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:
Jul. 19, 2005
Filed:
Aug. 11, 2003
Martin Pahrisch, Hallstadt, DE;
Ronald Beck, Thundorf-Rothhausen, DE;
Alfred Schraut, Waigolshausen, DE;
Erwin Ziegler, Gressthal, DE;
Frank Hirschmann, Niederwerm, DE;
Martin Pahrisch, Hallstadt, DE;
Ronald Beck, Thundorf-Rothhausen, DE;
Alfred Schraut, Waigolshausen, DE;
Erwin Ziegler, Gressthal, DE;
Frank Hirschmann, Niederwerm, DE;
ZF Sachs AG, Schweinfurt, DE;
Abstract
A diaphragm spring for a friction clutch includes a ring-like body area and a plurality of spring tongues arranged at the inner edge in a row in a circumferential direction and extending radially inward from the body area. Openings are formed between adjacent spring tongues, each opening having a radially outer base area, at least one of the openings being limited in the circumferential direction by a wall area having a curvature which increases as the wall proceeds from the base area.