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:
May. 15, 1990
Filed:
May. 03, 1989
Ippei Sawayama, Machida, JP;
Masayuki Jinnai, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A vibration wave motor which produces a relative movement between a vibrator and a member which is in contact with the vibrator via friction surfaces by means of a traveling vibration wave produced in the vibrator. In the motor, a friction surface of either one of the vibrator and frictional member is made of a material subjected to a hard alumite processing, and at least a friction surface of another one of the vibrator and frictional member is made of an ultrahard material consisting of a nickel-phosphorus-base alloy which contains at least one kind of material selected from the group consisting of silicon carbide, boron carbide, titanium boride and boron nitride.