US3726548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe fitting
Assignee: Elster Perfection Corp
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Filing: 1971-04-29
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Granted: 1973-04-10
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Expires: 1991-04-29
Abstract
Abstract A pipe fitting adapted to connect a section of plastic pipe to a fitting body. The fitting comprises a hollow metallic body into which is disposed a plastic sleeve. An annular ring is disposed within the sleeve. A second sleeve is disposed within the hollow body and is attached to the ring such that a socket is defined by the first and second sleeves. The socket has a transverse dimension slightly in excess of the wall thickness of the plastic pipe so that the pipe may be snugly received within the socket. A gasket and compression nut provide sealing between the plastic pipe and the fitting body.
Inventors
- 👤 S Alewitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:19
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/20; F16L47/04; F16L47/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A fitting comprising: a generally cylindrical hollow body; attaching means to secure a hollow pipe to said body, said attaching means comprising; a first sleeve received within said body and secured thereto, a flange extending generally radially inwardly from said first sleeve, a second sleeve formed from rigid material secured to said flange, said second sleeve being spaced from said first sleeve thus defining an annular socket into which a hollow pipe may be disposed, said socket having a substantially constant transverse dimension in section slightly in excess of the wall thickness of the pipe such that the pipe may be snugly received within said socket, gripping and sealing means adapted to cooperate with said body and the external surface of the pipe in order to retain fluid and the pipe within said body, said first and second sleeves extending axially from said flange with said first sleeve terminating short of said sealing and gripping means and said second sleeve extending completely through said sealing and gripping means.
Claim 2
Dependent Claim
168 words
A fitting comprising: a generally cylindrical hollow body; attaching means to secure a hollow pipe to said body, said attaching means comprising; a first sleeve received within said body and secured thereto, a flange extending generally radially inwardly from said first sleeve, a second sleeve formed from rigid material secured to said flange, said second sleeve being spaced from said first sleeve thus defining an annular socket into which a hollow pipe may be disposed, said socket having a substantially constant transverse dimension in section slightly in excess of the wall thickness of the pipe such that the pipe may be snugly received within said socket, gripping and sealing means adapted to cooperate with said body and the external surface of the pipe in order to retain fluid and the pipe within said body, said first and second sleeves extending axially from said flange with said first sleeve terminating short of said sealing and gripping means and said second sleeve extending completely through said sealing and gripping means.
Claim 3
Dependent Claim
17 words
The invention of claim 1 in which said body is metal and said first sleeve is non-metal.
Claim 4
Dependent Claim
12 words
The invention of claim 2 in which said second sleeve is metal.
Claim 5
Dependent Claim
73 words
The invention of claim 1 in which said gripping and sealing means is defined as; a tapered seat in said body, an elastomeric gasket having a tapered external surface adapted to cooperate with said seat and an internal cylindrical wall adapted to cooperate with the external surface of the pipe, and a compression nut adapted to be threaded onto said body so as to wedge said gasket into said seat and the pipe.
Claim 6
Dependent Claim
23 words
The invention of claim 1 in which said flange is defined as a non-metallic ring disposed within said first sleeve and secured thereto.
Claim 7
Dependent Claim
29 words
The invention of claim 1 in which said first sleeve is secured within said body by means of interlocking annular ribs defined in said body and said first sleeve.
Claim 8
Dependent Claim
40 words
The invention of claim 1 in which said first sleeve, said flange and said second sleeve are secured within said body by means of interlocking annular ribs defined in said body, said first sleeve, said flange and said second sleeve.
References Cited (Backward Citations)
DE192697C
Cited
US1042587A
Cited
FR40656E
Cited
FR854939A
Cited
DE914803C
Cited
GB904639A
Cited
US3578805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |