Implements or apparatus for applying pushing or pulling force – Hoisting truck – Platform type
Patent
1992-01-10
1994-02-08
Kisliuk, Bruce M.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Platform type
254 93L, 254 93H, 254 2C, 60478, 91457, B60P 106
Patent
active
052843211
ABSTRACT:
A hydraulic jack movably supported by a plural casters has a vertically extending hydraulic cylinder with telescoping piston rods, has a load supporting frame at an upper end of the innermost piston rod, and has a reservoir partially filled with hydraulic fluid. A single foot pedal is pivotally supported on the jack, and is movable between first and second positions through a center position. A hydraulic valve arrangement is responsive to movement of the actuating member toward its first position for permitting fluid flow from the reservoir to the hydraulic cylinder and is responsive to movement of the actuating member toward its second position for permitting fluid flow from the hydraulic cylinder to the reservoir. A kicker lever supported for pivotal movement about the same axis as the actuating member is operatively coupled to the actuating member for movement therewith by two springs, and can actuate an air valve. In response to movement of the actuating member toward its first position, the kicker lever causes the air valve to supply pressurized air to the reservoir, and in response to movement of the actuating member toward its second position the kicker lever causes the air valve to vent pressurized air from the reservoir.
REFERENCES:
patent: 2165095 (1939-07-01), Frechette
patent: 3757523 (1973-09-01), Resuggan
patent: 4703916 (1987-11-01), Hung
Owatonna Catalog; "Hydraulic Shop Forcing Presses", pp. 59-62; Owatonna Tool Company, Owatonna, Minn.
Equipment and Supplies for Industry, Farm & Home, p. 1102.
Kisliuk Bruce M.
Meyer Hydraulics Corporation
Morgan Eileen P.
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