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US 2003/0155842 A1Published application
Piezo actuator
OwnerMaximilian Hans Hobelsbergerinventor
Life of this patent
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Abstract
The actuator consists typically of two thin strips of material. One strip is made of e.g. steel. One surface of this strip is structured with tooth-like projections. To the tips of these teeth a second strip is attached. The second strip consists of e.g. piezoelectric material and is equipped with electrodes. Upon application of voltage the second strip changes its length and bends via the attached teeth the whole structure. The teeth-like structures provide stronger bending torque. The structure can also be used as a micromachined motor.
Claims17
Mechanical actuator, comprising
- at least two members which are mechanically connected to each other by a multitude of tooth-shaped projections,
- wherein said projections are in substantially firm mechanical connection with at least one of said members such that a torsional torque exercised on said projections will be transferred to said member to which said projections is firmly connected so that said torque is also exercised on said member to which said projections is firmly connected,
- wherein at least one of said members alters its dimensions when being affected by external influences such that the distance between adjacent projections connected to said member is altered,
- whereby said alteration in distance between projections causes bending torque being exercised on said projections and said members connected to the projections.
1 more element
Dependencies are inferred from the claim text.