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:
Apr. 17, 1984
Filed:
Jun. 28, 1982
James F Hartz, Indianapolis, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A power transmission having fluid actuated ratio establishing devices has a center support disposed in a cylindrical main bore of the transmission case and a plurality of elastomeric shims around the center support in an annular gap between the latter and the main bore. Each shim has a spacer portion in compression between the center support and the main bore which spacer portions exert balanced radially directed forces on the center support operative to centralize the latter in the main bore and the shims have coefficients of thermal expansion sufficiently exceeding the coefficients of thermal expansion of the case and/or the center support to maintain the spacer portions in compression throughout the operating temperature range of the transmission. In addition, one of the compressed spacer portions is interposed between a fluid supply passage in the case and a passage in the center support and has an aperture in register with the passages so that the spacer portion forms a gasket preventing fluid leakage into the gap.