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:
Sep. 19, 1989
Filed:
Mar. 28, 1988
Applicant:
Inventors:
Robert L Williamson, Santa Barbara, CA (US);
Kenneth M Holden, Santa Barbara, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66F / ;
U.S. Cl.
CPC ...
254124 ;
Abstract
The present invention defines a power lift-assist apparatus that includes a base platform and a load-support platform adapted to move in parallel relation to the base platform. Mounted to the base platform is a pneumatic motor comprising a substantially stationary piston formed with an internal pressure chamber therein and a slidable cylinder which is provided with a pair of cam rollers that are positioned to engage respective cam recesses formed in a carriage-lift framework whereby the load-support framework is activated from a retracted position to a fully extended position.