Patent US5114776A successfully refreshed from Google Patents.
US5114776A
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US
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Corrugated thermoplastic sheet having fluid flow passages
Assignee: Individual
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Filing: 1990-06-28
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Granted: 1992-05-19
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Expires: 2010-06-28
Abstract
Abstract A corrugated sheet formed from a thermoplastic polymer is disclosed. The sheet has a plurality of fluid flow passages through each corrugation. At least one slope, and preferably both slopes, of each corrugation has a plurality of slits in side-by-side arrangement extending through the sheet, with the fluid flow passages being formed by displacement of the thermoplastic polymer between each pair of slits relative to the thermoplastic polymer between the pairs of slits adjacent thereto. One example of use of the corrugated sheet is in a panel heat exchanger, to cause turbulence in fluid passing through the heat exchanger. The preferred thermoplastic polymer is polyamide.
Inventors
- 👤 Anthony J. Cesaroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:14
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12; B; B29; B29C; B29C53/00; B29C53/22; B29C53/24; B29D; B29D16/00; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/24554; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24702
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A corrugated sheet having a plurality of corrugations formed from a thermoplastic polymer composition and having a plurality of fluid-flow passages through each corrugation, each corrugation having peaks and troughs with slopes between them, the slope of each corrugation having a plurality of slits in side-by-side arrangement extending through the sheet, the fluid-flow passages being formed by alternate displacement of the thermoplastic polymer between successive slits and being staggered relative to passages on adjacent corrugations said sheet being flexible, elastomeric and/or compressible,
Claim 2
Dependent Claim
82 words
A corrugated sheet having a plurality of corrugations formed from a thermoplastic polymer composition and having a plurality of fluid-flow passages through each corrugation, each corrugation having peaks and troughs with slopes between them, the slope of each corrugation having a plurality of slits in side-by-side arrangement extending through the sheet, the fluid-flow passages being formed by alternate displacement of the thermoplastic polymer between successive slits and being staggered relative to passages on adjacent corrugations said sheet being flexible, elastomeric and/or compressible,
Claim 3
Dependent Claim
21 words
The corrugated sheet of claim 1 in which the fluid flow passages are staggered in the direction transverse to the corrugations.
Claim 4
Dependent Claim
19 words
The corrugated sheet of claim 1 in which the slits are parallel to the transverse direction of the corrugations.
Claim 5
Dependent Claim
16 words
The corrugated sheet of claim 1 in which the thermoplastic polymer composition is a polyamide composition.
Claim 6
Dependent Claim
20 words
The corrugated sheet of any one of claims 1, 2, 3 or 4 in which the corrugated sheet is self-supporting.
Claim 7
Dependent Claim
15 words
The corrugated sheet of claim 1 in which the corrugations are substantially sinusoidal in cross-section.
Claim 8
Dependent Claim
16 words
The corrugated sheet of claim 1 in which the corrugations resemble a square wave in cross-section.
Claim 9
Dependent Claim
24 words
The corrugated sheet of claim 7 in which the slopes of the corrugations are substantially at right angles to the plane of the sheet.
Claim 10
Dependent Claim
24 words
The corrugated sheet of claim 7 in which the peaks and troughs of each corrugation are substantially parallel to the plane of the sheet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |