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:
Mar. 31, 1998
Filed:
Oct. 11, 1995
Hans-Wilhelm Wienholt, Dortmund, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
A hydrokinetic torque converter is provided with a lockup clutch which comprises a piston which can be displaced in the axial direction and can be connected with the converter housing by means of at least one friction lining. The piston, on its side facing the converter housing, defines a chamber in which, when the lockup clutch is active, a pressure is applied which is lower than the pressure of the converter circuit. In the vicinity of the friction surface, there is at least one depression for the flow of hydraulic fluid from the converter circuit. The depression empties in the vicinity of the radially inner end of the friction lining into the chamber, and has at least one connection to at least one recess in the piston, whereby the recess is designed to generate a pressure reduction with respect to the pressure in converter circuit, and is designed with a smaller cross section area than the connection or the depression.