Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Patent
1984-06-20
1985-12-17
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
B66F 504
Patent
active
045588465
ABSTRACT:
A mobile power unit for a jacking system having extendible members is disclosed. The unit includes a frame having a pair of lifting members each having an extension member mounted therein and a pair of tie-rods each connected between the frame and the extension members to move the extension members progressively forward as the lifting members are raised. A pair of guides each having a slot are mounted on each of the lifting members to maintain the top of a jack stand at a constant angular relation with the extension members. The device also includes an alignment mechanism having a pair of curved springs each mounted on one of two arms of the frame and a pair of associated protuberances each mounted on opposite parallel walls of the jack stand to align the jack stand at a predetermined location on the frame. A release mechanism for releasing the jack stand has two cams each mounted on one of the two arms of the frame and a pair of pins each mounted to extend outwardly from opposite ends of the jack stand. The cams are normally spring-biased in their non-engaging position.A control cord is connected to each of the cams to rotate them to engage the associated pin to lower the jack stand.
REFERENCES:
patent: 1505443 (1924-08-01), Stone
patent: 1750663 (1930-03-01), Dart
patent: 3834669 (1974-09-01), Reid
patent: 3850419 (1974-11-01), Craig
patent: 4066243 (1978-01-01), Johnson
patent: 4123038 (1978-10-01), Meyers
patent: 4177978 (1979-12-01), Warsaw
patent: 4289298 (1981-09-01), Kameda
Arant Gene W.
Safe-T-Jack, Inc.
Watson Robert C.
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