US3718351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe fitting
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1971-08-16
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Granted: 1973-02-27
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Expires: 1991-08-16
Abstract
Abstract A pipe joint for connecting abutting ends of cast iron pipes comprising in a flexible sleeve, such as of rubber which is surrounded by one split socket, under stress, in particular out of cast iron, or a material that corresponds with its elasticity and has a resistance against corrosion that is comparable with that of the pipes to be connected.
Inventors
- 👤 H Bakkerus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; F16L21/02; F16L21/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A pipe fitting foR connecting the abutting ends of pipes, consisting of an elastic circumferentially continuous sealing sleeve surrounding said ends, and an inherently resilient corrosion resistant split socket under stress comprising a castiron cylindrical tube having internal and external concentric surfaces throughout their entire lengths free of any internal and external projections, and the gap of said split extends the full length of said socket and is relatively narrow, the normal unstressed internal diameter of said socket being less than the normal uncompressed external diameter of said sleeve, and said socket being generally equal in length to said sleeve and surrounding and compressing, by its own resiliency only, said sleeve from both sides of and including said abutting ends of said pipes.
Claim 2
Dependent Claim
123 words
A pipe fitting foR connecting the abutting ends of pipes, consisting of an elastic circumferentially continuous sealing sleeve surrounding said ends, and an inherently resilient corrosion resistant split socket under stress comprising a castiron cylindrical tube having internal and external concentric surfaces throughout their entire lengths free of any internal and external projections, and the gap of said split extends the full length of said socket and is relatively narrow, the normal unstressed internal diameter of said socket being less than the normal uncompressed external diameter of said sleeve, and said socket being generally equal in length to said sleeve and surrounding and compressing, by its own resiliency only, said sleeve from both sides of and including said abutting ends of said pipes.
Claim 3
Dependent Claim
21 words
A pipe fitting according to claim 1 wherein the split in the socket is parallel to the axis of said socket.
Claim 4
Dependent Claim
12 words
A pipe fitting according to claim 1 wherein said sleeve is rubber.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |