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:
Nov. 02, 1976
Filed:
May. 01, 1975
Donald F Walker, Peoria, IL (US);
Roger O Bjerk, Edelstein, IL (US);
Harold C Powers, Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A long-lived, unitized seal biasing spring assembly for use in rotary mechanisms such as rotary engines. The rotary mechanism with which the invention is to be used includes an operating chamber and a rotor within the chamber. At least one seal retaining groove is provided in the rotor and the seal is retained in the groove and extends partially out of the groove into sealing engagement with the chamber. A unitized, multi-leaf spring assembly made according to the invention is disposed in the groove and engages the seal to bias the seal into sealing engagement. Through the use of a unitized construction, assembly is facilitated while the use of a multi-leaf biasing spring arrangement dramatically reduces spring stress substantially prolonging the useful life thereof.