A coupling for joining metal pipes or pipe sections end-to-end to form a pipe assembly. A plastic cuff is formed on one of the pipe ends and a mating, second plastic cuff is formed on the other pipe end. In one embodiment, a wire hoop is mounted over each pipe end, the hoops are rotatable around th
A coupling for joining metal pipes or pipe sections end-to-end to form a pipe assembly. A plastic cuff is formed on one of the pipe ends and a mating, second plastic cuff is formed on the other pipe end. In one embodiment, a wire hoop is mounted over each pipe end, the hoops are rotatable around the associated pipe ends to align the hoops, and bolt assemblies spanning the two hoops are used to tighten the hoops axially, to thereby clamp the pipe ends and compress the cuffs between the pipe ends and provide a leak-proof joint. The cuffs are selected from configurations including tongue-and-groove and bell-and-spigot. The cuffs can be formed on the pipe ends in the shop, then the pre-cuffed pipe sections can be readily assembled into stable, leak-proof, corrosion-resistant lengths of pipe in the field.
대표청구항▼
What is claimed is: 1. A pipe assembly, comprising: first and second corrugated metal pipes having respective first and second longitudinal axes and respective first and second ends; a first plastic cuff molded formed along the periphery of the first pipe end and embedding the first pipe end therei
What is claimed is: 1. A pipe assembly, comprising: first and second corrugated metal pipes having respective first and second longitudinal axes and respective first and second ends; a first plastic cuff molded formed along the periphery of the first pipe end and embedding the first pipe end therein and a mating second plastic cuff formed along the periphery of the second pipe end and embedding the second pipe end therein; each of the first and second cuffs comprising a shoulder formed around the periphery of the associated first and second pipes; the first plastic cuff comprising a tongue, the second plastic cuff comprising a groove, and the first and second cuffs forming a mating tongue and groove joint peripherally spanning the first and second pipe ends; and fastening means spanning the first and second shoulders and abutting the first and second shoulders, the fastening means drawing the first and second pipe ends together axially and thereby sealing the first and second pipe ends along the tongue and groove joint. 2. The pipe assembly of claim 1, the fastening means comprising: first and second hoops mounted around the first and second pipe ends, respectively, and abutting the first and second shoulders, respectively; each hoop comprising a plurality of holes or loops spaced apart around the hoop at intervals selected for aligning the holes of the first and second hoops by rotating the hoops about the longitudinal axes of the first and second pipes; and a plurality of bolts extending between the hoops and through the aligned holes thereof for clamping the hoops against the shoulders thereby drawing the first and second pipe ends together axially and sealing the first and second pipe ends along the tongue and groove joint. 3. The pipe assembly of claim 2, the first hoop further comprising therein a first gap; a first end of the first hoop being on one side of the first gap; a second end of the first hoop being on the opposite side of the first gap; and first means joining the first and second ends of the first hoop at the first gap; and the second hoop further comprising therein a second gap; a first end of the second hoop being on one side of the second gap; a second end of the second hoop being on the opposite side of the second gap; and second means joining the first and second ends of the second hoop at the second gap. 4. The pipe assembly of claim 3, the first means comprising a first weld; and the second means comprising a second weld. 5. The pipe assembly of claim 3: the first means of the first hoop comprising a first loop mounted on one side of the first gap and a second loop mounted on the opposite side of the first gap; the first and second loops of the first hoop being oriented generally transverse to the plane of the first hoop; and a first bolt extending through the first and second loops for drawing together the first and second loops at the first gap and thereby tightening the first hoop against the associated pipe; and the second means of the second hoop comprising a third loop mounted on one side of the second gap and a fourth loop mounted on the opposite side of the second gap; the third and fourth loops of the second hoop being oriented generally transverse to the plane of the second hoop; and a second bolt extending through the third and fourth loops for drawing together the third and fourth loops at the second gap and thereby tightening the second hoop against the associated pipe. 6. A pipe assembly, comprising: first and second metal pipes having longitudinal axes and respective first and second ends; a first plastic cuff formed along the periphery of the first pipe end and a second plastic cuff formed along the periphery of the second pipe end, the first and second cuffs having a tongue and a groove, respectively, with the first, tongue cuff inserted into the second, groove cuff; first and second wire hoops mounted over the first and second pipe ends; and a plurality of bolt fasteners for tightening the first and second hoops and the first and second pipe ends axially, to seat the first and second pipe ends against the first and second cuffs, seat the first and second cuffs against one another, and seal the pipe ends against the cuffs. 7. A pipe assembly, comprising: first and second metal pipes having respective first and second ends; first and second plastic cuffs embedding the first and second pipe ends, respectively, each cuff forming a shoulder, the first and second cuffs having a tongue and groove, respectively, adapted for mating when the first cuff is inserted into the second cuff; first and second wire hoops mounted around the first and second pipe ends, respectively; and a plurality of fasteners extending between the hoops and clamping the hoops against the shoulders and the first and second pipe ends against the first and second cuffs. 8. Components for a composite metal and plastic pipe assembly, comprising: first and second metal pipes having longitudinal axes and respective first and second ends; a first plastic cuff embedding the first pipe end and a second plastic cuff embedding the second pipe end, the first and second cuffs having a tongue and a groove, respectively, adapted for mating when the first cuff is inserted into the second cuff; first and second wire hoops of size and configuration adapted for mounting over and engaging the first and second pipe ends, respectively; and a plurality of fasteners adapted for clamping the first and second hoops and the first and second pipe ends axially. 9. A method for fastening and sealing first and second pipes at respective first and second ends thereof, the method comprising: shoulder, the first and second cuffs having a tongue and groove, respectively, adapted for mating when the first cuff is inserted into the second cuff, each cuff having a shoulder, assembling a first hoop around the first pipe end adjacent the shoulder of the first cuff and a second hoop around the second pipe end adjacent the shoulder of the second cuff; and clamping the first and second hoops together generally axially along the first and second pipes, thereby clamping the hoops against the shoulders and the first and second pipe ends against the first and second cuffs.
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이 특허에 인용된 특허 (9)
Kanao Shiro (No. 9-18 ; Nanpeidai 4-chome Takatsuki-shi ; Osaka JPX), Corrugated pipe with joint and method of forming the latter on the former.
Kanao, Shigeki, Connection structure of wave-shaped synthetic resin pipes, wave-shaped synthetic resin pipes used for the connection structure, and manufacturing method thereof.
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