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Quarter-turn valve

  • US 4,890,817 A
  • Filed: 02/08/1988
  • Issued: 01/02/1990
  • Est. Priority Date: 05/15/1987
  • Status: Expired due to Fees
First Claim
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1. A quarter-turn valve comprising:

  • a housing formed with a cylindrical socket, an inlet nipple at one side of the socket, and an outlet nipple at the diametrically opposite side of the socket;

    and a cylindrical plug receivable within said socket and having a bore extending diametrically through the plug for establishing communiation between the inlet and outlet nipples in the open position of the plug, but terminating said communication when the plug is turned to its closed position one-quarter turn from said open position, said plug being formed with a finger-piece projecting from the housing for manually rotating the plug to its open, closed or an intermediate position;

    said plug being closed at its bottom, such that the fluid flowing through said bore subjects the plug to a fluid pressure which is balanced on all sides of the plug, thereby facilitating turning of the plug and preventing its accidental ejection when subjected to a high pressure;

    said cylindrical plug being formed with a circular recess for receiving an annular sealing ring on each of the two diametrically opposite sides of the plug midway between the ends of said bore, said sealing rings being aligned with the passageways through the inlet and outlet nipples in the closed position of the plug;

    said housing being formed with cross-bars extending across the nipple openings to prevent unseating of said sealing rings during the rotation of the plug from its closed to its open positions.

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