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:
Aug. 14, 1984
Filed:
Oct. 14, 1981
Jean-Pierre Chatelin, Franconville, FR;
Valeo, Paris, FR;
Abstract
A diaphragm spring for use in a motor vehicle clutch of a variable pitch drive pulley is disclosed. The diaphragm spring is of the type comprising a Belleville washer peripheral portion and a central portion divided into radial fingers separated by radial slots. Apertures alternate with the roots or radial outer ends of the radial fingers and open radially into the slots. These apertures consist of relatively larger area main apertures and relatively smaller area intermediate apertures. The radially outer edges of all the apertures lie along the same circumference of the diaphragm spring. The diaphragm spring is devoid of ribs. The diaphragm spring is rigidified along the circumference by the extra material formed around the smaller intermediate apertures, while maintaining a peripheral portion of constant radial extent throughout.