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VALVE ARRANGEMENT FOR SUCTION TUBES

  • US 3,705,601 A
  • Filed: 04/06/1971
  • Issued: 12/12/1972
  • Est. Priority Date: 04/06/1970
  • Status: Expired due to Term
First Claim
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1. A valve arrangement for suction tubes, characterized in that it comprises at least two pistons which are mutually mechanically connected and so designed that the one piston always is subject to pressure variations in the one end of the suction tube and the other piston always is subject to pressure variations in the other end of the suction tube, and in that an underpressure in one tube part involves that the effective piston surface which is exposed to the underpressure, causes opening of the valve.

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