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:
May. 18, 1993
Filed:
Dec. 18, 1991
Applicant:
Inventor:
Clyde R Porter, Los Angeles, CA (US);
Assignee:
P. L. Porter Company, Woodland Hills, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F / ;
U.S. Cl.
CPC ...
267221 ; 188-111 ; 188300 ; 188314 ; 267 6412 ; 267225 ;
Abstract
A hydraulic positioner for seats includes a cylinder and piston structure with a piston rod secured to the piston and extending from the cylinder. A reservoir is provided in the cylinder by a gland jointly biased by a first spring located within the cylinder and a second spring which also urges the piston rod to an extended position. A sleeve is movable by the gland for visual indication of the hydraulic fluid in the cylinder.