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. 22, 1994
Filed:
Dec. 06, 1993
Kynan L Church, Ceresco, MI (US);
David W Deppe, Marshall, MI (US);
Richard L Madden, Marshall, MI (US);
Nandakumar Srinivasan, Marshall, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A hydraulic belt tensioner operating on pressurized lubricating oil in an internal combustion engine. The tensioner includes a ratchet mechanism which locks the output member of the tensioner in a fixed position when the engine is not operating and which is disengaged when the engine is operating and the lubricating oil is pressurized. A seal is provided to prevent oil from escaping from the unit. The invention further includes slots formed in a plunger element of the tensioner which are effective to dissipate air which tends to become entrapped under the plunger when the engine is initially started.