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Valve assembly and disassembly device

  • US 4,390,039 A
  • Filed: 09/20/1982
  • Issued: 06/28/1983
  • Est. Priority Date: 01/04/1982
  • Status: Expired due to Fees
First Claim
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1. A valve having a retractable valve seat, including a valve body having an inlet port, an outlet port and an upper opening in a first surface intermediate said inlet and output ports, a cover for closing the upper opening, a valve member for controlling the flow of fluid between the inlet port and outlet port, said valve seat being in contact with the valve member and a central chamber between said inlet port and said outlet port for receiving said valve member, said valve further comprising:

  • means for retracting said valve seat, said means for retraction being formed of an elongated main section, a forward section and a rear section, said forward section including a camming surface for contacting said valve seat and having a variable diameter as well as a constant diameter portion, said rear section being formed for receiving a force for moving the means for retraction; and

    said first surface having holes formed therein for receiving said means for retraction, said holes being formed in a portion of said first surface which is not sealingly covered by said cover, whereby said means for retraction may be inserted in said holes without removing said cover;

    wherein said movement of the means for retraction causes the point of said contact of said camming surface to change to a point having said constant diameter, forcing said seat to retract and remain retracted in a locked position by said constant diameter.

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  • 3 Assignments
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