US Patent No. 9,143,059


Patent No. 9,143,059
Issue Date September 22, 2015
Title Vibration Wave Motor
Inventorship Satoshi Tsuchiya, Inagi (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,143,059

1. A vibration wave motor comprising:
a vibration member including an elastic body joined with an electric-mechanical energy converter;
a moving member contacting the vibration member, the vibration member and the moving member having an annular shape;
a friction member between the vibration member and the moving member; and
a centrifugal fan provided on at least one of an outer peripheral portion and an inner peripheral portion of the vibration
member and the moving member,

wherein the centrifugal fan is arranged to rotate integrally with the moving member, and
wherein, in a cross-section including an axis of the annular shape, the centrifugal fan includes a portion which is opposed
to the friction member, a part of the vibration member, and a part of the moving member.