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US 12,044,264 B2Granted
Method and apparatus for fastening in a high fluid pressure environment
AssigneeNord-Lock Switzerland GmbH
InventorsAndrew Duncan McPhee, Adam Glenn Lutty
Life of this patent
Estimating the term…
Abstract
The present invention relates to a multi jackbolt tensioner and methods of using the same. The present invention alleviates some of the problems associated with presently available multi jackbolt tensioners.
Claims16
A multi jackbolt tensioner comprising:
- a body portion formed to engage an elongate fastening member or integrally formed therewith, the body portion having a plurality of holes spaced uniformly from a longitudinal central axis at spaced apart locations about an outer periphery thereof, the holes having sidewalls formed with body threads;
- jackbolts each including a body having threads to threadedly engage the body threads in one of the holes in the body portion;
- and
- a load bearing member for applying force to a workpiece to be fastened and arranged for locating about the elongate fastening member, wherein the load bearing member comprising a first annular face connected to a second annular face by an inner wall and an outer wall, and a cylindrical lip projecting from the first annular face, wherein the cylindrical lip comprises a wall that is continuous with the inner wall, wherein the cylindrical lip is adapted to form a seal with a workpiece being fastened,
- wherein the load bearing member further comprises a concentric protrusion projecting from the second annular face.
2 more elements
A method of compressing a first workpiece and a second workpiece together including the steps of:
- locating a load bearing member on the first workpiece, the load bearing member comprising a first annular face connected to a second annular face by an inner wall and an outer wall, and a cylindrical lip projecting from the first annular face, wherein the cylindrical lip comprises a wall that is continuous with the inner wall, wherein the cylindrical lip is adapted to form a seal with the first workpiece or the second workpiece, wherein the load bearing member further comprises a concentric protrusion projecting from the second annular face;
- locating a body portion on the load bearing member, wherein the body portion engages an elongate fastening member or is integrally formed therewith, the body portion having a plurality of holes spaced uniformly from a longitudinal central axis at spaced apart locations about an outer periphery thereof, the holes having sidewalls formed with body threads,
- capturing the elongate fastening member on an outer side of the second workpiece;
- coupling jackbolts including a body having threads to threadedly engage the body threads in each of the holes in the body portion;
- tensioning the jackbolts,
- to thereby compress the first and second workpieces towards each other.
3 more elements
Dependencies are inferred from the claim text.