Torsional vibration damper

- Tesma International, Inc.
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Claims

Referenced Cited
U.S. Patent Documents
4262553 April 21, 1981 Bremer
4764152 August 16, 1988 Jorg et al.
4781659 November 1, 1988 Gebhardt
4794816 January 3, 1989 Serizawa et al.
4815332 March 28, 1989 Serizawa et al.
4881426 November 21, 1989 Serizawa et al.
5030172 July 9, 1991 Green et al.
5057059 October 15, 1991 Sidwell et al.
5129864 July 14, 1992 Quintus et al.
5148719 September 22, 1992 Ampferer et al.
5231893 August 3, 1993 Sisco et al.
5405296 April 11, 1995 Cerny et al.
Other references
  • Illustration of vibration damper assembly used in 1980's General Motors 6.5 liter V-8 diesel engine (Appendix Tab 1). Alleged literature from SAE Show (spring of 1991) distributed by Simpson Industries, Inc. (Appendix Tab 2). Illustration of Buick 3.8 liter V-6 engine drive pulley (allegedly marketed in the mid-1980's) (Appendix Tab 3). Illustration of design allegedly offered by the Hillsdale division of Eagle-Picher for sale to Ford Motor Company in Jan. 1992 (Design Option 1--Appendix Tab 4). Pulley assembly manufactured by ROTO-FORM for Ford 2.3 L Tempo/Topaz vehicles (between 1992-1994) (Appendix Tab 5).
Patent History
Patent number: RE35932
Type: Grant
Filed: Jul 29, 1996
Date of Patent: Oct 20, 1998
Assignee: Tesma International, Inc. (Ontario)
Inventors: Zdenek Cerny (Brampton), Michael Clark (New Market)
Primary Examiner: Roger J. Schoeppel
Law Firm: Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro LLP
Application Number: 8/687,983