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:
Oct. 24, 1995
Filed:
Dec. 15, 1993
Kevin J Schemansky, Portage, MI (US);
Jerry A Culp, Oshtemo Township, Kalamazoo County, MI (US);
Stryker Corporation, Kalamazoo, MI (US);
Abstract
A foot switch includes a base member having an upwardly facing surface, a force sensing resistor disposed on the surface and coupled electrically to a sensing circuit, and an actuating layer disposed on the force sensing resistor and the base member surface. The actuating layer has an elevated portion which is substantially centered over the force sensing resistor, the elevated portion having a convex upper surface which is a portion of a spherical surface. The sensing circuit includes a constant current source connected in series with the force sensing resistor between ground and a predetermined voltage.