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:
Aug. 11, 1987
Filed:
Apr. 30, 1986
Aki Tanaka, Northridge, CA (US);
David E Landis, Oxnard, CA (US);
P. L. Porter Company, Woodland Hills, CA (US);
Abstract
An infinitely positionable backrest lock for a recliner seat has an upper plate hinged to a lower frame, and a gear train mounted to the lower frame and drivingly engaging the upper plate. The gear train includes a drum surface on which is wound a brake spring normally gripping the drum against rotation for locking the upper plate against pivotal movement. Positive locking of the drum and gear train is assured by an auxiliary spring and associated lever mechanism acting on the brake spring for increasing the frictional engagement between the brake spring and drum surface by more tightly winding the brake spring about the drum. Fail safe operation is assured by a bolt element spring loaded towards interlocking engagement with a toothed periphery of the drum wheel in the event of slippage between the drum surface and brake spring.