Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Patent
1980-07-07
1982-06-15
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
251251, B66F 300
Patent
active
043346677
ABSTRACT:
A low-slung carriage-mounted lifting jack has a long tubular handle for projecting the jack beneath a conventional automotive vehicle. The handle is tiltably mounted on the carriage and simultaneously serves as a pump handle for pumping hydraulic fluid from a reservoir to a ram which in turn is operatively attached to an elevating linkage for lifting the vehicle. A pump, for operation of which the handle is tiltably mounted on the carriage, delivers hydraulic fluid under pressure from the reservoir to the ram. To release hydraulic pressure in the ram, for lowering the linkage and returning the fluid to the reservoir, there is a release valve with a release pin projecting adjacent the end of the handle which is tiltably mounted on the carriage. Within the handle is a rotatably mounted rod extending throughout the length of the handle, and on the end of the rod is a cam in operating engagement with the release pin. The cam moves the release pin to release, or lowering, position from which it is returned by hydraulic pressure when the cam action is discontinued.
REFERENCES:
patent: 3656709 (1972-04-01), Shufflebarger et al.
patent: 3757612 (1973-09-01), Schaefer
patent: 4277048 (1981-07-01), Okuda
Beehler Vernon D.
Norco Industries Inc.
Watson Robert C.
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