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. 26, 1993
Filed:
Jul. 09, 1991
Go Yasuda, Tokyo, JP;
Akira Wada, Tokyo, JP;
Nisshinbo Industries, Inc., Tokyo, JP;
Abstract
A friction member, such as a brake lining, disk pad or clutch facing, may be molded using a method in which the mold for the member is vibrated at a frequency and with amplitudes that are selected to imbue the friction member with desired physical properties, such as a predetermined specific gravity and porosity. The materials forming the friction member may be placed in a mold and the pressure on the mold increased and relaxed a predetermined number of times. Each time the pressure on the mold is increased, the mold is vibrated at the desired frequency and with the desired amplitude to achieve the desired physical properties. Upon completeion of the periodic vibration of the mold, the material in the mold may be subjected to a predetermined rated pressure for a predetermined period of time without vibration.