US4749031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanging device having baffles and fluorocarbon tubes
Assignee: Nissin Chemical Industry Co Ltd
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Filing: 1987-04-22
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Granted: 1988-06-07
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Expires: 2007-04-22
Abstract
Abstract Heat exchanging device wherein plural number of support plates are provided at a required distance from one another, a plurality of through holes are formed on these support plates, a plurality of spirally corrugated heating tubes of a fluorocarbon resin are put in each of the through holes independently from one another and these heating tubes are held by elastic bushings in the support plates.
Inventors
- 👤 Masafumi Fukumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:17
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; F28D; F28D7/00; F28D7/02; F28D7/024; F28F21/00; F28F21/06; F28F21/062; F28F9/22; F28F2009/222; F28F2009/226; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416; Y10S165/417; Y10S165/418; Y10S165/905
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A heat-exchanging device comprising a horizontal cylindrical drum; a plural number of support plates in the form of a segmental baffle; said baffle ranging perpendicularly into the drum and being disposed in an opposed reversed symmetry relative to an adjacent baffle for providing a serpentine meandering flow path through said drum; said plates having a plurality of through holes arranged as a matrix having a plurality of rows; a plurality of spirally corrugated heating tubes of a fluorocarbon resin passing in parallel, spaced relationship through said matrix of holes in a direction axial to said cylindrical drum; and elastic bushings being supported by the circumferential edges of said holes; said tubes engaging said bushings in tightly sealing contact.
Claim 2
Dependent Claim
118 words
A heat-exchanging device comprising a horizontal cylindrical drum; a plural number of support plates in the form of a segmental baffle; said baffle ranging perpendicularly into the drum and being disposed in an opposed reversed symmetry relative to an adjacent baffle for providing a serpentine meandering flow path through said drum; said plates having a plurality of through holes arranged as a matrix having a plurality of rows; a plurality of spirally corrugated heating tubes of a fluorocarbon resin passing in parallel, spaced relationship through said matrix of holes in a direction axial to said cylindrical drum; and elastic bushings being supported by the circumferential edges of said holes; said tubes engaging said bushings in tightly sealing contact.
Claim 3
Dependent Claim
25 words
The heat-exchanging device as defined in claim 1 wherein the spirally corrugated tubes are of the type having cavities formed spirally on the tube surface.
Claim 4
Dependent Claim
26 words
The heat-exchanging device as defined in claim 1 wherein the spirally corrugated tubes are of the type having elongated concavities and convexities on the tube surface.
Claim 5
Dependent Claim
14 words
The heat-exchanging device as defined in claim 1 wherein the fluorocarbon resin is polytetrafluoroethylene.
References Cited (Backward Citations)
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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) | 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 |