Land vehicles – Wheeled – Attachment
Patent
1982-07-07
1984-05-22
Blix, Trygve M.
Land vehicles
Wheeled
Attachment
212189, 254 93A, B66C 2378, B60R 918, B66F 324
Patent
active
044497342
ABSTRACT:
A mechanical locking outrigger hydraulic jack for an outrigger assembly for use with cranes and the like includes vertically disposed cylindrical fixed and movable members, the fixed member being secured to a vertically disposed external sleeve. A variable extension chamber is defined by the interiors of the fixed and movable members. A variable retraction chamber is defined exteriorly of the fixed member and interiorly of the movable member. Valve means permit selective raising and lowering of the movable member. A locking nut threadedly engages the threaded exterior of the movable member and is engagable with an external surface of the locking sleeve to mechanically lock the movable member in an extended, lowered position.
REFERENCES:
patent: 2483312 (1949-09-01), Clay
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patent: 4174095 (1979-11-01), Chipman
patent: 4318550 (1982-03-01), Jacobsen
patent: 4330104 (1982-05-01), Klok
Blix Trygve M.
Hydra-Jack, Inc.
Johnson R. B.
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