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Combination ball and check valve

  • US 5,551,479 A
  • Filed: 10/05/1994
  • Issued: 09/03/1996
  • Est. Priority Date: 10/05/1994
  • Status: Expired due to Fees
First Claim
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1. A combination ball and check valve for control of fluids through a conduit, comprising:

  • a valve housing having a longitudinal opening extending therethrough;

    a ball valve closure member disposed within the housing adjacent a first end thereof, the ball valve closure member having a bore extending therethrough, and the ball valve closure member adapted to be rotated to a closed position wherein the ball valve closure member is in sealing engagement with an annular seat disposed within the housing to prevent the flow of fluid through the longitudinal opening, and adapted to be rotated to an open position wherein the bore within the ball valve closure member is brought into fluid communication with the longitudinal opening to permit the flow of fluid therepast;

    a one-way closure member disposed within the housing adjacent a second end thereof, the one-way closure member adapted to be rotated to a closed position wherein the one-way closure member is in sealing engagement with a seat disposed within the housing to prevent the flow of fluid through the longitudinal opening in a first direction, and adapted to be rotated to an open position wherein the one-way closure member permits the flow of fluid therepast in a second direction;

    a removable second bonnet sealably covering a second access opening in the housing adjacent the one-way closure member, the second opening sized to permit the insertion and removal of the one-way closure member; and

    the second bonnet and the second access opening are generally rectangular in configuration with a major axis thereof extending transversely to the longitudinal axis of the longitudinal opening.

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