Pipe coupling

Claim 2

A pipe coupling comprising: a first pipe; a second pipe having an inward deformation in one end thereof, said second pipe being telescopingly received in said first pipe; and force applying means connecting said first and second pipes together at said deformation, said force applying means maintaining said first pipe in tensile stress in the circumferential direction thereby stretching said first pipe in close fitting and sealing engagement around said second pipe.

Claim 3

The pipe coupling set forth in claim 1 wherein said means for securing said first and second pipes together includes a screw passing through said first pipe and threadedly received in said deformation in said second pipe.

Claim 4

The pipe coupling set forth in claim 2 and further including an inwardly directed annular flange formed in said deformation in said second pipe and threadedly receiving said screw.

Claim 5

The pipe coupling set forth in claim 2 and further including an elongated tab formed from the end of said second pipe and reversely bent to extend axially inwardly in parallel adjacent relation to said deformation in said second pipe and threadedly receiving said screw.

Claim 6

The pipe coupling set forth in claim 1 including a deformation in said first pipe and wherein said means for securing said first and second pipes together incLudes a bolt passing through said deformation in said first pipe, and an internally threaded member adjacent said deformation in said second pipe and threadedly receiving said bolt.

Claim 7

The pipe coupling set forth in claim 5 wherein said internally threaded member is a nut secured to the inner surface of said deformation in said second pipe.

Claim 8

The pipe coupling set forth in claim 1 wherein said inward deformation in said second pipe is arcuately formed about a center exterior of said second pipe.

Claim 9

The pipe coupling set forth in claim 1 wherein said second pipe is of a diameter not substantially less than the diameter of said first pipe.

Claim 10

The pipe coupling set forth in claim 1 wherein said second pipe has a wall thickness not substantially less than the wall thickness of said first pipe.

Claim 11

A pipe coupling comprising: a first pipe having a deformation therein and generally normal to the axis thereof; a second pipe having an outer diameter at least substantially as great as the inner diameter of said first pipe and having a concave deformation therein and generally normal to the axis thereof and of greater depth than said concave deformation in said first pipe, said second pipe being telescopingly received in said first pipe with said deformations in aligned relation; and force applying means connecting said deformations together to draw the deformation in the first pipe toward engagement with the deformation in the second pipe and maintain the first pipe in tensile stress thereby stretching said first pipe into conformity with said second pipe to provide peripheral surface-to-surface sealing engagement therebetween.

Claim 12

A pipe coupling comprising: a first pipe having a deformation therein and generally normal to the axis thereof; a second pipe having an outer diameter at least substantially as great as the inner diameter of said first pipe and having a concave deformation therein and generally normal to the axis thereof and of greater depth than said concave deformation in said first pipe, said second pipe being telescopingly received in said first pipe with said deformations in aligned relation; and force applying means connecting said deformations together to draw the deformation in the first pipe toward engagement with the deformation in the second pipe and maintain the first pipe in tensile stress thereby stretching said first pipe into conformity with said second pipe to provide peripheral surface-to-surface sealing engagement therebetween.

Claim 13

A pipe coupling comprising: a first pipe having a radially inwardly directed deformity formed therein; a second pipe telescopingly received in said first pipe and having a radially inwardly directed deformity formed therein and being in radially inwardly spaced and aligned relation with said deformity in said first pipe when said second pipe is inserted therein; an aperture in said deformity in said first pipe; an aperture in said deformity in said second pipe and in aligned relation with said aperture in said first pipe when said second pipe is inserted therein; an apertured washer member having an outer surface of substantially the same configuration as said deformity in said second pipe and received in said deformity in said first pipe; and a threaded securing member received in said aperture in said washer and said aperture in said first pipe and threadedly engaging said deformity in said second pipe about said aperture therein, said securing member being tightened to force said deformity in said first pipe into engagement with said deformity in said second pipe and circumferentially stretching said first pipe into sealing engagement with said second pipe.

