Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Patent
1997-06-18
1999-03-09
Scherbel, David A.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
B60P 148
Patent
active
058789960
ABSTRACT:
The present invention relates to a lifting jack with safety and release system for lifting an object, comprising: a main body; a driving system; a support system, hingedly mounted on the main body and undergoing a raising and a lowering movement, as driven and released by the driving system; a safety system, further comprising a ratchet, mounted on the main body, a pawl, which during the raising movement engages with the ratchet for blocking any unintended lowering of the support system, and a lever with a rear end and with a front end below the pawl, for disengaging the pawl from the ratchet by lowering its rear end; and a release system, further comprising a catch, hingedly mounted on the main body, having a nose for engaging with the rear end of the lever, and a spring, pulling the catch towards the rear end of the lever; wherein, for lowering the support system, the rear end of the lever is pressed down manually and then held by the nose of the catch, such that the pawl stays disengaged from the ratchet automatically, while the support system is lowered.
Halpern Bnejamin M.
Scherbel David A.
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