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Sealed valve and control means therefor

  • US 5,099,867 A
  • Filed: 01/07/1991
  • Issued: 03/31/1992
  • Est. Priority Date: 10/04/1990
  • Status: Expired due to Fees
First Claim
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1. A sealed valve, comprising:

  • a valve body having a flow path connecting an inlet and an outlet, the entire valve body being sealed from the entire atmosphere;

    a movable valve member in the valve body adapted to be moved between open and closed positions;

    a disc in the valve body spaced from the valve member and mounted for rotation;

    polyphase electrical supply means external of the valve body for inducing a current in the disc, thereby creating torque in the disc and causing the disc to rotate;

    means connecting the disc to the valve member whereby rotation of the disc causes movement of the valve member;

    means for detecting the rotative position of the disc; and

    means for deenergizing the electrical supply means when the disc reaches a predetermined rotative position.

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