Patent US3726320A successfully refreshed from Google Patents.
US3726320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular construction arrangement
Assignee: Benteler Deutschland GmbH
•
Filing: 1972-02-14
•
Granted: 1973-04-10
•
Expires: 1992-02-14
Abstract
Abstract A tubular construction arrangement in which the open ends of at least two elongated tubular members are closed by cup-shaped members having flange portions overlying and abutting against radial endfaces of the tubular members. A pair of opposite axially extending portions of an alignment and spacing member are respectively fitted into the cup-shaped members closing adjacent ends of the tubular members to substantially align the latter, and the alignment and spacing member has a central radial enlargement which is sandwiched between the flange portions of the cup-shaped members. An insulating jacket surrounds the tubular members, the flange portions of the cup-shaped members and the enlargement of the alignment and spacing member.
Inventors
- 👤 W Lachenmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:32
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: 11
Claim 1
Independent Claim
151 words
An arrangement of the character described comprising at least two elongated tubular members having each at least one open end and a radial endface surrounding said open end, said tubular members being substantially aligned with each other along a common axis with the open ends spaced from and facing each other; a pair of cup-shaped insert means closing said open ends and having annular portions respectively overlying the radial endfaces of said two tubular members and being axially spaced from each other; an alignment and spacing member having a pair of opposite axially extending portions respectively tightly fitted into said cup-shaped insert means and a radially extending enlargement between said opposite portions and substantially filling the space between said annular portions of said insert means; and jacket means surrounding and tightly engaging said tubular members, said annular portions of said insert means and said enlargement of said alignment and spacing member.
Claim 2
Dependent Claim
151 words
An arrangement of the character described comprising at least two elongated tubular members having each at least one open end and a radial endface surrounding said open end, said tubular members being substantially aligned with each other along a common axis with the open ends spaced from and facing each other; a pair of cup-shaped insert means closing said open ends and having annular portions respectively overlying the radial endfaces of said two tubular members and being axially spaced from each other; an alignment and spacing member having a pair of opposite axially extending portions respectively tightly fitted into said cup-shaped insert means and a radially extending enlargement between said opposite portions and substantially filling the space between said annular portions of said insert means; and jacket means surrounding and tightly engaging said tubular members, said annular portions of said insert means and said enlargement of said alignment and spacing member.
Claim 3
Dependent Claim
64 words
An arrangement as defined in claim 1, including an outer annular bevel on the annular portion of each insert means and a pair of complementary annular bevels on said radially extending enlargement forming with the bevels on said annular portions a pair of grooves, portions of said jacket means filling said grooves and forming radially inwardly extending circumferential beads sealed to said annular portions.
Claim 4
Dependent Claim
19 words
An arrangement as defined in claim 2, and including a bore extending axially through said alignment and spacing member.
Claim 5
Dependent Claim
40 words
An arrangement as defined in claim 1, wherein each of said cup-shaped insert means has a peripheral wall tightly engaging the inner surface of the respective tubular member and an endwall in the tubular member spaced from the endface thereof.
Claim 6
Dependent Claim
50 words
An arrangement as defined in claim 4, wherein the inner surface of said peripheral wall tapers in direction toward said end wall so that said peripheral wall is at least in part tightly compressed between said inner surface and the respective axial extending portion of the alignment and spacing member.
Claim 7
Dependent Claim
17 words
An arrangement as defined in clAim 5, wherein said insert means is made of synthetic plastic material.
Claim 8
Dependent Claim
22 words
An arrangement as defined in claim 4, wherein said endwall has a wall thickness substantially smaller than that of the peripheral wall.
Claim 9
Dependent Claim
23 words
An arrangement as defined in claim 6, wherein said endwall is curved in direction away from the annular portion of the insert means.
Claim 10
Dependent Claim
30 words
An arrangement as defined in claim 1, wherein the annular portions of said pair of insert means and said enlargement of said alignment and spacing member have substantially equal diameters.
Claim 11
Dependent Claim
36 words
An arrangement as defined in claim 1, wherein said enlargement of said alignment and spacing member is formed with a central circumferential groove, and wherein said jacket means extends with a portion thereof into said groove.
References Cited (Backward Citations)
US2035978A
Cited
US3188117A
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 |