AIR COMPRESSOR UNIT

Technical field

This invention relates to an air compressor unit.

More specifically, the invention relates to an air compressor unit which can be fixed to the wall.

Still more specifically, the invention relates to a compressor which can be fixed to the wall with an integrated reel winder.

Background art

Air compressors are used both in work and domestic environments for a wide range of purposes.

In particular, in the latter context, the use of air compressors is becoming ever greater, for example in the DIY sector or even for hobby or sporting activities, such as, for example, model-making or cycling.

The air compressor units available on the market have multiple shapes and sizes but are usually quite bulky.

In the garage where the activities listed above are generally performed the air compressors often form obstructions both to the passage of persons and to the movement of vehicles and equipment.

An electrical cable to be connected to the main power supply also necessarily lead from them, as well as a hose for distributing the compressed air, at the end of which a suitable pneumatic tool is normally connected, which can also be a simple gun.

Moreover, the unwinding and the rewinding of the hose for distributing air is not always easy and immediate.

Wall-mounted reels have been made for this purpose which allow an easy winding/unwinding of the compressed air hose.

However, these reels have not overcome the drawback of the overall size of the compressor which must still be positioned on the ground close to the reel itself and connected to it by means of a relative hose. All this often results in unsafe conditions for people working in the vicinity of the compressor on account of its overall size and the presence of the relative electrical cable and compressed air distribution hose.

Disclosure of the invention

The aim of this invention is to overcome the drawbacks of the prior art by means of an air compressor which is compact and practical to use.

A further aim of this invention is to provide an air compressor which is at the same time simple and inexpensive to make.

The technical features of the invention according to the above-mentioned objects may be easily inferred from the contents of the appended claims, especially claim 1 , and, preferably, any of the claims that depend on this claim.

Brief description of the drawings

The advantages of the present invention are more apparent from the detailed description which follows, with reference to the accompanying drawings which illustrate a preferred embodiment of the invention provided merely by way of example without restricting the scope of the inventive concept, and in which:

- Figure 1 is a schematic perspective view from above of an air compressor made according to the invention;

- Figure 2 is a schematic perspective view from above of the air compressor of Figure 1 without some covering elements;

- Figure 3 is a schematic side elevation view, partly in blocks and with some parts cut away to better illustrate others, of the air compressor according to the invention;

- Figure 4 is a schematic side elevation view partly in blocks of the air compressor according to the invention;

- Figure 5 is a cross section view through the line V-V of Figure 4;

- Figure 6 is a schematic perspective view of an air compressor made according to the invention;

- Figure 7 is a schematic perspective view of an air compressor made according to the invention. Detailed description of preferred embodiments of the invention

With reference to the accompanying drawings, the numeral 1 denotes in its entirety an air compressor made in accordance with the invention.

As illustrated in Figure 1 , the air compressor 1 comprises a plate 2 which can be fixed to the wall and a supporting and containing body 3 fixed to the plate 2.

According to the embodiment of Figures 1 to 5, the supporting body 3 is preferably hinged on the plate 2.

According to other embodiments, for example those of the type illustrated in Figures 6 and 7, the supporting body 3 is rigidly connected to the plate 2.

As schematically illustrated in Figures 3 and 4, according to one embodiment, the compressor 1 comprises a locking system, schematically illustrated with a block 40, to prevent the rotation of the hinge 4.

The plate 2 is illustrated by way of example fixed to a wall P.

The plate 2, in Figures 6 and 7, is not fixed to any wall in such a way that the compressor 1 is portable.

With reference to Figures 1 to 5, the supporting and containing body 3 is hinged on the plate 2 by means of a respective hinge 4, so as to oscillate about a respective pivot axis A1.

The hinge 4 is defined by a first hinge element 4a formed on the plate 2 and by a second hinge element 4b formed on the supporting and containing body 3.

Both the above-mentioned first and second hinge elements 4a, 4b comprise portions with a cylindrical cavity inside of which is inserted stably a pin 5, shown in Figure 3.

The plate 2 which can be fixed to the wall preferably has an upper portion 2a and a lower portion 2b.

The above-mentioned hinge element 4a is formed projecting in the above- mentioned upper portion 2a of the plate 2.

On the upper portion 2a there are also formed a plurality of holes 6 designed for housing respective screws, not illustrated, for fixing the plate 2 to the wall.

As clearly shown in Figures 1 to 4, housings 7 for pneumatic tools, not illustrated, are made on the lower portion 2b of the plate 2.

In other words, the above-mentioned and not illustrated pneumatic tools are advantageously placed, when not used, at the housings 7, shaped for this purpose.

Again with reference Figures 1 to 4, the lower portion 2b of the plate 2 is advantageously shaped in a cantilever fashion in such a way as to allow the above-mentioned housings 7 for pneumatic tools to be suitably spaced mounted on a wall P on which the plate 2 is fixed.

Thanks to this distance of the housings 7 from the wall P, the pneumatic tools, not illustrated, can be easily placed on the respective housings 7 as they can protrude forwards from them, towards the above-mentioned fixing wall P, and away from them, in order to achieve the best equilibrium position and not to strike against the surface of the wall P.

With reference to Figure 2, the supporting and containing body 3 comprises a central wall 8 and, as illustrated in Figure 1 , two side guards 9, 10 located on opposite sides of the central wall 8.

As illustrated in Figure 3, the compressor 1 comprises an air compression unit 11 , supported by the above-mentioned supporting and containing body 3.

The air compression unit 1 1 is electrically powered and comprises an electric motor 12 and a pumping unit 22 which are operatively connected to each other.

As illustrated in Figure 2, the air compressor 1 comprises a reel 13 for winding a flexible hose 14 for the passage of the compressed air generated by the compression unit 11.

The above-mentioned reel 13 is supported rotatably by the central wall 8 to rotate about a respective central axis A2.

The rotation of the reel 13 about the axis A2 determines, as a function of the direction of rotation, the winding or unwinding of the flexible hose 14 wound on it.

Advantageously, the air compressor 1 comprises an elastic mechanism for automatically winding the reel 13, of substantially known type and not illustrated, nor described further.

The above-mentioned reel 13 and automatic elastic winding mechanism form, in their entirety for the air compressor 1 , respective means 15 for winding the flexible hose 14.

As illustrated in Figure 2, the above-mentioned compression unit 1 1 and winding means 15 are positioned on opposite sides of the central wall 8. The above-mentioned guard 9, 10 of the supporting and containing body 3 are also positioned on opposite sides of the central wall and designed to cover, respectively, the compression unit 1 1 and the winding means 15. With reference to what is illustrated in detail in Figure 5, at the central axis A2 there is a rotary element 16 for distributing the compressed air.

The rotary distributor element 16 is designed to transfer to the flexible hose 14 wound around the reel 13 the compressed air generated by the compression unit 1 1.

More in detail, again with reference to Figure 5, the rotating distributor element 16 comprises a hollow cylindrical element 17 integral with the central wall 8 and an external manifold 18.

Openings 17a designed to place the cylindrical element 17 in fluid communication with the external manifold 18 are made on the hollow cylindrical element 17.

The external manifold 18 is supported rotatably by the hollow cylindrical element 17 and between them are interposed sealing rings 19 designed to prevent undesired escape of the air. On the external manifold 18 is positioned a block 20, which is partly visible in Figure 2, for connecting one end, not illustrated, of the flexible hose 14 for distributing air.

The flexible hose 14, connected to the block 20, passes inside the reel 13 through an opening made on a cylindrical wall 13a of the reel 13, the opening being shaped inclined so as to follow the curvature of the hose 14 which is wound.

With reference to Figure 1 , on the side guard 10 for covering the winding means 15 there is an opening 28 from which emerges an end 14a of the flexible hose 14 designed to be connected to a relative pneumatic tool.

As illustrated in Figure 3, the supporting and containing body 3 comprises a supporting structure 21 , fixed to the wall 8 and emerging from it.

The supporting structure 21 having a first portion 21 a designed to rotatably support the shaft 12a of the electric motor 12, by interposing rolling means of known type and not illustrated.

The supporting structure 21 also comprises a second portion 21 b designed to support the above-mentioned pumping unit 22.

The pumping unit 22 is advantageously of alternating type and has a piston which is movable inside a respective cylinder, both of known type and not shown in detail in the accompanying drawings.

The movement of the pumping unit 22 occurs by means of a connecting rod-crank mechanism 23 and the motion is transmitted to the latter by the motion from the electric motor 12 by means of a transmission belt wherein a belt 24 engages between respective pulleys visible only partly in the accompanying drawings and therefore not labelled with respective reference numerals.

