Camper jack assembly

Details Camper jack assembly Camper jack assembly

1992-11-30

1994-06-28

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Vehicle-body lifters

254 93H, B60P 164

Patent

active

053240030

ABSTRACT:
A camper jack for mounting on a camper body, the jack having an extensible leg projectable from a hollow jack housing and attached to the camper body along the length of the housing. A piston cooperating in a cylinder in the extensible leg extends the leg from the housing. A hydraulic fluid reservoir is formed in the extensible leg in an annular space surrounding the cylinder. A valve block is coextensive with the extensible leg at the foot of the leg and contains the valves and pumping piston for the jack. Valving in the valve block permits manual extension and retraction of the extensible leg. Grooves are provided in a novel needle valve allowing control of the rate of flow of the hydraulic fluid. Pumping motion is controlled by a pump handle receiver.

REFERENCES:
patent: 2583923 (1952-01-01), Anschuetz
patent: 3549027 (1970-12-01), Batson
patent: 3758074 (1973-09-01), Jeffries et al.
patent: 3897044 (1975-07-01), Tallman
patent: 3916939 (1975-11-01), Gillard
patent: 3948479 (1976-04-01), Bedo et al.
patent: 4015822 (1977-04-01), Rasmussen
patent: 4706343 (1987-11-01), Neidigk
patent: 4746097 (1988-05-01), Chung et al.

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