Alignment and release mechanism for two-part jack system

Details Alignment and release mechanism for two-part jack system Alignment and release mechanism for two-part jack system

1989-05-09

1990-10-02

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

254 89R, B66F 504

Patent

active

049602640

ABSTRACT:
A two-part jack system includes a mechanical jack stand with a ratchet mechanism and a ratchet release, and a power unit that may be selectively aligned with and attached to the jack stand for raising or lowering it. A unitary control mechanism carried by the power unit is adapted to selectively lock the power unit in an aligned position relative to the jack stand, and also to selectively release the ratchet release of the jack stand. A locking mechanism is carried in part by the jack stand and in part by the power unit. The unitary control mechanism has three different operating positions. In one operating position the locking mechanism is kept locked while the ratchet release is left in an unreleased state; in a second operating position the locking mechanism is kept locked while the ratchet release is released; and in the third operating position the locking mechanism is held in an unlocked condition while the ratchet release is left in an unreleased state. The power unit has an operating handle, and a single lever which operates the unitary control mechanism is carried on the power unit operating handle for convenient access and easy control by a human operator.

REFERENCES:
patent: 2624543 (1953-01-01), Jackson
patent: 4241899 (1980-12-01), Kaneko
patent: 4251056 (1981-02-01), Maniglia
patent: 4289299 (1981-09-01), Kameda
patent: 4462569 (1984-07-01), Arzouman

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