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:
Nov. 18, 1997
Filed:
Dec. 20, 1996
Applicant:
Inventor:
Yongbin Yuan, Winchester, VA (US);
Assignee:
Cooper Industries, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73-9 ;
Abstract
Evaluation apparatus for detecting the onset parameters of friction, wear and groan and squeal noise characteristics associated with a specimen of a particular brake friction material composition is provided with a movable apparatus table which carries both a variable-speed electric motor that drives a brake rotor and that has a near-zero speed capability and a reversible electric motor that may be selectively and independently actuated to advance the brake rotor into friction contact with a friction material specimen and with a normal-force that correlates to the output torque of the reversible electric motor.