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A closure and locking device for a pipe coupling includes lugs on the juxtaposed ends of coupling segments that interfit and can be locked in a closed position by a locking pin. The lugs each provide reaction members which are employed in the pressure loading and closing of the coupling against the

A closure and locking device for a pipe coupling includes lugs on the juxtaposed ends of coupling segments that interfit and can be locked in a closed position by a locking pin. The lugs each provide reaction members which are employed in the pressure loading and closing of the coupling against the bias of a resilient sealing gasket contained within the segments of the coupling, with the closing accomplished with the aid of a tool which is removably engagable with the lugs of the coupling.

대표청구항 ▼

1. In a pipe coupling of the type including plural arcuate coupling segments, engagement means on the inner periphery of each said segment for securing the juxtaposed ends of pipe members, a gasket receiving channel in each coupling segment, and means securing said coupling segments to each other in

1. In a pipe coupling of the type including plural arcuate coupling segments, engagement means on the inner periphery of each said segment for securing the juxtaposed ends of pipe members, a gasket receiving channel in each coupling segment, and means securing said coupling segments to each other in end-to-end relationship, at least one of said securing means providing a hinge and another of said securing means providing a closure and locking means for said coupling, the improvement comprising: said plural arcuate segments being of identical shape and configuration with each other; said closure and locking means including; parallelly arranged lugs extending radially outwardly of each end of each said coupling segment, said lugs being arranged and positioned for inter-fitting inter-engagement of the lugs at the juxtaposed ends of the coupling segments in the closed condition of said coupling; a nose portion of at least one of said lugs extending beyond the plane of the associated end of its associated coupling segment and providing said inter-fitting inter-engagement of said lugs; an undercut end portion of each said lug extending outwardly of the outer periphery of the associated coupling segment and facing oppositely from the adjacent end of the associated coupling segment, said undercut end portions being of identical contour when viewed axially of the associated coupling segment, said oppositely facing undercut end portions each providing for the temporary reception and location of a separate and independent toggle linkage used in closure of the coupling and providing reaction members for said toggle linkage during closure of said coupling; and locking means extending transversely of said lugs through aligned apertures in the interfitted pairs of lugs and locking said coupling in its closed condition; each of said lugs, in the assembled condition of the coupling, presenting an external contour when viewed axially of the coupling that is symmetrical on each opposite side of said inter-fitted lugs. 2. The pipe coupling of claim 1, in which said apertures are provided by re-entrant surfaces of said end portion. 3. The coupling of claim 1, in which said apertures are provided by bores through said lugs. 4. The coupling of claim 1, in combination with a tool for closing said coupling and which is operative to force the respective lugs into inter-engagement with each other. 5. The combination of claim 4, in which said tool comprises a toggle linkage separate from and detachably attachable to said inter-fitted lug means, said toggle linkage being engagable with said tail portions and being operable to draw the respective lug means into inter-fitted relationship against the reaction force produced by compression of a resilient gasket contained within said coupling members and to permit insertion of said locking pin into said apertures, said toggle linkage being attachable to said coupling in either a right-handed or left-handed orientation, and being detachable from said coupling subsequent to insertion of said locking pin. 6. The pipe coupling of claim 5, in which the lug means at one end of each coupling segment are spaced axially of the coupling segment by a distance greater than the spacing of the lug means at the opposite end thereof. 7. The pipe coupling of claim 5, in which the lug means at one end of each coupling segment are plural in number, the lug means at the respective ends of each coupling segment being axially offset relatively to each other, each lug means at one end of each coupling segment being axially spaced from the adjacent lug means by a distance at least equal to the axial thickness of the inter-fitting lugs at the opposite end of each said coupling segment. 8. The pipe coupling of claim 1, in which said locking pin has a central portion of greater diameter than the respective ends thereof, the apertures in the outermost lugs are of a diameter at least equal to the diameter of said central portion of said locking pin, and the apertures in the innermost lugs are offset relatively to the apertures in the outermost lugs and are of a diameter at least equal to the combined diameter of said central portion of said locking pin and the distance of offsetting of the respective apertures. 9. In combination, a pipe coupling of the type including plural arcuate coupling segments, keys on the inner periphery of each said coupling segment for engagement with juxtaposed ends of a pair of pipes, a gasket receiving channel in each coupling segment, a resilient gasket positioned within said channel, and closure and locking means for securing said coupling segments to each other in end-to-end relationship encircling said pipe ends: said plural arcuate segments being of identical shape and configuration with each other; said closure and locking means including; parallelly arranged lugs extending radially outwardly of each end of each said coupling segment, said lugs being arranged and positioned for inter-fitting inter-engagement of the lugs at the juxtaposed ends of the coupling segments in the closed condition of said coupling; a nose portion on at least one of said lugs extending beyond the plane of the associated end of its associated coupling segment and providing said inter-fitting inter-engagement of said lugs; an undercut end portion of each said lug extending outwardly of the outer periphery of the associated coupling segment and facing oppositely from the adjacent end of the associated coupling segment, said undercut end portions being of identical contour when viewed axially of the associated coupling segment, said oppositely facing undercut end portions each providing for the temporary reception and location of a separate and independent toggle linkage used in closure of the coupling and providing reaction members for said toggle linkage during closure of said coupling; locking means extending transversely of said lugs through aligned apertures in the inter-fitted pairs of lugs and locking said coupling in its closed condition; each of said lugs, in the assembled condition of the coupling, presenting an external contour when viewed axially of the coupling that is symmetrical on each opposite side of said inter-fitted lugs; and, a toggle linkage separate from, and detachably attachable to said inter-fitted lug means, said toggle linkage being engageable with said oppositely facing camming surfaces and operable to draw the respective lug means into inter-fitted relationship against the reaction force produced by compression of said resilient gasket to permit insertion of said locking means into said apertures, said toggle linkage being detachable from said coupling subsequent to insertion of said locking pin. 10. The combination of claim 9, in which said toggle linkage includes a toggle lever having a camming nose for engagement with the camming surfaces of the lugs of one of said coupling segments, and a reaction member hingedly connected to said toggle lever at position spaced from said nose, said reaction member having a portion for engagement with the camming surfaces of the inter-fitting lugs of the other of said coupling segments.