Implements or apparatus for applying pushing or pulling force – Fluid pressure – Vehicle attached
Patent
1980-07-21
1985-12-24
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Fluid pressure
Vehicle attached
B66F 324
Patent
active
045601453
ABSTRACT:
An air bag jack comprising an inflatable member made of a flexible material with a uniform thickness having a top section and a plurality of lower annular sections. The sections sequentially taper in diameter and have a base diameter smaller than the base diameter of the section below forming a generally pyramidal shape enabling the sections to collapse within one another upon deflation into a compact form. The top and bottom annular sections have the ability to conform to the object being supported and the surface of the terrain that is being used. Further the top section's top end wall has a concave surface preventing slippage during inflation. There are also a plurality of rings, one between each pair of adjacent sections extending around the outside of the jack to provide annular support for the wall section adjacently above. Each ring has a half-circle cross sectional configuration to prevent thinning of the inflatable member's wall in the area of junction between sections. The jack is easily inflated by a 12 volt D.C. air pump powered from an automobile cigarette lighter.
REFERENCES:
patent: 1698164 (1929-01-01), Mallory
patent: 2180128 (1939-11-01), Stancliffe
patent: 2725578 (1955-12-01), Keller
patent: 3523679 (1970-08-01), Clay
patent: 3565398 (1971-02-01), Floria et al.
patent: 3695582 (1972-10-01), Clay
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