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. 28, 1992
Filed:
May. 24, 1991
David S Seiz, St. Paul, MN (US);
Larry Eldridge, Dayton, OH (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A friction member which is suitable for use as a friction facing member in a transmission is provided. the friction member includes a uniform density heat resistant paper, a first layer of thermoset polymeric binder coated over and at least partially impregnated into one major surface of the paper, granular carbon friction particles uniformly distributed over and partially imbedded in the exposed surface of the first layer and a second layer of thermoset binder over the first layer and partially imbedded granular friction particles which coats without obscuring the granular friction particles. The friction member is made by applying a coating if liquid thermosettable binder filled with carbon particles to one major surface of the paper, supporting the coated paper and a movable carrier, applying a uniform layer of carbon friction particles over the binder layer, at least partially curing the binder layer, applying a second coating of thermosettable binder material over the carbon particles and curing the coatings until the binder material is thermoset.