Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-10-04
2005-10-04
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
06952071
ABSTRACT:
The present invention relates to a piezo-electric drive consisting of a stator (2) and a rotor (4). It is characterized by the following features:It is provided that the stator (2a) has a cylindrical piezo-element (2) that has at least two electrodes and at least one contact surface (2b) and a first resonant frequency, the rotor has a mechanical transfer element (1) between the piezo-element (2) and the rotor (4), which transfer element (1) has elevations (3) that point at a particular angle into the direction of the contact surface (2b) of the piezo-element (2) and under pretension are adjacent to the contact surface (2b) and that have a second resonant frequency, and said piezo-element (2a) is provided to stimulate vibrations of the second resonant frequency in the elevations (3) by periodic exertion of pressure on the elevations (3), whereby the elevations (3) periodically lift-off from the contact surface (2b) and the rotor (4) is set into rotation.
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Budd Mark
Koninklijke Philips Electronics , N.V.
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