Implements or apparatus for applying pushing or pulling force – Single throw lever – Mechanically actuated
Reexamination Certificate
1999-10-05
2001-02-20
Gerrity, Stephen F. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Single throw lever
Mechanically actuated
C254S124000, C254SDIG001
Reexamination Certificate
active
06189865
ABSTRACT:
The invention relates to a jack for lifting a vehicle, the jack comprising a base for placing on the ground and an elevator mechanism which bears against the base via a leg, the leg being linked to the base by a device so that the leg can pivot on the base about a horizontal axis and can slide on the base along the horizontal axis.
BACKGROUND
The ability of the elevator device to slide longitudinally and to pivot relative to the base limits parasitic forces tending to twist the jack while the vehicle is being raised.
An embodiment of such a jack is described, for example, in publication DE-U-8 702 290.
The present invention provides a jack that is simpler to manufacture.
SUMMARY
The jack of the invention is characterized in that:
the base has a longitudinal rig with a rounded top projecting above the base, the rib defining the pivot axis;
the leg is provided at its bottom end with a slide made of a block of synthetic organic material engaged in the bottom end and held to the leg, the slide being shaped so as to be capable of fitting astride the rib of the base with the ability to pivot on the rib about the axis and to slide along the rib; and
a link device is established between the leg and the base to hold the slide on the rib.
An embodiment of a jack of the invention as defined above is described below, this embodiment also having other characteristics which form portions of the invention, in isolation or in combination.
In this embodiment, the link device has a shaft which passes through the leg and/or the slide parallel to the axis and which is attached to the base so as to be capable of pivoting about the axis.
REFERENCES:
patent: 3746307 (1973-07-01), Yamazaki
patent: 4720081 (1988-01-01), Exner
patent: 5118083 (1992-06-01), Metzen
patent: 5275378 (1994-01-01), Alten
patent: 5988594 (1999-11-01), Gill
patent: 6022001 (2000-02-01), Palacio et al.
Framboisier David
Ruffie Gilles
Adwest Bowden Frances S.A.
Blakely & Sokoloff, Taylor & Zafman
Gerrity Stephen F.
Wilson Lee
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