Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2007-11-09
2008-12-09
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S309000, C310S318000, C310S328000, C310S363000
Reexamination Certificate
active
07462974
ABSTRACT:
An inertial driving actuator includes a fixing member, a moving element that is fixed to the fixing member and generates a small displacement by extension and contraction, an oscillation substrate that is fixed to the moving element and is moved linearly reciprocally by the small displacement, and a moving body that is moved by reciprocal movement of the oscillation substrate. The moving body has a first driving electrode. The oscillation substrate has a second driving electrode and a detection electrode, the area of the facing portion of the detection and first driving electrodes changing continuously as the moving body moves. The actuator further includes a frictional force controller that controls a frictional force generated between the oscillation substrate and moving body, and a position detector that detects the position of the moving body from the electrostatic capacitance of the facing portion of the first driving and detection electrodes.
REFERENCES:
patent: 6219274 (2001-04-01), Shimazawa et al.
patent: 7294950 (2007-11-01), Yoshida
patent: 2007/0241640 (2007-10-01), Matsuki
patent: 2003-185406 (2003-07-01), None
Gordon Bryan P
Olympus Corporation
Schuberg Darren
Scully , Scott, Murphy & Presser, P.C.
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