Actuator

Details Actuator Actuator

2006-12-05

2006-12-05

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S328000, C310S348000

Reexamination Certificate

active

07145282

ABSTRACT:
An actuator includes a piezoelectric stack within a housing that applies a compressive load to the stack. The housing may include a cylindrical tube closed at one end and may seal the stack against fluid pressure. The housing may be shorter than the length of the piezoelectric stack and may include resilient means for inducing elastic strain in the stack. The resilient means may include one or more slots extending around the circumference of the housing and/or a corrugated region of the housing to form a tension spring at a lower end of the housing. The tension spring may then serve to draw the stack into compression. The stack may include a plurality of layers of piezoelectric or piezoceramic material interspersed with a plurality of layers of electrically conductive material and connecting means for connecting the layers to a source of electrical power.

REFERENCES:
patent: 4471256 (1984-09-01), Igashira et al.
patent: 4803393 (1989-02-01), Takahashi
patent: 5205147 (1993-04-01), Wada et al.
patent: 5359252 (1994-10-01), Swift et al.
patent: 5986386 (1999-11-01), Jaenker
patent: 6274967 (2001-08-01), Zumstrull et al.
patent: 6291929 (2001-09-01), Heinz et al.
patent: 6326717 (2001-12-01), Mattes
patent: 6333586 (2001-12-01), Polach et al.
patent: 6499471 (2002-12-01), Shen et al.
patent: 6685113 (2004-02-01), Ruehle et al.
patent: 6698072 (2004-03-01), Stier et al.
patent: 6700308 (2004-03-01), Heinz
patent: 6739423 (2004-05-01), Tashiro et al.
patent: 6984924 (2006-01-01), Voigt et al.
patent: 2002/0084723 (2002-07-01), Kawazoe
patent: 2004/0046060 (2004-03-01), Maurer
patent: 2004/0069963 (2004-04-01), Mattes et al.
patent: 2004/0174096 (2004-09-01), Lux et al.
patent: 3922504 (1990-06-01), None
patent: 10139550 (2003-03-01), None
patent: 0977285 (2000-02-01), None
patent: 58-218183 (1983-12-01), None

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