FR2557867A1 - Lifting device for a motor vehicle. - Google Patents

Abstract

Pneumatic lifting device for a motor vehicle, of simple and easy automatic use. The pneumatic lifting apparatus comprises essentially: a hollow body 3, a valve 1, a decompressor 2, a lifting finger 5, two pistons 7, 8 nesting in each other, a flat foot with non-skid reliefs 9 upon which, on either side, are welded, vertically and symmetrically, two safety rails with a rack 6 sliding laterally against the hollow body 3 in guides with an automatic ratchet 4. The invention, of simple and easy use, can be used in any situation in which ordinary motor vehicle lifting manoeuvres are performed, by improving those operations which today are inconvenient and difficult.

Description

Lifting device for motor vehicle
The invention relates to a lifting device for a motor vehicle comprising a hollow body slidably mounted on at least one tubular support erected on a base.

 Many lifting devices of this type are known, which are actuated manually by means of a jack, the operation of which is slow and difficult.

To overcome the drawbacks of known lifting devices,
The device according to the invention is characterized in that it forms a sealed assembly provided with a compressed air intake valve, the whole so that by injection of compressed air into a part of the sealed assembly the hollow body moves from bottom to top on the tubular support.

 The accompanying drawing shows, schematically and by way of example, an embodiment of the lifting device according to the invention.

 Figure 1 is a front elevational view.

 Figure 2 is a side elevational view.

 FIG. 3 is a partial view thereof, in axial section of FIG. 2.

 The apparatus represented in the drawing comprises the following essential mechanical elements, namely: a hollow metallic body 3 of cast iron, steel or copper comprising a pneumatic compression valve I, a screw decompressor 2 and two pistons 7, 8 of steel , extendable and retractable, fitting into one another. At the lower end of the second piston 8 of smaller diameter is mounted a flat steel foot 9, with non-slip reliefs, on which are symmetrically welded on each side two rack-and-pinion safety rails 6, mounted vertically and sliding laterally against the hollow body 3, in ratchet guides 4, to stabilize and keep locked, as it rises, the jack loaded. On a base, behind the hollow body 3 and halfway up, is arranged a foldable lifting finger 5 intended to be introduced into a housing located under the chassis or body of motor vehicles.

 This device can be used in all cases where motor vehicle lifting operations are carried out.

 The operation of the device is as follows.

Phase I. ascent
After having introduced the lifting finger 5 of 11 device well at the bottom of the abovementioned housing, under the vehicle, the connection of a bottle of compressed air is screwed on the valve 1 and the tightening of the screw of the decompressor is checked, it It suffices to inject the compressed air which acts immediately and in the following manner, depending on the design of the device chosen, that is to say: either by simple mechanical push on the pistons 7, 8, or even by l 'via an endless screw coupled and driven by a miniaturized pneumatic motor.

Phase II. descent
After unlocking the pawls of the rack rails 6, it is sufficient, for the first model of device, to simply decompress the cylinder by unlocking the screw of the decompressor 2 or, in the second hypothesis, to reverse the torque of the pneumatic motor.

Claims (6)

I. Lifting apparatus for a motor vehicle comprising a hollow body (3) slidably mounted on at least one tubular support (8) standing on a base (9), characterized in that it forms a sealed assembly provided with a valve d 'admission of compressed air (1), all so that by injection of compressed air into a part of the sealed assembly the hollow body (3) moves from bottom to top on the tubular support (8). 2. Apparatus according to claim 1, characterized in that the tubular support comprises two elements, one of which (7) is slidably mounted on the other (8). 3. Apparatus according to claim b, characterized in that the compressed air intake valve (1) is mounted in the wall of the hollow body (3). 4. Apparatus according to claim 1, characterized in that it comprises a pressure reducer (2) mounted in the wall of the hollow body (3). 5. Apparatus according to claim 1, characterized in that it comprises a lifting finger (5) articulated to the hollow body (3). 6. Apparatus according to claim 1, characterized in that the hollow body (3) comprises on either side ratchet guide members (4) engaged on rack rails (6) erected on the base (9) .