Skew pipe coupling
First Claim
1. In a pipe coupling which includes a pair of metallic arcuate housings of substantially identical configuration and a bolt and a nut for securing said arcuate housings, each of said arcuate housings having boly pads at the opposite ends and key sections formed along transverse edges of the arcuate housing, each of said key sections engageable with an annular groove formed on an outer circumferential surface of a pipe end, the improvement comprising:
- an aperture formed at each bolt pad in a position offset from said transverse central axis of the arcuate housing for receiving said bolt inserted therein;
a protrusion and a groove each integrally formed on an abutting surface of said arcuate housing in a position offset from said transverse central axis and symmetrical relative to said vertical central axis;
a cylindrical surface formed on said protrusion; and
a mating cylindrical surface formed on said groove;
said groove receiving said protrusion upon tightening of said bolt and nut for rotating said arcuate housings in adverse directions around a vertical central axis for skewed attachment of said arcuate housing on a pair of pipe ends.
1 Assignment
0 Petitions
Accused Products
Abstract
A pipe coupling is provided having a pair of arcuate housings each provided with a crescent groove and a crescent protrusion formed on an abutting end surface of the arcuate housings in the positions which is symmetrical to each other around a vertical axis and is offset from a transverse central axis. When the arcuate housings are tightened by bolts and nuts, the crescent protrusion is inserted into the crescent groove, thereby causing skewed movement of the arcuate housings around the vertical central axis of the pipe coupling in adverse directions to the predetermined angular positions. Thus, upon completion of tightening by the bolts, excessive tightening by the bolt is prevented due to mutual contact of the abutting end surfaces of the arcuate housings.
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Citations
7 Claims
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1. In a pipe coupling which includes a pair of metallic arcuate housings of substantially identical configuration and a bolt and a nut for securing said arcuate housings, each of said arcuate housings having boly pads at the opposite ends and key sections formed along transverse edges of the arcuate housing, each of said key sections engageable with an annular groove formed on an outer circumferential surface of a pipe end, the improvement comprising:
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an aperture formed at each bolt pad in a position offset from said transverse central axis of the arcuate housing for receiving said bolt inserted therein; a protrusion and a groove each integrally formed on an abutting surface of said arcuate housing in a position offset from said transverse central axis and symmetrical relative to said vertical central axis; a cylindrical surface formed on said protrusion; and a mating cylindrical surface formed on said groove; said groove receiving said protrusion upon tightening of said bolt and nut for rotating said arcuate housings in adverse directions around a vertical central axis for skewed attachment of said arcuate housing on a pair of pipe ends. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification