Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-04-15
2009-12-15
Dougherty, Thomas M (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S012060
Reexamination Certificate
active
07633208
ABSTRACT:
A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The vibration friction portion is made of a material having a vibration transfer rate of 4900 meters/second or more. The moving portion is made of a material which has a vibration transfer rate of 4900 meters/second or more and which is different from that of the vibration friction portion.
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U.S. Appl. No. 12/082,939, filed Apr. 15, 2008, Entitled “Driving Device Capable of Obtaining a Stable Frequency Characteristic” Inventor: Takahashi et al.
U.S. Appl. No. 12/082,947, filed Apr. 15, 2008, Entitled “Driving Device Capable of Improving a Shock and Vibration Resistance Thereof” Inventor: Nishiyama et al.
U.S. Appl. No. 12/148,252, filed Apr. 17, 2008, Entitled “Driving Device Having Suitable Stationary Member as Material” Inventor: Yamada et al.
U.S. Appl. No. 12/148,253, filed Apr. 17, 2008, Entitled “Method of Driving a Driving Device” Inventor: Tanaka et al.
U.S. Appl. No. 12/148,257, filed Apr. 17, 2008, Entitled “Driving Device Capable of Reducing Height Thereof” Inventor: Yamada et al.
U.S. Appl. No. 12/148,793, filed Apr. 22, 2008, Entitled “Position Detecting Device Capable of Improving Detection Accuracy” Inventor: Tanaka et al.
Extended European Search Report dated Sep. 9, 2008 issued in European Application No. 08154985.9-2213 (which is a counterpart of related U.S. Appl. No. 12/148,793).
Extended European Search Report dated Sep. 1, 2009 (8 pages), issued in counterpart European Application Serial No. 08154734.1.
Nishiyama Takahiko
Takahashi Soumei
Tanaka Toyoki
Yamada Tsukasa
Dougherty Thomas M
Frishauf Holtz Goodman & Chick P.C.
Mitsumi Electric Co. Ltd.
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