US3922768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a heat exchanger
Assignee: Individual
•
Filing: 1974-06-26
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Granted: 1975-12-02
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Expires: 1994-06-26
Abstract
Abstract A heat exchanger of the type characterized by a plurality of pipes serving as the heat exchange component and connected at their opposite ends to a pair of end plates is formed without welding or brazing by inserting the tip portions of each of the pipes into holes bored into the end plates and then pressing inwardly on the peripheries of the end plates to plastically deform the end plates and thereby secure the pipes therein in tightly sealed relation with the holes bored in the end plates.
Inventors
- 👤 Kiyotelu Takayasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:16
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; B; B21; B21D; B21D39/00; B21D39/06; B21D53/00; B21D53/02; B21D53/06; F28F9/0219; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A method for manufacturing heat exchangers having a plurality of pipes as the heat exchanging component and opposing end plates to which the pipes are connected, comprising the steps of: inserting each tip portion of each of said pipes into holes bored in said end plates; and subjecting the end plates to plastic deformation by pressing inwardly and uniformly on the peripheries of the end plates so that the pipes are thereby secured therein in tightly sealed relationship without welding or brazing.
Claim 2
Independent Claim
82 words
A method for manufacturing heat exchangers having a plurality of pipes as the heat exchanging component and opposing end plates to which the pipes are connected, comprising the steps of: inserting each tip portion of each of said pipes into holes bored in said end plates; and subjecting the end plates to plastic deformation by pressing inwardly and uniformly on the peripheries of the end plates so that the pipes are thereby secured therein in tightly sealed relationship without welding or brazing.
Claim 3
Dependent Claim
50 words
The method as set forth in claim 1, wherein the pipes and end plates are disposed within a cylindrical body before said end plates are subjected to said plastic deformation, and said force for said plastic deformAtion is applied to said end plates and said pipes through the cylindrical body.
Claim 4
Dependent Claim
56 words
The method as set forth in claim 1, wherein each tip portion of each of said pipes is inserted into holes bored in a plurality of end plates disposed adjacent one other, and said forces for said plastic deformation are respectively applied to the peripheries of said plurality of end plates disposed adjacent to each other.
Claim 5
Dependent Claim
30 words
The method as set forth in claim 2, further comprising forming a notch on the peripheries of said end plates before said end plates are disposed in the cylindrical body.
Claim 6
Dependent Claim
31 words
The method as set forth in claim 2, further comprising forming a groove on the inner surface of said cylindrical body before said end plates are disposed in the cylindrical body.
Claim 7
Dependent Claim
23 words
The method as set forth in claim 1, further comprising machining the end plates after subjecting said end plates to said plastic deformation.
Claim 8
Dependent Claim
37 words
The method as set forth in claim 2, further comprising placing a sealing material between the peripheries of said end plates and the inner surface of said cylindrical body before subjecting said end plates to plastic deformation.
Claim 9
Dependent Claim
35 words
The method as set forth in claim 1, further comprising positioning said plastically deformed end plates and pipes in a cylindrical body and welding the cylindrical body to the peripheries of the end plates therein.
References Cited (Backward Citations)
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US513620A
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US2944326A
Cited
US3068160A
Cited
US3279532A
Cited
US3710858A
Cited
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |