Patent US3692336A successfully refreshed from Google Patents.
US3692336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe construction
Assignee: Wavin BV
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Filing: 1970-10-27
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Granted: 1972-09-19
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Expires: 1990-10-27
Abstract
Abstract A tensile stress resistant pipe connection comprising two male pipes and a sleeve with two conically tapering recesses, sealing means at the ends of the sleeve and coupling means situated in said recess, the free end of one male pipe in the recesses being provided with left hand screw thread, a free end of the other one with right hand screw thread of about the same pitch.
Inventors
- 👤 Cornelis Van Zon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:50
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/092; F16L37/0925; F16L37/0926
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
234 words
A pipe connection comprising a female pipe part and a male pipe part, sealing means situated and between and sealingly engaging the female and male parts, annular coupling means of at least the same hardness as the pipe parts for connecting in a tensile stress resistant way the male and female parts, said female part being provided on the inner side thereof with a single annular recess conically tapering inwardly in the direction of the free end of the female pipe part and of a shape and dimensions such that the end of the male pipe part can be slid past the coupling means accommodated in said recess, the surface of the coupling means cooperating in such a way with the outer surface of the wall of the male pipe part, when the male part and the female part move away from each other, that the coupling means are moved thereby with the male part and become wedged between the outer side of the male pipe part and the wall of the recess while forming a tensile stress resistant connection, the free end of a male pipe part being provided with a screw thread which cooperates with a similar screw thread on the cooperating surface of the coupling means, and a sleeve provided in the inner side of male part opposite the coupling means in order to prevent deformation of the male pipe part.
Claim 2
Dependent Claim
234 words
A pipe connection comprising a female pipe part and a male pipe part, sealing means situated and between and sealingly engaging the female and male parts, annular coupling means of at least the same hardness as the pipe parts for connecting in a tensile stress resistant way the male and female parts, said female part being provided on the inner side thereof with a single annular recess conically tapering inwardly in the direction of the free end of the female pipe part and of a shape and dimensions such that the end of the male pipe part can be slid past the coupling means accommodated in said recess, the surface of the coupling means cooperating in such a way with the outer surface of the wall of the male pipe part, when the male part and the female part move away from each other, that the coupling means are moved thereby with the male part and become wedged between the outer side of the male pipe part and the wall of the recess while forming a tensile stress resistant connection, the free end of a male pipe part being provided with a screw thread which cooperates with a similar screw thread on the cooperating surface of the coupling means, and a sleeve provided in the inner side of male part opposite the coupling means in order to prevent deformation of the male pipe part.
Claim 3
Dependent Claim
36 words
A pipe connection according to claim 1, wherein the coupling means consist of a closed spiral spring and said sealing means are accommodated between the end of the female pipe part and said male pipe part.
Claim 4
Dependent Claim
100 words
A pipe connection according to claim 1 comprising one female pipe part and two male pipe parts wherein the free end of the outer surface of a first male pipe part is provided with a right hand screw thread and the free end of the outer surface of the second male pipe part with a left hand screw thread of about a similar pitch, said female pipe part being provided with a second annular recess, and second annular coupling means are positioned in said second recess and cooperate with the left hand screw thread of the second male pipe part.
Claim 5
Dependent Claim
18 words
A pipe connection according to claim 3, wherein the female and male pipe parts consist of thermoplastic material.
Claim 6
Dependent Claim
13 words
A pipe connection according to claim 4 wherein said thermoplastic material is polyethylene.
Claim 7
Dependent Claim
13 words
A pipe connection according to claim 4 wherein said thermoplastic material is polypropylene.
Claim 8
Dependent Claim
12 words
A pipe connection according to claim 1 wherein said sleeve is metal.
Claim 9
Dependent Claim
41 words
A pipe connection according to claim 1 wherein the coupling means consist of a ring which is longitudinally split and conically constructed and said sealing means are accommodated between the end of the female pipe part and said male pipe part.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |