US4749033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manifold and method of manufacturing the same
Assignee: Norsk Hydro ASA
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Filing: 1985-10-31
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Granted: 1988-06-07
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Expires: 2005-10-31
Abstract
Abstract A manifold, especially a supply or receiving tank in a heat exchanger, is provided as an extruded/drawn tube with an outwardly and longitudinally extending protrusion part. Fastening flanges with a size larger than the width of the protrusion part are an integral portion of the protrusion part. The shaped tube with protrusion part is extruded or drawn, and then the protrusion part is perforated to form a plurality of apertures which are transformed in one or more steps by cold deformation into the fastening flanges of desired diameter, shape and length.
Inventors
- 👤 Edvin L. Clausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:56
CPC Classifications
F; F28; F28D; F28D1/00; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; F16; F16L; F16L41/00; F16L41/02; F16L41/03; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49389
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A manifold, particularly for use in a heat exchanger, said manifold comprising: an elongated metallic hollow member having an interior; a protrusion integral with and extending outwardly from the outer surface of said hollow member and extending longitudinally thereof; a plurality of apertures extending through said protrusion and said hollow member into said interior of said hollow member, said apertures being spaced longitudinally of said protrusion and said hollow member; the material of said protrusion around each said aperture being widened in directions outwardly of said aperture and forming an annular fastening flange surrounding said aperture and integral with said protrusion, said protrusion extending between and stiffening adjacent said flanges, each said flange having an outer diameter greater than the thickness of said protrusion in a direction orthogonal to the longitudinal dimension of said hollow member; and said hollow member, said protrusion and said flanges comprising a unitary, integral metallic member free of welds and joints.
Claim 2
Dependent Claim
156 words
A manifold, particularly for use in a heat exchanger, said manifold comprising: an elongated metallic hollow member having an interior; a protrusion integral with and extending outwardly from the outer surface of said hollow member and extending longitudinally thereof; a plurality of apertures extending through said protrusion and said hollow member into said interior of said hollow member, said apertures being spaced longitudinally of said protrusion and said hollow member; the material of said protrusion around each said aperture being widened in directions outwardly of said aperture and forming an annular fastening flange surrounding said aperture and integral with said protrusion, said protrusion extending between and stiffening adjacent said flanges, each said flange having an outer diameter greater than the thickness of said protrusion in a direction orthogonal to the longitudinal dimension of said hollow member; and said hollow member, said protrusion and said flanges comprising a unitary, integral metallic member free of welds and joints.
Claim 3
Dependent Claim
25 words
A manifold as claimed in claim 1, wherein said outer diameter of said flanges is from 1.5 to 5.0 times said thickness of said protrusion.
Claim 4
Dependent Claim
27 words
A manifold as claimed in claim 1, wherein each said flange has at an outer end thereof a collar defined by at least an inner conical surface.
Claim 5
Dependent Claim
21 words
A manifold as claimed in claim 1, wherein the diameter of said apertures is greater than said thickness of said protrusion.
References Cited (Backward Citations)
NL101502C
Cited
US1792928A
Cited
GB390296A
Cited
US1964100A
Cited
US2262627A
Cited
US2550560A
Cited
FR1021535A
Cited
AT197799B
Cited
GB807608A
Cited
FR71148E
Cited
GB857526A
Cited
US3741849A
Cited
FR2234539A1
Cited
GB2072291A
Cited
FR2508138A1
Cited
EP0122392A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |