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:
Jan. 03, 1989
Filed:
May. 26, 1987
Metin M Durum, Elmhurst, IL (US);
Borg-Warner Automotive, Inc., Troy, MI (US);
Abstract
A torsional coupling or resilient damper assembly for a friction clutch or torque converter lock-up clutch which is formed of a plurality of spiral spring plates or discs that are secured together as a unit with an outer peripheral ring and an inner ring for each disc joined together by one or more spiral spring members formed by one or more spiral slots extending between the inner and outer rings. The coupling is formed of a stack of plates wherein the slots in the plates are axially aligned and the forces in the plates are balanced when two or more spiral slots are utilized. If a single spiral slot is provided in each disc, the forces are balanced by alternate plates being reversed or all plates being positioned identically but phased through angles divisible into 360.degree.. Different embodiments of spiral spring discs may be combined in a single assembly.