Claim 14

A pipe coupling comprising: a first pipe having a radially inwardly directed deformity formed therein; a second pipe telescopingly received in said first pipe and having a radially inwardly directed deformity formed therein and being in radially inwardly spaced and aligned relation with said deformity in said first pipe when said second pipe is inserted therein; an aperture in said deformity in said first pipe; an aperture in said deformity in said second pipe and in aligned relation with said aperture in said first pipe when said second pipe is inserted therein; an apertured washer member having an outer surface of substantially the same configuration as said deformity in said second pipe and received in said deformity in said first pipe; and a threaded securing member received in said aperture in said washer and said aperture in said first pipe and threadedly engaging said deformity in said second pipe about said aperture therein, said securing member being tightened to force said deformity in said first pipe into engagement with said deformity in said second pipe and circumferentially stretching said first pipe into sealing engagement with said second pipe.

Claim 15

The pipe coupling set forth in claim 11 wherein said second pipe has an outer diameter no less than the inner diameter of said first pipe.

Claim 16

The pipe coupling set forth in claim 12 wherein said second pipe has a wall thickness no less than the wall thickness of said first pipe.

Claim 17

The pipe coupling set forth in claim 11 wherein said second pipe has a wall thickness no less than the wall thickness of said first pipe.

Claim 18

A pipe coupling comprising first and second pipes, one of said pipes having a preformed end portion and one having an end portion with a wall defining an axially extending passage, the second pipe having a deformation therein with a cross-sectional configuration which in at least one position will fit inside the cross-sectional wall configuration of the first pipe and having a peripheral length on the outer surface which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, and force applying means extending between said pipes at said deformation to draw said pipes together at said deformation for deforming the wall configuration of one of said pipes to change the cross-sectional dimensionS thereof to produce a close fitting engagement with the other pipe, said force applying means maintaining the wall of said one of said pipes in the deformed configuration with stresses therein substantially exceeding the residual stresses which obtain when the force applying means is released.

Claim 19

A pipe coupling comprising first and second pipes, one of said pipes having a preformed end portion and one having an end portion with a wall defining an axially extending passage, the second pipe having a deformation therein with a cross-sectional configuration which in at least one position will fit inside the cross-sectional wall configuration of the first pipe and having a peripheral length on the outer surface which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, and force applying means extending between said pipes at said deformation to draw said pipes together at said deformation for deforming the wall configuration of one of said pipes to change the cross-sectional dimensionS thereof to produce a close fitting engagement with the other pipe, said force applying means maintaining the wall of said one of said pipes in the deformed configuration with stresses therein substantially exceeding the residual stresses which obtain when the force applying means is released.

Claim 20

A pipe coupling comprising first and second pipes, one of said pipes having a preformed end portion and one having an end portion with a wall defining an axially extending passage, the second pipe having a cross-sectional configuration which in at least one position will fit inside the wall configuration of the first pipe and having peripheral length on the outer surface which is greater than the peripheral length of the opposed inner surface of the wall of the first pipe, and force applying means adapted to act between said pipes for deforming the wall configuration of one of said pipes to change the cross-sectional dimensions thereof and produce a close fitting engagement with the other of said pipes wherein the second pipe is in compressive stress and the first pipe is in tensile stress.

Claim 21

A pipe coupling comprising first and second pipes, one of said pipes having a preformed end portion and one having an end portion with a wall defining an axially extending passage, the second pipe having a cross-sectional configuration which in at least one position will fit inside the wall configuration of the first pipe and having peripheral length on the outer surface which is greater than the peripheral length of the opposed inner surface of the wall of the first pipe, and force applying means adapted to act between said pipes for deforming the wall configuration of one of said pipes to change the cross-sectional dimensions thereof and produce a close fitting engagement with the other of said pipes wherein the second pipe is in compressive stress and the first pipe is in tensile stress.

Claim 22

The pipe coupling as set forth in claim 15 wherein said second pipe is preformed with a substantially circular wall configuration with an inward deformation therein and said first pipe is preformed with a substantially circular wall configuration and wherein said force applying means is effective to change the cross-sectional dimension of the second pipe by deforming the wall configuration thereof to a substantially circular configuration.

Claim 23

The pipe coupling as set forth in claim 16 wherein said first and second pipes are both preformed with a substantially circular wall configuration with an inward deformation therein, the deformation in said second pipe being deeper than the deformation in said first pipe and wherein said force applying means is effective to deform the wall configuration of said first pipe so that it conforms to the wall configuration of said second pipe, the second pipe remaining substantially unchanged from the preformed configuration thereof.

Claim 24

The pipe coupling defined in claim 15 wherein the second pipe has a preformed end portion with a wall including an axially elongated inward deformation, said inward deformation having greater depth at one end thereof than at the other whereby the peripheral length on the outer surface of the second pipe is greater at one end of said deformation than at the other end and thereby providing a variable length of wall available for deformation into engagement with the first pipe.

Claim 25

The pipe coupling defined in claim 15 wherein the second pipe has a preformed end portion with a wall including an inward deformation, one of said pipes having reduced wall thickness along an axially extending line in the axial vicinity of the inward deformation whereby said deforming is facilitated.

Claim 26

A pipe coupling member comprising a pipe having a preformed end portion with a wall defining an axially extending passage, said pipe having a wall configuration including an axially elongated inward deformation extending from the end of said pipe to a radial shoulder, said pipe being adapted to be inserted by axially directed sliding motion into another pipe, said pipe having a peripheral length on its outer surface through said deformation which is not substantially less than the peripheral length on the inner surface of the other pipe, said inward deformation defining an opening at the innermost portion thereof and being adapted to receive a screw threaded fastener whereby said inward deformation may be deformed outwardly by force exerted by said fastener between said pipes when the other pipe is inserted into said pipe.

Claim 27

A pipe coupling member comprising a pipe having a preformed end portion with a wall defining an axially extending passage, said pipe having a wall configuration including an axially elongated inward deformation extending from the end of said pipe to a radial shoulder, said pipe being adapted to be inserted by axially directed sliding motion into another pipe, said pipe having a peripheral length on its outer surface through said deformation which is not substantially less than the peripheral length on the inner surface of the other pipe, said inward deformation defining an opening at the innermost portion thereof and being adapted to receive a screw threaded fastener whereby said inward deformation may be deformed outwardly by force exerted by said fastener between said pipes when the other pipe is inserted into said pipe.

Claim 28

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the second pipe having a preformed wall configuration with an inward deformation adjacent the end thereof and which, in at least one position, will fit inside the wall configuration of tHe first pipe, said second pipe having a peripheral length on the outer surface of said wall which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, said wall of said second pipe at the inner portion of said inward deformation defining an axially extending slot, a spacer plate adjacent said wall and extending between the edges thereof, and force applying means adapted to act between said plate and said first pipe for deforming the wall configuration of said second pipe to change the cross-sectional dimension thereof and producing tensile stress in the first pipe and compressive stress in the second pipe.

Claim 29

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the second pipe having a preformed wall configuration with an inward deformation adjacent the end thereof and which, in at least one position, will fit inside the wall configuration of tHe first pipe, said second pipe having a peripheral length on the outer surface of said wall which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, said wall of said second pipe at the inner portion of said inward deformation defining an axially extending slot, a spacer plate adjacent said wall and extending between the edges thereof, and force applying means adapted to act between said plate and said first pipe for deforming the wall configuration of said second pipe to change the cross-sectional dimension thereof and producing tensile stress in the first pipe and compressive stress in the second pipe.

Claim 30

The pipe coupling as set forth in claim 22 wherein the wall of said second pipe has a reduced thickness along a line extending axially from the inner end of said slot whereby the deformation of the wall configuration of said second pipe is facilitated by said force applying means and wherein said spacer plate has an axial length extending at least coextensively with said reduced wall thickness to thereby cover any opening that may occur upon deforming the wall configuration.

Claim 31

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the first pipe having a preformed wall configuration which, in at least one position, will fit inside the wall configuration of the second pipe, one of said pipes having a deformation including an opening in its wall configuration, the other of said pipes having an opening adapted to be aligned with the opening in said one of said pipes, the peripheral length of the outer surface of the inner pipe being not substantially less than the inner surface of the outer pipe, fastener means extending through the opening in one of said pipes and interlocked therewith and adapted to engage the other of said pipes when the two members are fitted together with said openings in alignment, said fastener means being adapted to apply a force acting between said pipes for deforming the wall configuration of one of said pipes to change the cross-sectional dimensions thereof and produce a close fitting mechanical engagement with the other pipe, said fastener retaining the walls of said pipes in said deformed configuration.

Claim 32

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the first pipe having a preformed wall configuration which, in at least one position, will fit inside the wall configuration of the second pipe, one of said pipes having a deformation including an opening in its wall configuration, the other of said pipes having an opening adapted to be aligned with the opening in said one of said pipes, the peripheral length of the outer surface of the inner pipe being not substantially less than the inner surface of the outer pipe, fastener means extending through the opening in one of said pipes and interlocked therewith and adapted to engage the other of said pipes when the two members are fitted together with said openings in alignment, said fastener means being adapted to apply a force acting between said pipes for deforming the wall configuration of one of said pipes to change the cross-sectional dimensions thereof and produce a close fitting mechanical engagement with the other pipe, said fastener retaining the walls of said pipes in said deformed configuration.

Claim 33

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the second pipe having a preformed wall configuration which includes an inward deformation and having its end portion disposed inside the end portion of the first pipe, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, an opening in one of said pipes, a headed fastener having a shank extending through said opening and an adjustable stop on said shank to retain said fastener in a captive relation with said one of said pipes, the wall of the other of said pipes defining a slot extending from the end thereof to the deformation therein whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener member, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 34

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the second pipe having a preformed wall configuration which includes an inward deformation and having its end portion disposed inside the end portion of the first pipe, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, an opening in one of said pipes, a headed fastener having a shank extending through said opening and an adjustable stop on said shank to retain said fastener in a captive relation with said one of said pipes, the wall of the other of said pipes defining a slot extending from the end thereof to the deformation therein whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener member, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 35

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the first pipe having a preformed wall configuration which includes an inward deformation, the second pipe having a preformed wall configuration which includes an inward deformation of greater depth than the deformation in the first pipe, the second pipe having its end portion disposed inside the end portion of the first Pipe with said deformations aligned, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is greater than the peripheral length of the opposed inner surface of the wall of the first pipe, the deformation in one of said pipes defining an opening, a headed fastener having a shank extending through said opening and an adjustable stop on said shank to retain said fastener in a captive relation with said one of said pipes, the wall of the other of said pipes defining a slot extending from the end thereof to the deformation therein whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes wherein the second pipe is in compressive stress and the first pipe is in tensile stress.

Claim 36

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the first pipe having a preformed wall configuration which includes an inward deformation, the second pipe having a preformed wall configuration which includes an inward deformation of greater depth than the deformation in the first pipe, the second pipe having its end portion disposed inside the end portion of the first Pipe with said deformations aligned, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is greater than the peripheral length of the opposed inner surface of the wall of the first pipe, the deformation in one of said pipes defining an opening, a headed fastener having a shank extending through said opening and an adjustable stop on said shank to retain said fastener in a captive relation with said one of said pipes, the wall of the other of said pipes defining a slot extending from the end thereof to the deformation therein whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes wherein the second pipe is in compressive stress and the first pipe is in tensile stress.

Claim 37

The pipe coupling defined in claim 26 wherein said second pipe defines said opening with the shank of said fastener extending therethrough, a support band disposed around said second pipe with an opening therein and said fastener extending therethrough, said adjustable stop holding said fastener and band in captive relationship, and wherein said band retains said first pipe from separation at said slot when the fastener applies force between said pipes.

Claim 38

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the second pipe having a preformed wall configuration which includes an inward deformation and having its end portion disposed inside the end portion of the first pipe, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, said first pipe defining an opening, a headed fastener having a shank extending through said opening and an adjustable stop on said shank to retain said fastener in a captive relation with said first pipe, the wall of the second pipe defining a slot extending from the end thereof whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 39

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the second pipe having a preformed wall configuration which includes an inward deformation and having its end portion disposed inside the end portion of the first pipe, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is not substantially less than the peripheral length of the opposed inner surface of the wall of the first pipe, said first pipe defining an opening, a headed fastener having a shank extending through said opening and an adjustable stop on said shank to retain said fastener in a captive relation with said first pipe, the wall of the second pipe defining a slot extending from the end thereof whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 40

The pipe coupling defined in claim 28 wherein said fastener has a threaded shank with a keyway therein, said first pipe defining an opening with a key adapted to engage said keyway, a washer defining a key in the opening thereof adapted to engage said keyway whereby said fastener, first pipe and washer are held against relative rotation by the keys and keyway.

Claim 41

A pipe coupling member comprising a pipe having an end portion with a wall defining an axially extending passage, said pipe having a preformed wall configuration which includes an inward deformation defining an opening at the innermost portion thereof, said pipe being adapted to be inserted by axial sliding motion into the wall configuration of another pipe, said pipe having a peripheral length on the outer surface thereof which is not substantially less than the peripheral length of the opposed inner surface of the wall of the other pipe, a support band disposed around said pipe and defining an opening therein, a headed fastener having a shank extending through the opening in said pipe and through the opening in said support band, an adjustable stop on said shank to retain said fastener and band in captive relationship with said pipe whereby said pipe and band are adapted to receive said other pipe therebetween and said fastener may be tightened to deform said other pipe in the vicinity of said deformation by applying a force between said pipes and produce a close fitting mechanical engagement therebetween.

Claim 42

A pipe coupling member comprising a pipe having an end portion with a wall defining an axially extending passage, said pipe having a preformed wall configuration which includes an inward deformation defining an opening at the innermost portion thereof, said pipe being adapted to be inserted by axial sliding motion into the wall configuration of another pipe, said pipe having a peripheral length on the outer surface thereof which is not substantially less than the peripheral length of the opposed inner surface of the wall of the other pipe, a support band disposed around said pipe and defining an opening therein, a headed fastener having a shank extending through the opening in said pipe and through the opening in said support band, an adjustable stop on said shank to retain said fastener and band in captive relationship with said pipe whereby said pipe and band are adapted to receive said other pipe therebetween and said fastener may be tightened to deform said other pipe in the vicinity of said deformation by applying a force between said pipes and produce a close fitting mechanical engagement therebetween.

Claim 43

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the first pipe having a preformed wall configuration which includes an inward deformation, the second pipe having a preformed wall configuration which includes an inward deformation of greater depth than the deformation in the first pipe, the second pipe having its end portion disposed inside the end portion of the first pipe with said deformations aligned, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is greater than the peripheral length of the opposed inner surface of the wall of the first pipe, the deformation in the first pipe defining an opening, a threaded fastener having a head and a shank extending outwardly through said opening and a washer on said fastener having an inner surface corresponding to the shape of the inward deformation in the first pipe, a nut on said shank to retain said fastener and washer in a captive relation with said first pipe, the wall of the second pipe defining a slot extending from the end thereof to the deformation therein whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes wherein the second pipe is in compressive stress and the first pipe is in tensile stress.

Claim 44

A pipe coupling comprising first and second pipes each having an end portion with a wall defining an axially extending passage, the first pipe having a preformed wall configuration which includes an inward deformation, the second pipe having a preformed wall configuration which includes an inward deformation of greater depth than the deformation in the first pipe, the second pipe having its end portion disposed inside the end portion of the first pipe with said deformations aligned, the second pipe having a wall configuration with a peripheral length on the outer surface thereof which is greater than the peripheral length of the opposed inner surface of the wall of the first pipe, the deformation in the first pipe defining an opening, a threaded fastener having a head and a shank extending outwardly through said opening and a washer on said fastener having an inner surface corresponding to the shape of the inward deformation in the first pipe, a nut on said shank to retain said fastener and washer in a captive relation with said first pipe, the wall of the second pipe defining a slot extending from the end thereof to the deformation therein whereby said pipes may be assembled with the second pipe inside the first pipe by sliding the pipes axially with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes wherein the second pipe is in compressive stress and the first pipe is in tensile stress.

Claim 45

The pipe coupling defined in claim 31 wherein said fastener has a shank with a keyway therein, said first pipe defining a key in said opening adapted to engage said keyway, said washer defining a key in the opening thereof adapted to engage said keyway whereby said fastener, first pipe and washer are held against relative rotation by the keys and keyway.

Claim 46

A pipe coupling member comprising a pipe having an end portion with a wall defining an axially extending passage and having a preformed wall configuration which includes an inward deformation, said pipe being adapted to have its end portion disposed over the end portion of another pipe having a wall configuration with an inward deformation and a slot extending axially from its end with a peripheral length on the outer surface thereof which is greater than the peripheral length of the opposed inner surface of the wall of said pipe, the deformation in said pipe defining an opening, a fastener having a head and a threaded shank, the shank extending through said opening and a washer on said fastener having an inner surface corresponding to the shape of the inward deformation in said pipe, a nut on said shank to retain said fastener and washer in a captive relation with said pipe, the head of said fastener including a spacer land adjacent said shank, whereby said pipe is adapted to receive the other pipe by axial insertion thereof with said slot in alignment with said spacer land of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 47

A pipe coupling member comprising a pipe having an end portion with a wall defining an axially extending passage and having a preformed wall configuration which includes an inward deformation, said pipe being adapted to have its end portion disposed over the end portion of another pipe having a wall configuration with an inward deformation and a slot extending axially from its end with a peripheral length on the outer surface thereof which is greater than the peripheral length of the opposed inner surface of the wall of said pipe, the deformation in said pipe defining an opening, a fastener having a head and a threaded shank, the shank extending through said opening and a washer on said fastener having an inner surface corresponding to the shape of the inward deformation in said pipe, a nut on said shank to retain said fastener and washer in a captive relation with said pipe, the head of said fastener including a spacer land adjacent said shank, whereby said pipe is adapted to receive the other pipe by axial insertion thereof with said slot in alignment with said spacer land of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 48

For use in a pipe coupling of the type comprising first and second pipes one of which has an end portion adapted to fit inside the end portion of the other, the inner one having a preformed inward deformation defining an axially extending slot and the outer having a preformed inward deformation defining an opening, the inner pipe having peripheral length on its outer surface Which is not substantially less than the peripheral length on the inner surface of the outer pipe, a threaded fastener having a head and a threaded shank, said head having an inner surface of concave cross section corresponding to the configuration of the inward deformation in the inner pipe, said head also including a spacer land adjacent said shank having a width corresponding to said slot and adapted to be received therein with said shank extending through said opening, said fastener being adapted to receive a washer and a nut whereby force may be applied between said pipes for deforming the walls thereof into close fitting engagement.

Claim 49

For use in a pipe coupling of the type comprising first and second pipes one of which has an end portion adapted to fit inside the end portion of the other, the inner one having a preformed inward deformation defining an axially extending slot and the outer having a preformed inward deformation defining an opening, the inner pipe having peripheral length on its outer surface Which is not substantially less than the peripheral length on the inner surface of the outer pipe, a threaded fastener having a head and a threaded shank, said head having an inner surface of concave cross section corresponding to the configuration of the inward deformation in the inner pipe, said head also including a spacer land adjacent said shank having a width corresponding to said slot and adapted to be received therein with said shank extending through said opening, said fastener being adapted to receive a washer and a nut whereby force may be applied between said pipes for deforming the walls thereof into close fitting engagement.

Claim 50

A pipe coupling member comprising a pipe having an end portion with a wall defining an axially extending passage and having a preformed wall configuration which includes an axially elongated inward deformation extending from the end of said pipe to a radial should therein, said pipe being adapted to have its end portion disposed over the end portion of another pipe having a wall configuration with an inward deformation and a slot extending axially from its end with a peripheral length on the outer surface thereof which is greater than the peripheral length on the opposed inner surface of the wall of said pipe, the deformation in said pipe defining a noncircular opening, a fastener having a head and a threaded shank, the shank extending through said opening and having a cross section conforming thereto, a washer on said shank and having a non circular opening whereby the fastener, washer and pipe are held against relative rotation, said washer having an inner surface corresponding to the shape of the inward deformation in said pipe, a nut on said shank to retain said fastener and washer in a captive relation with said pipe, whereby said pipe is adapted to receive the other pipe by axial insertion thereof with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.

Claim 51

A pipe coupling member comprising a pipe having an end portion with a wall defining an axially extending passage and having a preformed wall configuration which includes an axially elongated inward deformation extending from the end of said pipe to a radial should therein, said pipe being adapted to have its end portion disposed over the end portion of another pipe having a wall configuration with an inward deformation and a slot extending axially from its end with a peripheral length on the outer surface thereof which is greater than the peripheral length on the opposed inner surface of the wall of said pipe, the deformation in said pipe defining a noncircular opening, a fastener having a head and a threaded shank, the shank extending through said opening and having a cross section conforming thereto, a washer on said shank and having a non circular opening whereby the fastener, washer and pipe are held against relative rotation, said washer having an inner surface corresponding to the shape of the inward deformation in said pipe, a nut on said shank to retain said fastener and washer in a captive relation with said pipe, whereby said pipe is adapted to receive the other pipe by axial insertion thereof with said slot in alignment with said shank of the fastener, said fastener being adapted to apply a force between said pipes for deforming the wall configuration of at least one of said pipes to change the cross-sectional dimension thereof and produce a close fitting mechanical engagement with the other of said pipes.