability and lifetime of the horticultural implement 10 is increased significantly when the self-sharpening effect is combined with the restoring force. As the blades sharpen material is removed and the free end parts 12A, 12B will over time shorten, however the restoring force will ensure that the free end parts 12 A, 12B still form a tip 16.

Fig. 71-11 illustrates an embodiment of a garden tool 300.

The garden tool 300 having a shaft 200, which comprises a shaft head 210 having a shaft hole 220 for a fastener.

The garden tool 300 has a horticultural implement 10 made by the process 400, which is shown in fig. 4III. The horticultural implement 10 further comprises a body hole 120 complementary a shaft hole 220 and a straightener 150 with a straightener hole 152 complementary to the body hole 120 and the shaft hole 220.

The horticultural implement 10 further comprises a clamp 310 with a clamp hole 320 complementary to the straightener hole 152, the body hole 120 and the shaft hole 220, thereby forming a fastener slot adapted for the insertion of a fastener 70. This makes the horticultural implement 10 easily interchangeable, when worn out. The fastener slot may be threaded or the fastener may engage with a nut.

The purpose of the straightener 150 is to straighten the intermediate body 100, thereby creating the restoring force between the two blades A, B. The free end parts 12 A, 12B are curved in the figure.

Fig. 8 illustrates another embodiment of a garden tool.

The garden tool 300 has a long shaft 200, which comprises a shaft head 210 having shaft holes 220.

The garden tool 300 has a horticultural implement 10 made by the process 400, which is shown in fig. 4III. The horticultural implement 10 further comprises a body hole 120, a straightener 150 with a straightener hole 152 complementary to the body hole 120 and a L-formed clamp 310 having a clamp hole 320' complementary to the body hole 120 and the straightener hole 152. The L-formed clamp 310 further comprises a clamp hole 310 complementary to the shaft holes 220.

The L-formed clamp 310 is an extension of the intermediate body 100 and thus the clamp hole 310 can be considered to be a body hole 120.

Thereby the holes 120, 152, 320 form a fastener slot adapted for the insertion of a fas- tener 70. This makes the horticultural implement 10 easily interchangeable, when worn out.

The fastener slot may be threaded or the fastener may engage with a nut. The purpose of the straightener 150 is to straighten the intermediate body 100, thereby creating the restoring force between the two blades A, B.

The free end parts 12 A, 12B are curved in the figure. Fig. 9 illustrates another embodiment of a garden tool 300.

The garden tool 300 has a shaft 200 with a shaft head 210 and a shaft hole 220 at the shaft head 210.

The garden tool 300 has a horticultural implement 10 shown in fig. 6. The horticultural implement 10 further comprises a body hole, a clamp head 310 and an L-formed clamp head 310' . The clamp heads 310, 310' have clamp holes 320, 320', 320" for attaching the horticultural implement 10 to the shaft 210. Fig. 10 illustrates another embodiment of a garden tool 300.

The garden tool 300 has a shaft 200 with a shaft head 210 and a shaft hole 220 at the shaft head 210.

The garden tool 300 has a horticultural implement 10 shown in fig. 6. The horticultural implement 10 further comprises a body hole and two L-formed clamp heads 310, 310'. The clamp heads 310, 310' have clamp holes 320, 320' for attaching the horticultural implement 10 to the shaft 210.