Mechanical jack

Details Mechanical jack Mechanical jack

2005-08-16

2005-08-16

Ackun, Jr., Jacob K. (Department: 3723)

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

C254S124000, C254SDIG002

Reexamination Certificate

active

06929248

ABSTRACT:
A mechanical jack comprising a ratcheting gear track connected to a frame. A bell crank arm is pivotally connected to the frame. An elongate handle is rotatably connected to the bell crank arm. A gear pin is connected to the elongate handle. The gear pin is for engaging the ratcheting gear track. An elevator arm is pivotally connected to the frame. The elevator arm is slidably connected to the bell crank arm, and a lift pad is connected to the elevator arm.

REFERENCES:
patent: D109499 (1938-05-01), Pfauser
patent: 4018421 (1977-04-01), Tallman
patent: D272670 (1984-02-01), Tsujimura
patent: 4564172 (1986-01-01), Arzouman
patent: 5201494 (1993-04-01), Lundman
patent: D423750 (2000-04-01), Hung
patent: D442345 (2001-05-01), Lee et al.
patent: 6601827 (2003-08-01), Arzouman
patent: 6691983 (2004-02-01), Arzouman

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