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Low friction ball valve

  • US 5,193,780 A
  • Filed: 06/30/1992
  • Issued: 03/16/1993
  • Est. Priority Date: 10/03/1991
  • Status: Expired due to Fees
First Claim
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1. A low friction ball valve comprising:

  • a valve body defining an interior passage for fluid flow and having a seal disposed at least at one end of the passage;

    at least two rollers each mounted on a pin fixed in the interior passage of the valve body;

    a valve ball defining an interior passage and rotating within the valve body passage, closing the valve body passage in a first position by bearing against the seal, with the rollers each fitting within a detent in the valve ball in the first position, and the valve ball in a second position aligning its interior passage with that of the valve body, wherein in the second position the rollers each contact an outer surface of the valve ball, thereby reducing friction between the valve ball and the seal.

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