Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Patent
1983-05-13
1985-04-30
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
B60P 148
Patent
active
045139504
ABSTRACT:
Disclosed is a garage jack for lifting an automobile provided with an arm lock mechanism which defines two angular positions of the lifting arm so that the lifting arm is prevented from inadvertently falling, for instance, due to loss of hydraulic pressure, below the two annular positions. Since there are two such positions, the safety to the user of the garage jack is enhanced. Furthermore, the arm lock mechanism is highly simple with two engagement means provided on the lifting arm and corresponding two pawls on a rotatable shaft. This arm lock mechanism may be readily deactivated by securing a lock/unlock bar. Additionally, the garage jack is provided with a pair of composite wheels each comprised of a steel wheel and an elastic wheel so that the garage jack may be moved from one place to another very quietly thanks to the elastic wheel and may follow the motion of its lifting head when a load is applied to the lifting head and the elastic wheel has yielded under the load thanks to the steel wheel.
REFERENCES:
patent: 4251056 (1981-02-01), Maniglia
patent: 4289299 (1981-09-01), Kameda
Watson Robert C.
Yasui Sangyo Co. Ltd.
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