Arm unit for use in pantograph type jack

Details Arm unit for use in pantograph type jack Arm unit for use in pantograph type jack

1986-11-25

1988-03-22

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Single throw lever

Mechanically actuated

B66F 312

Patent

active

047323663

ABSTRACT:
An arm unit for use in a pantograph type jack wherein a main driving cam having an effective cam face constituted with an arc of a circle is formed to one side plate at the mounting end of a U-cross sectioned arm on the side of a bearing member with the effective cam face being protruded forwardly and upwardly from the mounting hole for the shaft bearing member, whereas a driven cam with a relatively moderate and long cam face different from the shape of the main driving cam is formed to the other of the side plates such that, when a pair of opposed arms is an identical shape pivoted to the bearing member are rotated in the directions opposing to each at an equal angular velocity, the main driving cam and the driven cam for each of the arms are faced and brought into engagement under contact with each other.

REFERENCES:
patent: 4025054 (1977-05-01), Yamuzaki

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