Patent ID: 7322376

Claim:
A piezoelectric valve comprising a flexural transducer arranged in a valve housing and having at one end a supporting section mounted by bearing means in the housing and furthermore possessing a free ending operational section, which extends in a valve chamber past two controlled valve openings in the form of a supply opening and an exit flow opening and is able to be deflected by suitable electrical control in a defection plane athwart its longitudinal direction in order to clear each of the two controlled valve openings selectively for connection with an operational opening or by engagement with an associated valve seat to close same, wherein the two controlled valve openings are arranged on the same longitudinal side of the operational section spaced apart in the longitudinal direction thereof, the operational section having two suitably spaced apart control sections on the supply side and the exit flow side, which are adapted to respectively seal the valve seats of the two controlled valve openings, and at the supply side control section actuating means provided in addition to the flexural transducer engage the operational section, such actuating means serving to continuously actuate the supply side control section in its closing direction, the actuating force being large enough to hold the supply side control section in the closed position when the exit flow control section is in the cleared position, and wherein the flexural transducer is so designed and arranged that in the electrically voltage-free neutral condition both control sections assume the closed position in relation to the controlled valve opening respectively associated with them, the flexural transducer being able to be so electrically controlled that its operational section starting with the neutral state experiences a deflecting force in the one or the other direction.