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Valve

  • US 5,120,019 A
  • Filed: 05/16/1991
  • Issued: 06/09/1992
  • Est. Priority Date: 08/03/1989
  • Status: Expired due to Term
First Claim
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1. A gate valve, comprising in combination a face plate adapted to form a boundary of a vacuum region and having an aperture to be sealed, a mountings plate supported substantially perpendicular to said face plate and having at least one access aperture closed by a flexible seal, a hinge block pivotally mounted on said mounting plate outside said vacuum region about a hinge axis in the vicinity of said access aperture, said hinge block including a bearing adapted to receive a rod therethrough so as to provide a fulcrum for pivot motion of said rod while permitting sliding motion of said rod within said bearing, a rod having a yoke mounted at one extremity thereof and laterally confined within said bearing and passing sealingly through said flexible seal, a gate member supported on said rod at the opposite extremity thereof in cooperative relationship with said aperture, means for imparting longitudinal movement to said yoke so as to move said gate member between a position covering said aperture and a position not covering said aperture, and means for imparting lateral movement to said yoke after said gate member is in said position covering said aperture so as to pivot said rod together with said hinge block about said hinge axis so as to move said gate member between a position sealing said aperture and a position not sealing said aperture.

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