Mechanical jack

Details Mechanical jack Mechanical jack

1991-12-20

1992-11-10

Swann, J. J.

Implements or apparatus for applying pushing or pulling force

Single throw lever

Mechanically actuated

254 8B, B66F 3300

Patent

active

051617820

ABSTRACT:
A mechanical jack comprising a base, on which a fixed frame is fixed. The fixed frame is substantially up-standing, slightly inclining toward one side with a supporting frame attached thereon to maintain the fixed frame in its inclined position. A moveable frame with one end thereof pivotally attached on the fixed frame is rotatable with respect to the fixed frame about the pivot. A threaded rod, which has a threaded portion engaging with an inner-threaded block pivotally mounted on the other end of the moveable frame by means of a replaceable bearing element and a smooth portion running through and secured on a pivot mounted on the fixed frame, retracts and extends, when rotated about the central axis thereof, the moveable frame with respect to the fixed frame so that heighten and lower a vehicle support attached on the moveable frame.

REFERENCES:
patent: Re30640 (1981-06-01), Keilholz
patent: 2183427 (1939-12-01), Hou
patent: 3693937 (1972-09-01), Yamazaki
patent: 4919392 (1990-04-01), Minuto
patent: 5033717 (1991-07-01), Symon

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