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Patent Searching and Data


Title:
FASTENER
Document Type and Number:
WIPO Patent Application WO/2017/112962
Kind Code:
A1
Abstract:
This invention relates to a fastener (10) that resists loosening under vibrations and torque. The fastener (10) comprises a fastener member (12) having a receiving formation in the form of first and second bores (14.1 ) and (14,2), and securing means in the form of first and second securing pins (18.1 ) and (18.2) which are receivable in the respective first and second bores (14.1 ) and (14.2) so to engage a circumferential shoulder portion (18) of a hole (20).

Inventors:
THOMPSON, Roscoe (72 Scarborough Street, Ferryvale, 1490 Nigel, ZA)
TSOTETSI, Phakiso (108 Sunbird Estate, Meteor Road, Sundowner, ZA)
Application Number:
ZA2015/000070
Publication Date:
June 29, 2017
Filing Date:
December 23, 2015
Export Citation:
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Assignee:
THOMPSON, Roscoe (72 Scarborough Street, Ferryvale, 1490 Nigel, ZA)
TSOTETSI, Phakiso (108 Sunbird Estate, Meteor Road, Sundowner, ZA)
International Classes:
F16B39/04; F16B19/10; F16B39/10; F16B39/12; F16B39/20; F16B39/36
Foreign References:
US4092080A1978-05-30
US5252014A1993-10-12
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Claims:
CLAIMS

1. A fastener comprising:

- a fastener member having a receiving formation; and

- securing means receivable in the receiving formation of the fastener member so to engage a portion of the hole to secure the fastener in the hole.

2. The fastener as claimed in claim 1 , wherein the fastener includes urging means for urging and retaining the securing means against the portion of the hole it engages.

3. The fastener as claimed in claim 1 or claim 2, wherein the portion of the hole is a shoulder portion of the hole.

4. The fastener as claimed in any one of the preceding claims, wherein the receiving formation is a first bore which extends along at least part of the length of the fastener member. 5. The fastener as claimed in claim 4, wherein the receiving formation also includes a second bore which is similar to the first bore, the first and second bores being circumferentiaiiy spaced about the fastener member. β. The fastener as claimed in any one of the preceding claims, wherein the securing means is a first securing pin having a first end which is tapered for engaging the portion of the hole, and an opposing second end. 7. The fastener as claimed in claim 8, wherein the securing means also includes a second securing pin which is similar to the first securing pin.

8. The fastener as claimed in claim 2, wherein the urging means is a nut which is threaded over a threaded body protruding from the fastener member.

9. The fastener as claimed in any one of the preceding claims, wherein the fastener member is an elongate fastener member having a head and a shank extending from the head. 10. A method of securing a fastener member in a hole, the method inciuding the steps of:

- locating the fastener member in the hole, the fastener member having a receiving formation;

- inserting securing means in the receiving formation of the fastener member; and

- urging the securing means against a portion of the hole.

11. The method as claimed in claim 10, wherein the fastener member is an elongate fastener member having a head and a shank extending from the head.

12. The method as claimed in claims 10 or 11, wherein the portion of the hole is a shoulder portion of the hole.

13. The method as claimed in any one of claims 10 to 12, wherein the receiving formation is a first bore which extends along at least part of the length of the fastener member.

14. The method as claimed in claim 13, wherein the receiving formation also includes a second bore which is similar to the first bore, the first and second bores being circumferentialiy spaced about the fastener member.

15. The method as claimed in any one of claims 10 to 14, wherein the securing means is a first securing pin having a first end which is tapered for engaging the portion of the hole, and an opposing second end.

16. The method as claimed in claim 15, wherein the securing means also includes a second securing pin which is similar to the first securing pin.

17. A fastener substantially as herein described and/or exemplified with reference to the accompanying drawings.

18. A method of securing a fastener member in a hole substantially as herein described and/or exemplified with reference to the accompanying drawings.

Description:
FASTENER

FIELD OF THE INVENTION This invention relates to a fastener. More particularly, but not exclusively, this invention relates to a fastener that resists loosening under vibrations and torque.

BACKGROUND TO THE INVENTION Fasteners are well known and widely used to mechanically fasten two or more objects together.

A problem with fasteners, and especially with fasteners that are used on moving or vibrating objects is that they could relatively easily become loose over time. This may have a significant impact on the safety of operation, maintenance costs, operating costs, and the like.

OBJECT OF THE INVENTION it is accordingly an object of the present invention to provide a fastener which seeks to overcome or at least reduce the above disadvantage, and/or to provide a fastener that will be a useful aitemative to known fasteners. SUMMARY OF THE INVENTION

In accordance with a first aspect of this invention, there is provided a fastener that is seatabie in a hole and comprising:

- a fastener member having a receiving formation; and

- securing means receivable in the receiving formation of the fastener member so to engage a portion of the hole to secure the fastener in the hole.

