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Closure apparatus for pipes and vessels

  • US 5,048,876 A
  • Filed: 11/02/1989
  • Issued: 09/17/1991
  • Est. Priority Date: 11/02/1989
  • Status: Expired due to Term
First Claim
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1. Apparatus for joining together first and second elements, comprising first and second elements each including a circumferential flange having a roller-bearing surface, a ring member adapted to be placed about said circumferential flanges, two sets of rollers disposed on the interior surface of said ring member, one set of said rollers adapted to engage the bearing surface of the flange of one of said elements and the second set of rollers adapted to engage the bearing surface of the flange of said second element, at least one of said flanges having openings therein through which said rollers may pass, and means attached to said ring member and to one of said elements to rotate said ring member and to cause said rollers to move circumferentially on said bearing surfaces, whereby said ring member may be selectively moved between a locked position wherein said flanges are joined and an unlocked position wherein one of said sets of rollers is aligned with said openings in said flange to permit said flanges to be separated.

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