The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 1988
Filed:
Apr. 29, 1987
Gregory F Exner, Woodhaven, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A jack assembly which is adapted to engage a side frame of an automotive vehicle for the purpose of raising and lowering the same relative to its adjacent ground surface comprises a base for engaging the ground surface and which has a pair of upwardly extending sides having horizontally disposed slots therethrough, a main support link having one end pivotally connected to the sides of the base via a pivot means extending through the slots and having its other end pivotally connected to a screw nut means, a lift arm having one end pivotally connected to the main support link and its other end connected to a bearing means rotatably supporting a screw which is also threadably engaged with the screw nut means carried by the main support link, a positioning link having one end pivotally connected to the base and its other end pivotally connected to the lift arm and follower links having one end pivotally connected to the positioning link and its other end pivotally connected to the pivot means connecting the main support link to the base, and with the length of the positioning link and following links and the locations of their respective pivotal connections with the lift arm and positioning link being such that the bearing means of the lift arm follows an arc which is the natural arc of the frame or side body portion of the vehicle when used to raise and lower the same while simultaneously the follower link causes the first pivot means to slide in the slots and horizontally move the main support link so that its pivotal connection with the base is always located directly beneath the side frame of the vehicle being raised or lowered when the screw nut means is rotated.