Hydraulic jack

Details Hydraulic jack Hydraulic jack

1978-02-17

1979-11-13

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

B66F 324

Patent

active

041740955

ABSTRACT:
A hydraulic jack includes a fixed, cylindrical member mounted on a base, and a moveable member mounted exteriorly around and shiftable on the fixed member. The interior of the fixed and moveable members defines an expandable and contractable chamber, which, when expanded with hydraulic liquid extends the jack upwardly. The space between the exterior surface of the fixed member and the interior surface of the moveable member defines a second expandable and contractable chamber, which, when expanded with hydraulic liquid retracts the jack downwardly. Adjustable lift elements are mounted on the moveable member and are adapted to engage a device to be elevated.

REFERENCES:
patent: 2163982 (1939-06-01), Mercier
patent: 2429014 (1947-10-01), Christopher
patent: 2535759 (1950-12-01), Schwantner
patent: 3890684 (1975-06-01), Tallman

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