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:
Mar. 17, 1992
Filed:
Aug. 21, 1991
Applicant:
Inventors:
Gregory M Calico, Conway, AR (US);
Judson D Spillyards, North Little Rock, AR (US);
Ronald L Hill, Conway, AR (US);
Assignee:
FMC Corporation, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B66F / ;
U.S. Cl.
CPC ...
254 / ; 254122 ;
Abstract
A scissor jack of the type which is mountable on and usable in conjunction with a conventional automotive vehicle lift to permit a selected axle of the vehicle to be elevated relative to the lift. The invention provides a gravity activated locking mechanism which includes a plurality of lock keys of different widths. The keys fall individually into a lock position as the jack rises incrementally in height, to prevent unintended lowering of the jack at any height or any time during the lifting process.