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Shut-off valves for pipelines

  • US 5,379,983 A
  • Filed: 12/21/1993
  • Issued: 01/10/1995
  • Est. Priority Date: 12/21/1993
  • Status: Expired due to Term
First Claim
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1. A shut-off slide valve for use in pipelines or for closing a container aperture, said shut-off slide valve comprising a housing, a shut-off member displaceable in said housing;

  • and an actuation member for displacing said shut-off member in said housing,wherein said shut-off member comprises a sealing plate and a counter element spaced from said sealing plate;

    wherein said actuation member has a portion extending between said sealing plate and said counter element;

    wherein at least one of said sealing plate and said counter element has a collar substantially bridging the space between said sealing plate and said counter element, so that said shut-off member has a shape similar to that of a lid-covered can;

    wherein said shut-off slide valve further comprises spring means for connecting said sealing plate and said counter element with each other and for pulling said sealing plate and said counter element toward each other, and spread-apart means arranged between said sealing plate and said counter element for spreading said sealing plate and said counter element away from each other; and

    wherein said spring means comprises a leaf spring, said leaf spring having a major portion thereof extending substantially in a displacement direction of said actuation member, and has an end portion protruding beyond an end of said shut-off member remote from said actuation member, said end portion having an end jutting out relative to said end of said shut-off member.

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