Jack

Details Jack Jack

1986-09-17

1989-04-18

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Single throw lever

Lazy tongs

B66F 300

Patent

active

048220043

ABSTRACT:
A jack as provided for use with a lifting device having two parallel support platforms. The jack has base and top elements, and a scissor mechanism between them. Two air piston and cylinder assemblies are disposed vertically and actuate the scissor mechanism. The jack is mounted for free movement along the length of a lifting device. The piston and cylinder assemblies can be connected to mid points of the arms of the scissor mechanism on either side of it. This provides a compact assembly with the piston and cylinder assemblies working at an optimum angle. The base element of the jack includes openings for the piston and cylinder assemblies.

REFERENCES:
patent: 219850 (1879-09-01), Drian et al.
patent: 2909358 (1959-10-01), Southerwick
patent: 2945551 (1960-07-01), Annin et al.
patent: 3329240 (1967-07-01), Harwood et al.
patent: 4092011 (1978-05-01), Luebke
patent: 4347916 (1982-09-01), Schroder
patent: 4447042 (1984-05-01), Masui
patent: 4491201 (1985-01-01), Mountz
patent: 4659066 (1987-09-01), Van Lierop

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