US3829107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint
Assignee: CUSTODIS-ECODYNE Inc
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Filing: 1973-01-18
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Granted: 1974-08-13
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Expires: 1993-01-18
Abstract
Abstract A pipe joint including a first pipe having an enlarged hub portion and a second pipe having one of its ends telescopically received in the hub portion of the first pipe. A sealing gasket confined within a circumferential recess in the received end of the second pipe. The sealing gasket has a cross defining a plurality of radially extending labyrinth type fingers. A leading finger means formed integral with one of the labyrinth fingers, extends substantially axially outward from the gasket. The labyrinth fingers have an internal diameter greater than the internal diameter of the hub portion of the first pipe such that as the second pipe is received by the first pipe the labyrinth fingers are axially deformed causing a partial seal at each finger and rotation of the leading finger means towards a radial position so as to result in a double lip seal.
Inventors
- 👤 M Machado
- 👤 J Forchini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:31
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F16L17/025; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3232
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
In a pipe joint comprising a first pipe having an enlarged hub portion at its end, and a second pipe telescopically received in the hub portion of the first pipe having a circumferential recess for receiving a sealing gasket; an improved flexible sealing gasket, comprising: a. an annular base portion substantially filling and confined within said recess against axial movement in both directions, said base portion being of sufficient thickness to substantially retain its initial shape; b. a plurality of labyrinth type fingers formed integral with said base portion and extending radially outward a substantial distaNce therefrom; and c. leading finger means formed integral with one of said labyrinth type fingers and spaced from the free end of said labyrinth type fingers and extending axially outward beyond said base portion; d. said labyrinth type fingers having an external diameter greater than the internal diameter of said hub portion of said first pipe such that as said second pipe is received by said first pipe, said labyrinth fingers are axially deformed causing a partial seal at each finger and the rotation of said leading finger means towards a radial position so as to result in a double lip seal.
Claim 2
Dependent Claim
198 words
In a pipe joint comprising a first pipe having an enlarged hub portion at its end, and a second pipe telescopically received in the hub portion of the first pipe having a circumferential recess for receiving a sealing gasket; an improved flexible sealing gasket, comprising: a. an annular base portion substantially filling and confined within said recess against axial movement in both directions, said base portion being of sufficient thickness to substantially retain its initial shape; b. a plurality of labyrinth type fingers formed integral with said base portion and extending radially outward a substantial distaNce therefrom; and c. leading finger means formed integral with one of said labyrinth type fingers and spaced from the free end of said labyrinth type fingers and extending axially outward beyond said base portion; d. said labyrinth type fingers having an external diameter greater than the internal diameter of said hub portion of said first pipe such that as said second pipe is received by said first pipe, said labyrinth fingers are axially deformed causing a partial seal at each finger and the rotation of said leading finger means towards a radial position so as to result in a double lip seal.
Claim 3
Dependent Claim
48 words
The invention as defined in claim 1 wherein said labyrinth type finger formed integral with said leading finger means being of slightly less length than the labyrinth type finger adjacent thereto so as to facilitate insertion of said second pipe into said hub portion of said first pipe.
Claim 4
Dependent Claim
19 words
The invention as defined in claim 2 wherein said sealing gasket is integrally formed from a resiliently deformable material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |