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BALL VALVE

  • US 3,598,363 A
  • Filed: 09/04/1969
  • Issued: 08/10/1971
  • Est. Priority Date: 09/04/1969
  • Status: Expired due to Term
First Claim
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1. A ball valve Comprising a housing having a passage therethrough with openings in opposite sides and including a chamber therebetween, a ball valve member mounted for rotation in said chamber and movable appreciably in opposite directions, opposing ring bearing means internally mounted on the housing inwardly of and adjacent to said openings for limited axial movement and engaging said ball valve member, resilient means urging said bearing means towards each other to retain bearing contact with the ball and locate the ball in working position, said ball valve when closed being movable under pressure of fluid in the housing predominantly towards one of said bearing means against its resilient means, means for sealing said one of the bearing means against said housing under said ball movement and pressure, and pressure responsive ring seal means disposed between one of said bearing means and the ball in a space axially greater than its axial thickness and urged by pressure to move in either axial direction to marginally engage said ball in sealing relationship.

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