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:
Jun. 13, 1989
Filed:
Sep. 01, 1987
Applicant:
Inventor:
William H Barner, Laguna Beach, CA (US);
Assignee:
Inotek-Westmoreland Joint Venture, Mission Viejo, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05G / ; F16F / ;
U.S. Cl.
CPC ...
74527 ; 7410 / ; 74110 ; 267161 ;
Abstract
The inwardly facing portions of annular springs adjacent the inner edge thereof are formed into two or more regions of predetermined angular or curved slopes and radial extent. When the peak of a shaft cam passes an annular set of ball bearings between the springs, the loaded springs unload at a rate determined by each region slope and the radial extent of the regions to consecutively drive the shaft at corresponding rates and forces. To precisely obtain the desired spring characteristics, a composite spring can be used formed from a steel spring sandwiched together with a plastic member (e.g., nylon).