US3677581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyed joint arrangement for interconnecting pipe sections
Assignee: Individual
•
Filing: 1970-09-30
•
Granted: 1972-07-18
•
Expires: 1990-09-30
Abstract
Abstract Sections of pipe are connected by a keyed joint arrangement. A peripheral groove is formed in the end of one pipe section. An envelope attached to the other pipe section extends longitudinally over the groove. A tongue formed on the envelope mates with the groove to key the pipe sections together in a joint arrangement which limits the longitudinal movement of the pipe sections relative to each other. Gaskets, joint sleeves and unbonded surfaces may be incorporated into the joint arrangement so that the formed joint is flexible and watertight. The joint arrangement is shown incorporated in a composite or encased pipeline and also as a composite or encased joint formed around preformed pipe sections.
Inventors
- 👤 Thomas K Breitfuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:24
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/08; F16L21/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
A joint arrangement for interconnecting first and second pipe sections, comprising: structure defining a groove around the outside periphery of one end of said second pipe section; and a first concrete envelope formed around said first pipe section to extend longitudinally over said groove formed in said second pipe section, said first envelope being attached to said first pipe section whereby said first pipe section and said first envelope move longitudinally as a unit, an inward projecting tongue means formed integrally on the portion of said first concrete envelope overlapping and interengaging said groove whereby to interconnect said first and second pipe sections and limit the longitudinal movement of said pipe sections relative to each other.
Claim 2
Dependent Claim
116 words
A joint arrangement for interconnecting first and second pipe sections, comprising: structure defining a groove around the outside periphery of one end of said second pipe section; and a first concrete envelope formed around said first pipe section to extend longitudinally over said groove formed in said second pipe section, said first envelope being attached to said first pipe section whereby said first pipe section and said first envelope move longitudinally as a unit, an inward projecting tongue means formed integrally on the portion of said first concrete envelope overlapping and interengaging said groove whereby to interconnect said first and second pipe sections and limit the longitudinal movement of said pipe sections relative to each other.
Claim 3
Dependent Claim
80 words
The invention recited in claim 1, including: a second envelope formed around said second pipe section, said first and second envelopes having slots in their adjacent edges for receiving a gasket; and resilient gasket means positioned between the adjacent edges of said first and second envelopes and in said groove, said gasket means having extensions fitted in said slots formed in said first and second concrete envelopes whereby a watertight seal is formed between said first and second concrete envelopes.
Claim 4
Dependent Claim
63 words
The invention recited in claim 2, wherein said envelope is attached to said first pipe section by means of a tongue and groove connection and said first envelope has an inward projecting portion which projects between the adjacent ends of said first and second pipe sections to further limit the longitudinal movement of said first and second pipe sections relative to each other.
Claim 5
Dependent Claim
57 words
The invention recited in claim 1, including: a joint sleeve means embedded in said first pipe section and extending longitudinally over said groove; and resilient gasket means positioned in said groove adjacent said joint sleeve means; and wherein said tongue means mates with said groove against said resilient gasket means whereby to form a flexible watertight joint.
Claim 6
Dependent Claim
92 words
The invention recited in claim 1, wherein: said first pipe section has a groove formed around its outer periphery; said first envelope has a second tongue means mated with the groove formed in the outer periphery of said first pipe section; and including: gasket means mounted in the grooves formed in said first and second pipe sections between the adjacent ends of said first and second pipe sections, respectively, and said second and first tongue means; and a joint sleeve positioned around said gasket means whereby to form a flexible watertight joint.
Claim 7
Dependent Claim
52 words
The invention recited in claim 5, wherein the grooves formed in said first and second pipe sections slope inwardly towards each other so as that said gasket means are wedged by said first and second tongue means and the sloping grooves towards the adjacent ends of said first and second pipe sections.
Claim 8
Dependent Claim
75 words
The invention recited in claim 6, wherein said groove slopes inwardly towards said first pipe section and including a resilient gasket means positioned in said groove between said tongue means and the end of said second pipe section adjacent said first pipe section whereby said gasket means is wedged by said tongue means and said sloping groove against the end of said second pipe section adjacent said first pipe section to form a watertight seal.
Claim 9
Dependent Claim
17 words
THe invention recited in claim 7, wherein said resilient gasket means is formed by a slotted gasket.
Claim 10
Dependent Claim
26 words
The invention recited in claim 1, wherein resilient gasket means are fitted between said first envelope and said pipe sections to form a watertight seal therebetween.
Claim 11
Dependent Claim
78 words
The invention recited in claim 1, including structure defining a second groove around the outer periphery of said first pipe section, said envelope extends over said second groove and includes a second tongue means mating with said second groove, and, wherein: said grooves and tongue means are lubricated to provide a flexible joint; and resilient gasket means are fitted in said grooves between said first and second pipe sections and said envelope to form a watertight seal therebetween.
Claim 12
Dependent Claim
29 words
The invention recited in claim 10, including a joint sleeve positioned within said pipe sections across the junction of the inner pipe surfaces which define a fluid conducting channel.
Claim 13
Dependent Claim
44 words
The invention as recited in claim 1 wherein: said groove and said tongue means are lubricated to provide a flexible joint; and resilient gasket means is fitted in said groove between said second pipe section and said envelope to form a watertight seal therebetween.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |