US4955435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger fabricated from polymer compositions
Assignee: DuPont Canada Inc
•
Filing: 1988-04-06
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Granted: 1990-09-11
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Expires: 2008-04-06
Abstract
Abstract A panel heat exchanger is disclosed. The heat exchanger comprises a generally planar panel having a pair of relatively thin unitary outer walls formed from a composition of a thermoplastic polymer, expecially a polyamide. The walls, which have a thickness of less than 0.7 mm, are bonded together to form a labryinth of fluid passages between the walls. The passages extend between inlet and outlet means and occupy a substantial proportion of the area of the panel. The heat exchangers are relatively economical to manufacture and may be used in a variety of end uses, depending on the properties of the polymer composition, including in some instances as heat exchangers in automobiles.
Inventors
- 👤 Jerry P. Shuster
- 👤 Anthony J. Cesaroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:45
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28D1/035; F28F21/065; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A panel heat exchanger comprising a generally planar panel having a pair of unitary outer walls of a thickness in the range of 0.12-0.50 mm and formed from a composition of aliphatic polyamide, said unitary outer walls being circumferentially bonded together and further said unitary outer walls being bonded together to define inlet and outlet header areas and a labyrinth of fluid passages extending between the inlet and outlet header areas, said fluid passages occupying a substantial proportion of the area of the panel.
Claim 2
Dependent Claim
84 words
A panel heat exchanger comprising a generally planar panel having a pair of unitary outer walls of a thickness in the range of 0.12-0.50 mm and formed from a composition of aliphatic polyamide, said unitary outer walls being circumferentially bonded together and further said unitary outer walls being bonded together to define inlet and outlet header areas and a labyrinth of fluid passages extending between the inlet and outlet header areas, said fluid passages occupying a substantial proportion of the area of the panel.
Claim 3
Dependent Claim
30 words
The panel heat exchanger of claim 1 in which said outer walls are moulded with channels defining said labyrinth of fluid passages prior to bonding to the other outer wall.
Claim 4
Dependent Claim
20 words
The panel heat exchanger of claim 1 in which the outer walls have a thickness of 0.15 to 0.4 mm.
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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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |