Power unit for use with a jack stand that is convertible...

Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever

Reexamination Certificate

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Details

C254S00200C, C254S0930HP

Reexamination Certificate

active

06986503

ABSTRACT:
A power unit comprises a rectangular chassis having a forward end and a rearward end and including a pair of parallel lift arms having rearward ends slidably mounted along the rearward end of the chassis, and a pair of connecting arms having forward ends pivotally mounted at the forward end of the chassis and having rearward ends pivotally mounted near the mid point of the lifting arms. The power unit further includes an actuator mounted at the rearward end of the chassis and attached near the mid point of the lift arms for translating the rearward ends of the lifting arms for raising and lowering the forward ends of the lift arms. The forward ends of the lift arms are typically for use with the jack stand for raising and lowering the jack stand, and are alternatively further for use with a lift bridge. A lift bridge is positionable on the forward ends of the lift arms whereby the power unit is operable directly for use as a load-lifting jack without the lift bridge; and the bridge is further displaceable from the forward ends of the lift arms whereby the power unit is operable for use with the jack stand.

REFERENCES:
patent: 5181821 (1993-01-01), King, Sr.
patent: 6199826 (2001-03-01), Nix
patent: 6416039 (2002-07-01), Pietrusynski
patent: 6435477 (2002-08-01), Brunnhoelzl

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