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. 12, 1985
Filed:
Jun. 18, 1984
Erkki A Koivunen, Livonia, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A pressure compensating mechanism for a dual control piston variable drive pulley has a central chamber disposed between the control pistons. The central chamber is filled with fluid from one of the control passages and is open to exhaust through a controlled restriction. The fluid in the central chamber increases in pressure with increased rotational speed of the pulley to compensate for the centrifugal pressure buildup on one of the control pistons. The controlled restriction establishes the base pressure in the central chamber so that the resultant pressure in the central chamber compensates for centrifugal forces in excess of the centrifugal effect on one of the control pistons thereby compensating, at least partially, for the centrifugal pressure effect on the other of the control piston.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile