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Valve slide

  • US 4,921,213 A
  • Filed: 09/08/1989
  • Issued: 05/01/1990
  • Est. Priority Date: 09/14/1988
  • Status: Expired due to Fees
First Claim
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1. In a valve slide including a slide housing and defining a slide passage opening, a closing member slidable in the plane of the slide into a closed position for closing the slide passage opening, a sealing surface being provided surrounding the slide passage opening, wherein, in the closed position of the closing member, a circumferentially closed sealing member whose shape corresponds to the sealing surface rests against the sealing surface, imaginary straight generatrices of the sealing surface extending at a right angle to the plane in which the axis of the slide and the sliding direction of the closing member are located, wherein the improvement comprises that, in the direction of the generatrices of the sealing surface, the sealing surface has an upper portion, a middle portion and a lower portion, each portion defining a plane, the upper portion and the lower portion each including an obtuse angle with the middle portion, the planes of the upper portion and of the lower portion of the sealing surface extending approximately perpendicularly to the sliding direction of the closing member, the circumferentially closed sealing member having components which interact with the sealing surface, wherein at least the components of the sealing member which interact with the middle portion of the sealing surface extend along straight lines and parallel to that plane which includes the axis of the slide and the direction of sliding of the closing member.

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