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Valve actuating mechanism

  • US 3,318,568 A
  • Filed: 08/13/1964
  • Issued: 05/09/1967
  • Est. Priority Date: 08/13/1964
  • Status: Expired due to Term
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First Claim
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1. IN ACTUATING MECHANISM FOR MOVING A FIRST VALVE SEAT MOUNTED ADJACENT ONE END OF A GATE VALVE DISC TOWARD AND AWAY FROM A SECOND VALVE SEAT CARRIED BY A VALVE BODY:

  • (A) A PIVOT MEMBER ADJACENT THE OPPOSITE END OF SAID DISC FROM SAID FIRST VALVE SEAT, (B) MEANS LIMITING LATERAL MOVEMENT OF SAID PIVOT MEMBER RELATIVE TO THE VALVE BODY AND PERMITTING FREE, STRAIGHT LINE SLIDING OF SAID PIVOT MEMBER TOWARD AND AWAY FROM SAID SECOND VALVE SEAT SO THAT SAID FIRST VALVE SEAT IS ADAPTED TO MOVE IN A STRAIGHT LINE TOWARD AND AWAY FROM SEATED POSITION AND THEN IN AN ARCUATE DIRECTION TO OPEN AND CLOSED POSITIONS, (C) THERE BEING AN OPENING THROUGH SAID DISC INTERMEDIATE SAID PIVOT MEMBER AND SAID FIRST VALVE SEAT DEFINING A CLOSED YOKE-TYPE CAM FOLLOWER, (D) A ROTATABLE STEM EXTENDING THROUGH SAID OPENING, (E) A CAM CARRIED BY SAID STEM ENGAGING SAID CAM FOLLOWER AND DEFINING THEREWITH A POSITIVE MOTION CAM WHICH PERMITS MOTION OF SAID DISC ONLY WITH MOTION OF SAID CAM, (F) SAID CAM AND CLOSED YOKE-TYPE CAM FOLLOWER BEING OF A SHAPE AND ARRANGED TO MOVE SAID FIRST VALVE SEAT IN A SUBSTANTIALLY STRAIGHT LINE INTO AND OUT OF CONTACT WITH SAID SECOND VALVE SEAT AND LIMIT MOVEMENT OF SAID FIRST VALVE SEAT TO SUBSTANTIALLY STRAIGHT LINE MOVEMENT AS IT MOVES INTO AND OUT OF CONTACT WITH SAID SECOND VALVE SEAT, AND (G) SAID CAM AND CLOSED YOKE-TYPE CAM FOLLOWER ALSO BEING OF A SHAPE AND ARRANGED TO MOVE SAID FIRST VALVE SEAT IN AN ARCUATE PATH SELECTIVELY FROM CLOSED TO OPEN POSITIONS AFTER SAID FIRST VALVE SEAT IS MOVED TO UNSEATED POSITION RELATIVE TO SAID SECOND VALVE SEAT.

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