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:
Jun. 02, 1987
Filed:
Jul. 22, 1985
Harald Raab, Schweinfurt, DE;
Hilmar Gobel, Grafenrheinfeld, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
The clutch disc comprises for torsional vibration damping a spring system (35) dimensioned for operation under load and a spring system (51, 53) dimensioned for operation in idling. An idle motion device (5, 7) ensures that in the case of relative rotation angles in the idling operation the idling spring system (51, 53) exclusively is effective. In order to avoid jumps in the spring characteristic of the spring systems in the transition from idling operation to under-load operation, the idling spring system (51, 53) comprises at least one spring (53) which is brought into action within the rotation angle range of the idle motion device (5, 7) on approach to the under-load range and increases the spring rating of the idling spring system. Thus clutch and gear noises in this transitional range are avoided.