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:
Oct. 24, 2006
Filed:
Apr. 09, 2004
Kaishi Ohashi, Tokyo, JP;
Takashi Maeno, Tokyo, JP;
Kenjiro Takemura, Tokyo, JP;
Tatsuya Koyama, Tokyo, JP;
Kaishi Ohashi, Tokyo, JP;
Takashi Maeno, Tokyo, JP;
Kenjiro Takemura, Tokyo, JP;
Tatsuya Koyama, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A mechanism for mechanically coupling a driving source and a driven member. The mechanism includes a first member coupled to the driving source and a second member coupled to the driven member. A resilient member exerts a force to bring the first and second members into pressure contact at a contact surface. A vibration is excited in the contact surface of the first member to produce a levitation force, based on an ultrasonic levitation, acting upon the second member. Frictional force between the first member and the second member is changed depending on the levitation force, thereby changing power transmitted between the first member and the second member.