Pipe coupling having keys with camming surfaces
First Claim
1. A coupling for connecting two pipes together end to end, said pipes having circumferential grooves proximate to each end, said coupling comprising a plurality of segments positionable end to end circumferentially around said pipes, each of said segments having a pair of keys projecting radially inwardly toward said pipes, each key for engagement with said circumferential groove of one of said pipes, said keys being positioned in spaced apart relation from one another and defining a space therebetween, at least one of said keys on one of said segments having a first camming surface positioned adjacent to one end of said segment, said first camming surface being engageable with one of said grooves to force one of said pipes in an axial direction a predetermined distance away from the other of said pipes when said segments are forcibly engaged circumferentially around said pipes.
2 Assignments
0 Petitions
Accused Products
Abstract
A coupling for connecting two pipes together end to end is disclosed. The coupling includes a plurality of segments positionable circumferentially around the pipes. Each of the segments is attachable to one another end to end. Each of the segments has a pair of keys projecting radially inwardly toward the pipes. Each key is engageable with a circumferential groove on one of the pipes. Camming surfaces are positioned on the keys adjacent to the ends of the segments. Each camming surface preferably has an angularly oriented face that forms a wedge to provide a mechanical advantage when the camming surface engages the groove.
-
Citations
36 Claims
- 1. A coupling for connecting two pipes together end to end, said pipes having circumferential grooves proximate to each end, said coupling comprising a plurality of segments positionable end to end circumferentially around said pipes, each of said segments having a pair of keys projecting radially inwardly toward said pipes, each key for engagement with said circumferential groove of one of said pipes, said keys being positioned in spaced apart relation from one another and defining a space therebetween, at least one of said keys on one of said segments having a first camming surface positioned adjacent to one end of said segment, said first camming surface being engageable with one of said grooves to force one of said pipes in an axial direction a predetermined distance away from the other of said pipes when said segments are forcibly engaged circumferentially around said pipes.
-
19. A coupling for connecting two pipes together end to end, said pipes each having a circumferential groove proximate to their ends, said coupling comprising:
-
first and second arcuate segments positionable end to end circumferentially around said pipes;
a lug positioned at each end of each said segment, said lugs on said first segment being positionable in facing relation with said lugs on said second segment;
a pair of fasteners, each said fastener extending between two of said lugs for attaching said lugs in facing relation to one another;
a pair of keys extending lengthwise along each segment and projecting radially inwardly, said keys on each segment being in spaced relation to one another, each said key being engageable with a groove on one of said pipes for retaining said pipes to said segments; and
a pair of camming surfaces positioned on each of said keys adjacent to each of said lugs, said camming surfaces being angularly orientated with respect to an axis oriented substantially tangential to said keys thereby forming a wedge at each end of said keys, said wedges being engageable with said grooves for forcing said pipes into spaced relation to one another when said segments are forcibly engaged circumferentially around said pipes. - View Dependent Claims (20, 21, 22, 23, 24, 26, 27, 28)
-
-
25. A coupling portion attachable to like coupling portions for forming a coupling joining pipes together end to end, said pipes each having a circumferential groove proximate to their ends, said coupling portion comprising:
-
an arcuate segment positionable circumferentially engaging said pipes;
a lug positioned at each end of said segment and projecting outwardly therefrom, said lug facilitating attachment of said coupling portions to one another;
a pair of keys extending lengthwise along said segment and projecting radially inwardly, said keys on said segment being in spaced relation to one another, each said key being engageable with a groove on one of said pipes for retaining said pipes to said segment; and
a pair of camming surfaces positioned on each of said keys adjacent to each of said lugs, said camming surfaces being engageable with said grooves to force said pipes in an axial direction a predetermined distance away from one another when said segments are forcibly engaged circumferentially around said pipes. - View Dependent Claims (29, 30, 31)
-
- 32. A coupling for connecting two pipes together end to end, at least one of said pipes having a circumferential groove proximate to an end thereof, said coupling comprising a plurality of segments positionable end to end circumferentially around said one pipe, one of said segments having a key projecting radially inwardly for engagement with said circumferential groove of said one pipe, said key having a camming surface positioned adjacent to one end of said segment, said camming surface being engageable with said groove when said segments are forcibly engaged circumferentially around said one pipe.
Specification