Implements or apparatus for applying pushing or pulling force – Special engaging elements – Sharing props
Patent
1981-05-06
1983-09-06
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Special engaging elements
Sharing props
254DIG1, 254DIG4, 254101, B66F 300
Patent
active
044024878
ABSTRACT:
A jack for lifting unbalanced loads such as automobiles, comprises a base having a raised portion thereon with a recess therein to accommodate the base of a jack column. The recess for the jack column is offset on the base and oriented to place a major portion on the base beneath the jack saddle during operation in order to increase stability. A substantially circular collar is mounted about the jack column at a predetermined distance from the base, said collar being supported by a plurality of spaced flexible legs pivotally mounted to the base at one end and curving upwardly to a removable mounting at the collar to prevent column tilt. The jack also includes a saddle assembly having a movable saddle with a protruding portion to engage an aperture in the load which is oriented to approximate the direction of lift point shift. The saddle is free to move perpendicular to the column against the action of a spiral spring when a load is applied and its rotational motion about the column is resiliently restrained by spring means. Thus, the two elements of lift point shift, magnitude and direction, cause compensating movements in the saddle assembly to increase stability, and thereby improve functional reliability and operational safety.
REFERENCES:
patent: 785455 (1905-03-01), Vigie
patent: 995583 (1911-06-01), Willour
patent: 2060543 (1936-11-01), White
patent: 2119028 (1938-05-01), Schmidt et al.
patent: 2198270 (1940-04-01), Maranville
patent: 2909358 (1959-10-01), Southerwick
patent: 2951679 (1960-09-01), Volkert
patent: 3765650 (1973-10-01), Eisenhauer
patent: 4025053 (1977-05-01), Stickle
patent: 4084791 (1978-04-01), Margueratt
patent: 4101036 (1978-07-01), Craig
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