The fastener may inciude urging means for urging and retaining the securing means against the portion of the hole it engages.

The portion of the hole may be a shoulder portion of the hole.

The receiving formation may be a first bore which extends along at least part of the length of the fastener member. The receiving formation may also include a second bore which is similar to the first bore, the first and second bores being circumferentiaily spaced about the fastener member.

The securing means may be a first securing pin having a first end which is tapered for engaging the portion of the hole, and an opposing second end. The securing means may also include a second securing pin which is similar to the first securing pin.

The urging means may be a nut which is threaded over a threaded body protruding from the fastener member. The fastener member may be an elongate fastener member having a head and a shank extending from the head. in accordance with a second aspect of the invention, there is provided a method of securing a fastener member in a hole, the method including the steps of:

- locating the fastener member in the hole, the fastener member having a receiving formation;

- inserting securing means in the receiving formation of the fastener member; and

- urging Hie securing means against a portion of the hote.

The fastener member may be an elongate fastener member having a head and a shank extending from the head. The portion of the hole may be a shoulder portion of the hole.

The receiving formation may be a first bore which extends along at least part of the length of the fastener member. The receiving formation may also include a second bore which is similar to the first bore, the first and second bores being circumferentially spaced about the fastener member.

The securing means may be a first securing pin having a first end which is tapered for engaging the portion of the hote, and an opposing second end. The securing means may also include a second securing pin which is similar to the first securing pin. These and other features of the invention are described in more detail below.

BRIEF DESCRIPTION OF THE DRAWINGS One embodiment of the invention is described below, by way of a non-limiting example only and with reference to the accompanying drawings in which: figure 1 is a schematic perspective view of a fastener in accordance with the invention; figure 2 is a schematic exploded view of the fastener of figure 1 ; figure 3 is a schematic side view of the fastener of figures 1 and 2; and figure 4 is a schematic section view on line IV-IV in figure 1. DETAILED DESCRIPTION OF THE INVENTION

With reference to the drawings, a fastener in accordance with the invention is generally indicated by reference numeral 10.

Referring particularly to figure 2, the fastener 10 comprises a fastener member 12 having a receiving formation in the form of first and second bores 14.1 and 14.2, and securing means in the form of first and second securing pins 18.1 and 18.2 which are receivable in the respective first and second bores 14.1 and 14.2 so to engage a circumferential shoulder portion 18 of a hole 20 (see figure 4).

The fastener member 12 is an elongate fastener member which has a hex-shaped head 22 and a shank 24 extending from the head. A distal end region 25 of the shank 24 is threaded to allow the fastener member 12 to be threaded into the hole 20. It should be understood that the head 22 does not have to be hex-shaped, and could embody any other shape. The first and second bores 14.1 and 14.2 extend along at least part of the length of the fastener member 12. More particularly, and as is best shown in figures 2 and 3, the first and second bores 14.1 and 14.2 extend through the head 22 and terminate in the shank 24 to define openings 26 towards their respective blind ends. The bores 14.1 and 14.2 are positioned so to be circumferentially spaced and diametrically opposed about the fastener member 12.1

The first and second securing pins 16.1 and 16,2 have respective first ends 28 which are tapered for engaging the shoulder portion 18 of the hole 20, in use, and respective opposing second ends which are attached to a ring-shaped base 30. Collectively, the base 30 and the securing pins 16.1 and 16.2 define a key.

Urging means in the form of a lock nut 32 is threaded over a threaded body 34 protruding from the head 22 of the fastener member 12 to urging and retain the securing pins 18.1 and 16.2 against the shoulder portion 18 of the hole, in use. In use, and referring particularly to figure 4, the fastener member 12 is located in the hole 20 and tightened as per normal torque specifications to secure the faster member in the hole 20. The securing pins 18.1 and 16.2 are then inserted in the bores 14.1 and 14.2 so that they rest against the shoulder portion 18 of the hole 20. As the nut 32 is threaded over the threaded body 34 and engages the base 30, the respective tapered first ends 28 of the securing pins 16.1 and 16.2 are urged against the shoulder portion 18 of the hole 20. As the nut 32 is further tightened, the respective tapered first ends 28 are adapted to cut into the shoulder portion 18 of the hole 20 to secure the fastener 10 tightiy in the hole 20.

It is envisaged that this invention provides a fastener 10 that better resists loosening under vibrations and torque than conventional known fasteners.

It will be appreciated by those skilled in the art that the invention is not limited to the precise details as described herein and that many variations are possible without departing from the scope of the appended claims. For example, any number of bores and securing pins could be provided on the fastener member 12. Also, the shape of the fastener member 12 is not limited to that of a bolt but could also extend to any other fastener without departing from the scope of the invention.

It will further be appreciated that the foregoing example has been provided merely for the purposes of explanation and is in no way to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment only, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation.