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:
Feb. 11, 1992
Filed:
May. 28, 1991
Edward J Bojas, Marshall, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A viscous coupling (11) is provided for use as a by-pass element in a torque converter (T). The coupling includes a body member (13) having a body hub portion (25) and a cover member (15) having a cover hub portion (35). The body and cover hub portions are journalled on the outer surfaces (53,57) of a clutch hub portion (41) by means of a pair of identical bushing (59). Each bushing defines on its outer surface a fluid passage (79) including a restricted flow orifice (81). The restricted orifice results in a substantial pressure drop from a high pressure chamber (73) to a seal chamber (70). The cover hub portion (35) defines a counterbore (85) which communicates with the fluid passage (79) to by-pass the restricted orifice (81), such that the seal chamber (70) is maintained at substantially the pressure of a downstream, low pressure chamber (71).