Piezoelectric valve

Fluid handling – Systems – Multi-way valve unit

Reexamination Certificate

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Details

C137S625500, C251S129060

Reexamination Certificate

active

07322376

ABSTRACT:
A piezoelectric valve has a flexural transducer accommodated in a valve housing and having a free ending cantilever operational section able to be deflected by electrical control. The operational section extends over two controlled valve openings lying on the same side and possesses two control section associated with such valve openings. One of the control section serves for control of a supply opening and is urged into its closed by actuating means provided in addition to the flexural transducer. The actuating force is powerful enough to reach the closed position, when the other control section clears the associated valve opening.

REFERENCES:
patent: 4450375 (1984-05-01), Siegal
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patent: 5219278 (1993-06-01), van Lintel
patent: 5343894 (1994-09-01), Frisch et al.
patent: 5669416 (1997-09-01), Nusche
patent: 6142444 (2000-11-01), Kluge
patent: 6484754 (2002-11-01), Muth et al.
patent: 6499509 (2002-12-01), Berger et al.
patent: 2002/0059957 (2002-05-01), Frisch et al.
patent: 2004/0177890 (2004-09-01), Weinmann et al.
patent: 0 538 236 (1993-04-01), None
patent: 0 993 567 (2000-04-01), None
patent: 1 207 329 (2002-05-01), None

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