Implements or apparatus for applying pushing or pulling force – Fluid pressure – Vehicle attached
Patent
1976-07-06
1977-09-06
Smith, Al Lawrence
Implements or apparatus for applying pushing or pulling force
Fluid pressure
Vehicle attached
B66F 324
Patent
active
040463540
ABSTRACT:
A jack comprising a cylinder and piston defining an expansible chamber having opposed cylinder and piston faces and being adapted to receive a pressurized, hardenable liquid, such as an epoxy resin mixed with a suitable hardener or catalyst, for relative extension of the cylinder and piston. The piston face protrudes outwardly beyond the body of the piston with the outermost protruding portion of the piston face being at the center thereof. The cylinder face has a pocket therein in line with the outermost portion of the piston face, the latter being surrounded by a space for the liquid when the cylinder and piston faces are relatively retracted, this space constituting a portion of the chamber. The jack further has an inlet for the flow of liquid to the space and an outlet extending from the pocket for exit of air from the chamber as the liquid enters the space, and means for closing the inlet and the outlet whereby with the cylinder and piston pressurized by the liquid and with the cylinder and piston in a selected relative extended position the closing means is operable to entrap the liquid within the chamber to hold the cylinder and piston at their extended position and to permit the liquid to harden thereby to fix the cylinder and piston in their extended position.
REFERENCES:
patent: 2886875 (1959-05-01), Anderson
patent: 3194853 (1965-07-01), Weise et al.
Smith Al Lawrence
Watson Robert C.
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