As illustrated in Figures 1 and 4, the side guard 9 designed to cover the compression unit 1 1 has a plurality of slots 25 designed for the circulation of air to and from the compression unit 1 1.

Advantageously, the above-mentioned slots 25 are made both on a lower portion 9a of the guard 9 and on a relative upper portion 9b. As clearly illustrated in Figure 5, on the shaft 12a of the electric motor 12 (not illustrated in the drawings to better display other parts) are keyed two fans 26, 27 respectively lower and upper.

The lower fan 26 is configured to draw cold air coming into the slots 25 made in the lower portion 9a of the guard 9.

The upper fan 27 is configured to push hot air coming out from the slots 25 made in the upper portion 9b of the guard 9.With reference to the embodiments of Figures 6 and 7, it should be noted that the compressor 1 illustrated comprises a handle 29 for gripping the compressor.

Preferably, the handle 29 extends from the plate 2 upwards, beyond a vertical dimension of the body 3.

As illustrated, the compressor 1 illustrated, for example, in Figures 6 and 7 comprises a base 30 for resting on the ground.

The base 30 extends under the body 3, preferably stating from the plate 2, in particular from the lower portion 2b of it.

Looking at the side of the compressor 1 , the base 30 and the plate 2 form a sort of“L” structure.

The compressor 1 comprises a tank 31 for the compressed air.

As illustrated in Figure 7, the tank 31 is in the form of a cylinder and is housed in the base 30.

In particular, the base 30 preferably comprises a housing 30a in which the tank 31 is positioned.

As illustrated in Figure 6, the tank 31 is integrated in a tubular structure 32 which, preferably, also defines the base 30 and/or the handle 29 of the compressor 1.

The tank 31 is connected to the air compressor unit 11 in a substantially known manner not described.

With reference in particular to Figure 6, given in particular the presence of the tank 31 , the compressor 1 comprises a unit 33 for adjusting the pressure of the air which in turn comprises, for example, a pressure switch, a pressure gauge and a pressure reducer of substantially known type.

In use, the air compressor 1 according to the invention is preferably fixed to the wall P by the above-mentioned and not illustrated screws attached to the plate 2.

In order to use the compressor 1 , the user connects a pneumatic tool, not illustrated, at the end 14a of the flexible hose 14 emerging from the opening 28 of the supporting and containing body 3.

Once the above-mentioned and not illustrated pneumatic tool is connected to the flexible hose 14, the user, simply by pulling, unwinds from the reel 13 the length of hose 14 required for the purpose of the operations which must be performed.

At this point, by actuating an electric switch 129, advantageously mounted at the front of the supporting and containing body 3, the user actuates the air compression unit 11 which immediately provides compressed air to the pneumatic tool.

If during use the user changes position, the supporting and containment body 3, thanks to the hinge 4 if planned, may still oscillate about the axis A1 to facilitate this movement.

At the end of use of the compressed air, in known manner, the user, by means of a simple tug of the flexible hose 14, activates the rewinding by the above-mentioned rewinding means 15.

If the compressor 1 is equipped with the tank 31 , the user will have available the compressed air stored in the tank 31.

The tank may advantageously be of the traditional tubular type, or also of any desired shape.

If the compressor is provided with the supporting base 30, it can also be left in the stable position on the ground, without necessarily being constrained to a wall using the plate 2.

The handle 29 allows, in particular in the latter case, an easy movement of the compressor 1.

The air compressor unit 1 according to the invention achieves the preset aims and brings important advantages.

A first advantage connected to the production of an air compressor 1 according to the invention is due to its compact architecture which encloses in one item both the compression unit and the means of winding the hose for distributing the compressed air and, if necessary, a tank for the air.

Another advantage linked to the invention is due to the possibility of fastening the above-mentioned assembly to the wall, with the clear result of eliminating any obstruction on the ground of the compartment where the compressor is located.

Further, the presence of a structural central wall 8 makes it possible to have the guards side 9, 10 easily removable for accessing inside the compressor and carrying out any maintenance both on the compression unit and on the winding means.

By adopting the air compressor according to the invention there is further advantage of not generating any obstruction on the ground near the working zone, thereby considerably increasing the safety of users. One need only consider even the simple advantage of not having on the ground the electricity supply cable for the compressor.