Patent US3661184A successfully refreshed from Google Patents.
US3661184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular construction
Assignee: Benteler Deutschland GmbH
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Filing: 1969-10-10
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Granted: 1972-05-09
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Expires: 1989-10-10
Abstract
Abstract An elongated tubular member having open ends with radial end faces surrounding the respective open ends. A corrosion-resistant and protective plug member having a flange portion is received in each of the open ends with the flange portion overlying the respective radial end face. An insulating jacket surrounds the tubular member and has its end portions formed into radially inwardly extending circumferential beads which abut against and are sealed to the respective flange portions of the plug members so as to fixedly secure the latter in the open ends.
Inventors
- 👤 Wilhelm Lachenmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:39
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C65/00; B29C65/56; B29C65/565; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/13; B29C66/131; B65; B65D; B65D59/00; B65D59/02; B65D59/06; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/1063; F16L59/00; F16L59/14; F16L59/143
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
An article of the character described, comprising an elongated tubular member having smooth inner and outer surfaces of uniform diameter throughout the length of the tubular member and opposite open ends and a radial end face surrounding each of said opposite ends; insert means closing each of said open ends and including a cup-shaped portion received in the open end and an annular portion overlying said radial end face; and jacket means tightly surrounding said outer surface of the tubular member over the whole length of the latter for insulating said tubular member, said jacket means having end portions adjacent said open ends and each provided with a radially inwardly extending circumferential bead abutting against the annular portion of the respective insert means and confining said annular portion between said radial end face and said bead.
Claim 2
Dependent Claim
136 words
An article of the character described, comprising an elongated tubular member having smooth inner and outer surfaces of uniform diameter throughout the length of the tubular member and opposite open ends and a radial end face surrounding each of said opposite ends; insert means closing each of said open ends and including a cup-shaped portion received in the open end and an annular portion overlying said radial end face; and jacket means tightly surrounding said outer surface of the tubular member over the whole length of the latter for insulating said tubular member, said jacket means having end portions adjacent said open ends and each provided with a radially inwardly extending circumferential bead abutting against the annular portion of the respective insert means and confining said annular portion between said radial end face and said bead.
Claim 3
Dependent Claim
37 words
An article as defined in claim 1, wherein said cup-shaped portion has a closed end and an open end adjacent said annular portion, and wherein said cup-shaped portion is tapered in direction of said closed end thereof.
Claim 4
Dependent Claim
26 words
An article as defined in claim 2, wherein said closed end includes an end wall which tapers substantially conically in direction away from said open end.
Claim 5
Dependent Claim
25 words
An article as defined in claim 2, wherein said closed end includes an end wall which is curved in direction away from said open end.
Claim 6
Dependent Claim
26 words
An article as defined in claim 2, wherein said annular portion has an outer diameter substantially equal to the outer diameter of said radial end face.
Claim 7
Dependent Claim
26 words
An article as defined in claim 2, wherein said tapered cup-shaped portion has an outer diameter slightly larger than the inner diameter of said inner surface.
Claim 8
Dependent Claim
41 words
An article as defined in claim 1, wherein said insert means includes an end wall and a circumferential wall adjacent said annular portion, and wherein said end wall is of a thickness substantially smaller than the thickness of said circumferential wall.
Claim 9
Dependent Claim
17 words
An article as defined in claim 1, wherein said insert means is made of a corrosion-resistant material.
Claim 10
Dependent Claim
18 words
An article as defined in claim 8, wherein said insert means is made of a synthetic plastic material.
Claim 11
Dependent Claim
18 words
An article as defined in claim 1, wherein said jacket means is a layer of synthetic plastic material.
Claim 12
Dependent Claim
34 words
An article as defined in claim 1, wherein said circumferential bead of said jacket means and said annular portions of said insert means are secured to each other and constitute an air tight seal.
References Cited (Backward Citations)
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Cited
US2870906A
Cited
US2940627A
Cited
US3104681A
Cited
US3109549A
Cited
US3200984A
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |