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:
Jun. 09, 2009
Filed:
Aug. 04, 2005
Jun Ishikawa, Niigata-ken, JP;
Yoshinori Fujitani, Niigata-ken, JP;
Satoshi Yamada, Niigata-ken, JP;
Jun Ishikawa, Niigata-ken, JP;
Yoshinori Fujitani, Niigata-ken, JP;
Satoshi Yamada, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A driver includes an electromechanical energy transducer deformed by applying and removing voltage, a supporting member having the electromechanical energy transducer joined thereto for transmitting movement of the electromechanical energy transducer resulting from the deformation to the supporting member, and a movable body disposed in an inner peripheral portion of the supporting member. A deformation speed of the electromechanical energy transducer when a state change occurs from a prior-to-deformation state of the electromechanical energy transducer to an after-deformation state of the electromechanical energy transducer differs from a deformation speed of the electromechanical energy transducer when state change occurs from the after-deformation state to the prior-to-the deformation state. When the electromechanical energy transducer is deformed at the lower of the deformation speeds, frictional force generated between the movable body and the inner peripheral portion moves the movable body and the supporting member.