Method for producing piezo actuators with a multiple-layer...

Details Method for producing piezo actuators with a multiple-layer... Method for producing piezo actuators with a multiple-layer...

2005-08-23

2005-08-23

Vo, Peter (Department: 3729)

Metal working

Piezoelectric device making

C029S03300H, C029S435000, C029S456000, C029S458000, C310S369000, C492S043000, C492S044000

Reexamination Certificate

active

06931697

ABSTRACT:
A method for producing a piezoelectric actuator (8) with a multilayer structure of layers of a piezoelectric sheet (3, 4), and with inner electrodes disposed between them, is proposed, in which the individual layers are formed of two continuous strands (3, 4) of the piezoelectric sheet, and the two strands (3, 4) are wound over one another in the form of a double helix to form a hollow-cylindrical stack, thereby enclosing the inner electrode between them. The two strands (3, 5) are preferably guided over deflection rollers (5, 6, 7) in such a way that the overlays of the two strands (3, 4) on the already-wound stack are offset from one another by a predetermined angular amount.

REFERENCES:
patent: 4821390 (1989-04-01), Seyler
patent: 4870742 (1989-10-01), Roloff
patent: 5241235 (1993-08-01), Culp
patent: 5559387 (1996-09-01), Beurrier
patent: 99 13681 (1999-03-01), None
Patent Abstracts of Japan vol. 017, No. 356 (E-1394), Jul. 6, 1993 & JP 05 055659 A, Mar. 5, 1993.
Patent Abstracts ofjapan vol. 017, No. 466 (E-1421), Aug. 25, 1993 & JP 05 110156 A, Apr. 30, 1993.
Patent Abstracts of Japan vol. 017, No. 115 (E-1330) Mar. 10, 1993 & JP 04 295 286 A, Oct. 20, 1992.

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