Implements or apparatus for applying pushing or pulling force – Multiple lifters
Patent
1993-11-01
1994-10-11
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Multiple lifters
254111, 254133R, 254DIG3, B66F 712
Patent
active
053540344
ABSTRACT:
A foldable jack system for lifting a car during the changing of a tire comprising a lower support bar formed of separable halves, each half having an intermediate end with hinge attachments formed of spaced holes mutually alignable to receive a bolt for coupling the halves, each half having a support block at its exterior end with a vertical recess at its upper end and a support plate at its lower end; an upper support bar formed of separable halves, each half having an interior end with a hinge attachment formed of spaced holes mutually alignable to receive a bolt for coupling the halves, each half having a jack block at its exterior end with a vertical aperture extending therethrough; a hook extension secured to each half of the upper support bar; a pair of rigid bars, each rigid bar having a lower end received in the recess of its associated support block and a series of teeth facing in a common direction; activating mechanisms including a jack crank for each jack block for raising and lowering the jack blocks, upper support bars, slide adapter and a common crank coupling the jack cranks for concurrent operation upon the actuating mechanism.
REFERENCES:
patent: 1206361 (1916-11-01), Parker
patent: 2012430 (1935-08-01), Kuhlman
patent: 2536550 (1951-01-01), Hughes
patent: 3881689 (1975-05-01), Bury et al.
patent: 4082250 (1978-04-01), Allmon et al.
patent: 4147267 (1979-04-01), Mai
patent: 4375934 (1983-03-01), Elliott
patent: 4479634 (1989-10-01), Blatz
Colitz, Jr. Michael J.
Watson Robert C.
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