US3744824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe couplings
Assignee: GRANGES ESSEM SW AB
•
Filing: 1972-06-26
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Granted: 1973-07-10
•
Expires: 1992-06-26
Abstract
Abstract A pipe coupling arrangement in which one end of two pipes being connected together is adapted to be passed over the opposing end of the other pipe, and in which at least one circumferential, radially open groove is arranged in opposing sides of the pipes in coupled position, in which are provided pivotable locking means mounted on a spring ring and adapted to engage the opposing grooves in said pipe ends to prevent the pipes from being separated in a direction opposite to that in which they are coupled.
Inventors
- 👤 E Roos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:49
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/0842
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
229 words
A pipe coupling for joining together two plastic pipes having end portions, one of which, when the pipes are coupled, extends over the other, aligned circumferentially extending grooves being provided on opposed surfaces of the end portions, a recess being provided in one of said grooves, said grooves and said recess being radially open, the coupling comprising a plurality of latching means, each having at one end a curved bearing surface, latching arms extending from said bearing surfaces and having radial abutment surfaces, a resilient ring carrying said latching means in a circumferential array and urging said bearing surfaces into continuous engagement with said recess, the latter conforming to said bearing surfaces and being disposed in the associated groove in one pipe, adjacent one radial end surface of said one groove, said radial end surface including a continuation of one wall of said recess so as to form a generally straight line therewith, and spring means acting between the bottom of said one groove and said latching arms to Snap the latter into the other groove on the other pipe, said other groove having a radial end wall arranged to co-act with said radial abutment surface, wherein said spring means, operative between said bottom of the one groove and said latching arms, ensures that the latter always adopt a position wherein they engage said groove in the other pipe.
Claim 2
Dependent Claim
229 words
A pipe coupling for joining together two plastic pipes having end portions, one of which, when the pipes are coupled, extends over the other, aligned circumferentially extending grooves being provided on opposed surfaces of the end portions, a recess being provided in one of said grooves, said grooves and said recess being radially open, the coupling comprising a plurality of latching means, each having at one end a curved bearing surface, latching arms extending from said bearing surfaces and having radial abutment surfaces, a resilient ring carrying said latching means in a circumferential array and urging said bearing surfaces into continuous engagement with said recess, the latter conforming to said bearing surfaces and being disposed in the associated groove in one pipe, adjacent one radial end surface of said one groove, said radial end surface including a continuation of one wall of said recess so as to form a generally straight line therewith, and spring means acting between the bottom of said one groove and said latching arms to Snap the latter into the other groove on the other pipe, said other groove having a radial end wall arranged to co-act with said radial abutment surface, wherein said spring means, operative between said bottom of the one groove and said latching arms, ensures that the latter always adopt a position wherein they engage said groove in the other pipe.
Claim 3
Dependent Claim
62 words
The pipe coupling according to claim 1, wherein said latching means include cylindrical latching members, said curved bearing surfaces being arranged on respective ones of said cylindrical members, said ring passing axially through said cylindrical members, said latching arms extending substantially tangentially from the region of the associated cylindrical members, remote from said bottom of said one groove provided with said recess.
Claim 4
Dependent Claim
29 words
The pipe coupling according to claim 2, wherein said latching arms include portions remote from said cylindrical members and angled outwardly of said one groove provided with said recess.
Claim 5
Dependent Claim
16 words
The pipe coupling according to claim 3, wherein said latching members are fixed to said ring.
Claim 6
Dependent Claim
18 words
The pipe coupling according to claim 4, wherein said latching members are arranged to pivot on said ring.
Claim 7
Dependent Claim
47 words
The pipe coupling according to claim 5, wherein said spring means include an annular body of resilient material positioned in said one groove provided with said recess, said annular body being accommodated in a circumferential, radially open second recess disposed in said bottom of said one groove.
Claim 8
Dependent Claim
46 words
The pipe coupling according to claim 6, further comprising sealing means arranged between the pipes to be coupled, and located in a second circumferential groove provided in the end portion of the pipe which extends over the other pipe, and axially outwardly of said first-named groove.
References Cited (Backward Citations)
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |