US3679237A — Coupling for joining glass pipe sections and the …

Claim 1

Independent Claim 417 words

A coupling for joining the juxtaposed ends of two glass pipe sections or the like, said coupling comprising: a pair of glass pipe sections, each having at its free end an enlarged coupling bell, said end bells being spaced and juxtaposed; an integral axially extending coupling chamber formed in each of the end bells; each of the two coupling chambers having an open end facing an open end of the other and spaced therefrom, and an inner axial surface with a diameter larger, at least in part, than the inner diameter of the pipe sections; an annular deformable coupling sleeve of plastic material having formretaining characteristics, with end portions disposed in said coupling chambers to interconnect the latter, said coupling sleeve having at least in part an outer peripheral diameter greater than the diameter of said inner axial surfaces of sAid coupling chambers to form radial fluid seals therewith, and having a peripheral ring-receiving groove intermediate the spaced free ends of said bells; and an elastomer O-ring snugly operatively mounted in said ring-receiving groove in abutting relation with said spaced free bell ends tO form axial seals therewith; and clamping means operatively mounted on the exterior of said end bells to draw the latter toward each other to effect axial pressure between the end bells and said O-ring to effect and maintain said aforementioned seals, said clamping means comprising a first annular coupling ring and a second annular coupling ring threadedly telescoped into said first coupling ring, said first and said second coupling rings together defining an axial central bore therethrough having a diameter in part larger than the outer diameter of said end bells so as to fit thereover and including axially opposite end portions inclined to a diameter smaller than the diameter of said inner axial surfaces of said chambers but greater than the outer diameter of said pipe sections, said end bells together defining oppositely facing inclined outer rear shoulders, and said inclined end portions of the coupling rings firmly abutting respectively said inclined rear shoulders of the bells, rings being structured of deformable plastic material and each including an axial split completely through the side-wall structure thereof to facilitate the radial mounting of said coupling rings on said pipe sections, the split in one of said coupling rings extending axially along the axes of symmetry of said coupling rings, and the split in the other of said coupling rings extending at an inclination relative to the axes of symmetry of said coupling rings.

Claim 2

Dependent Claim 417 words

A coupling for joining the juxtaposed ends of two glass pipe sections or the like, said coupling comprising: a pair of glass pipe sections, each having at its free end an enlarged coupling bell, said end bells being spaced and juxtaposed; an integral axially extending coupling chamber formed in each of the end bells; each of the two coupling chambers having an open end facing an open end of the other and spaced therefrom, and an inner axial surface with a diameter larger, at least in part, than the inner diameter of the pipe sections; an annular deformable coupling sleeve of plastic material having formretaining characteristics, with end portions disposed in said coupling chambers to interconnect the latter, said coupling sleeve having at least in part an outer peripheral diameter greater than the diameter of said inner axial surfaces of sAid coupling chambers to form radial fluid seals therewith, and having a peripheral ring-receiving groove intermediate the spaced free ends of said bells; and an elastomer O-ring snugly operatively mounted in said ring-receiving groove in abutting relation with said spaced free bell ends tO form axial seals therewith; and clamping means operatively mounted on the exterior of said end bells to draw the latter toward each other to effect axial pressure between the end bells and said O-ring to effect and maintain said aforementioned seals, said clamping means comprising a first annular coupling ring and a second annular coupling ring threadedly telescoped into said first coupling ring, said first and said second coupling rings together defining an axial central bore therethrough having a diameter in part larger than the outer diameter of said end bells so as to fit thereover and including axially opposite end portions inclined to a diameter smaller than the diameter of said inner axial surfaces of said chambers but greater than the outer diameter of said pipe sections, said end bells together defining oppositely facing inclined outer rear shoulders, and said inclined end portions of the coupling rings firmly abutting respectively said inclined rear shoulders of the bells, rings being structured of deformable plastic material and each including an axial split completely through the side-wall structure thereof to facilitate the radial mounting of said coupling rings on said pipe sections, the split in one of said coupling rings extending axially along the axes of symmetry of said coupling rings, and the split in the other of said coupling rings extending at an inclination relative to the axes of symmetry of said coupling rings.

Claim 3

Dependent Claim 36 words

A coupling as described in claim 1, wherein the splits in said coupling rings are each inclined with reference to the axis of symmetry of the other of said coupling rings, and inclined in opposite directions.

Claim 4

Dependent Claim 305 words

A coupling for joining the opposing end portions of two non-metallic pipe sections which end portions are respectively provided with radial flanges comprising: means defining an enlarged axial chamber in each pipe section opening through said end thereof and having an axial inner surface, a deformable coupling sleeve of plastic material having form-retaining characteristics, with end portions disposed in said chambers to interconnect the latter, said coupling sleeve having at least in part an outer diameter greater than the diameter of said axial surfaces of the chambers to form radial fluid seals therewith, a resilient O-ring surrounding the sleeve in abutting relation to said ends of the pipe sections, to form a seal therewith, and clamping means mounted on said flanges of the pipe sections and interconnecting the latter to draw them toward each other to effect axial pressure between said ends of the pipe sections and said O-ring to effect and maintain said aforementioned seals, said clamping means comprising a first annular coupling ring and a second annular coupling ring threadedly telescoped into said first coupling ring, said first and second coupling rings being made of a deformable plastic material, together defining an axially central bore therethrough having a diameter in part larger than the outer diameter of said pipe flanges so as to fit thereover, and including axially opposite end portions extending radially inwardly beyond the outer diameter of said pipe flanges to provide shoulders engageable with the axially rear surfaces of said flanges to exert pressure thereon in an axial direction, said coupling rings each including an axial split completely through the side-wall structure thereof to facilitate the radial mounting of said coupling rings on said pipe sections, said splits in the coupling rings being in a relationship to cross one another at an angle and thereby prevent alignment of the splits.

Claim 5

Dependent Claim 305 words

A coupling for joining the opposing end portions of two non-metallic pipe sections which end portions are respectively provided with radial flanges comprising: means defining an enlarged axial chamber in each pipe section opening through said end thereof and having an axial inner surface, a deformable coupling sleeve of plastic material having form-retaining characteristics, with end portions disposed in said chambers to interconnect the latter, said coupling sleeve having at least in part an outer diameter greater than the diameter of said axial surfaces of the chambers to form radial fluid seals therewith, a resilient O-ring surrounding the sleeve in abutting relation to said ends of the pipe sections, to form a seal therewith, and clamping means mounted on said flanges of the pipe sections and interconnecting the latter to draw them toward each other to effect axial pressure between said ends of the pipe sections and said O-ring to effect and maintain said aforementioned seals, said clamping means comprising a first annular coupling ring and a second annular coupling ring threadedly telescoped into said first coupling ring, said first and second coupling rings being made of a deformable plastic material, together defining an axially central bore therethrough having a diameter in part larger than the outer diameter of said pipe flanges so as to fit thereover, and including axially opposite end portions extending radially inwardly beyond the outer diameter of said pipe flanges to provide shoulders engageable with the axially rear surfaces of said flanges to exert pressure thereon in an axial direction, said coupling rings each including an axial split completely through the side-wall structure thereof to facilitate the radial mounting of said coupling rings on said pipe sections, said splits in the coupling rings being in a relationship to cross one another at an angle and thereby prevent alignment of the splits.

Claim 6

Dependent Claim 250 words

A coupling for joining the opposing end portions of two non-metallic pipe sections which end portions are respectively provided witH radial flanges comprising: sealing means including a member of annular cross section inserted in said opposing end portions of pipe sections and extending therebetween, said sealing means further including a resilient element supported by and encircling said member in abutting relation to said ends of the pipe sections to form a seal therewith, and clamping means mounted on said flanges of the pipe sections and interconnecting the latter to draw them toward each other to effect axial pressure between said ends of the pipe sections and said element of said sealing means, said clamping means comprising a first annular coupling ring and a second annular coupling ring threadedly telescoped into said first coupling ring, said first and second coupling rings defining an axially central bore therethrough having a diameter in part larger than the outer diameter of said pipe flanges so as to fit thereover, and including axially opposite end portions extending radially inwardly beyond the outer diameter of said pipe flanges to provide shoulders engageable with the axially rear surfaces of said flanges to exert pressure thereon in an axial direction, said coupling rings each including an axial split completely through the side-wall structure thereof to facilitate the radial mounting of said coupling rings on said pipe sections, said splits in the coupling rings being angularly inclined with reference to one another to thereby prevent alignment of said splits.

Claim 7

Dependent Claim 250 words

A coupling for joining the opposing end portions of two non-metallic pipe sections which end portions are respectively provided witH radial flanges comprising: sealing means including a member of annular cross section inserted in said opposing end portions of pipe sections and extending therebetween, said sealing means further including a resilient element supported by and encircling said member in abutting relation to said ends of the pipe sections to form a seal therewith, and clamping means mounted on said flanges of the pipe sections and interconnecting the latter to draw them toward each other to effect axial pressure between said ends of the pipe sections and said element of said sealing means, said clamping means comprising a first annular coupling ring and a second annular coupling ring threadedly telescoped into said first coupling ring, said first and second coupling rings defining an axially central bore therethrough having a diameter in part larger than the outer diameter of said pipe flanges so as to fit thereover, and including axially opposite end portions extending radially inwardly beyond the outer diameter of said pipe flanges to provide shoulders engageable with the axially rear surfaces of said flanges to exert pressure thereon in an axial direction, said coupling rings each including an axial split completely through the side-wall structure thereof to facilitate the radial mounting of said coupling rings on said pipe sections, said splits in the coupling rings being angularly inclined with reference to one another to thereby prevent alignment of said splits.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-07-25	1976-01-24	1976-07-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-07-25	1980-01-24	1980-07-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-07-25	1984-01-24	1984-07-25	$7700.00	Window Closed / Lapsed

Coupling for joining glass pipe sections and the like

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag