Patent US3623548A successfully refreshed from Google Patents.
US3623548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary coil for heat exchangers and similar devices equipped with such coil
Assignee: Individual
•
Filing: 1969-09-29
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Granted: 1971-11-30
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Expires: 1989-09-29
Abstract
Abstract A rotary coil for heat exchangers and similar devices, having a substantially airfoil-shaped cross section.
Inventors
- 👤 Ralph W Cook
- 👤 Samuel A Mencacci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:02
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/14; F28F5/00; F28F5/04; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/14; Y10S165/143; Y10S165/144
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
In a heat exchanger, a shell with an inlet and an outlet for the substance to be heated, a rotary shaft in said shell, a hollow heating coil fixed upon said shaft, said coil having an air foil cross section, and heat conductivity reducing means carried upon that surface of the coil which is trailing in relation to a direction of rotation of the coil and the shaft.
Claim 2
Dependent Claim
68 words
In a heat exchanger, a shell with an inlet and an outlet for the substance to be heated, a rotary shaft in said shell, a hollow heating coil fixed upon said shaft, said coil having an air foil cross section, and heat conductivity reducing means carried upon that surface of the coil which is trailing in relation to a direction of rotation of the coil and the shaft.
Claim 3
Dependent Claim
32 words
Improved rotary coil according to claim 1, wherein said means consist of a backing, partially filling the coil in the trailing region thereof, said backing consisting of a slow heat transfer material.
Claim 4
Dependent Claim
20 words
Improved rotary coil according to claim 1, wherein said means consist of an external Teflon coating on said trailing surface.
Claim 5
Dependent Claim
31 words
Improved rotary coil according to claim 1, wherein said coil consists of a round tube to which a formed cap is affixed, said tube and cap defining an airfoil cross section.
Claim 6
Dependent Claim
28 words
Improved rotary coil according to claim 3, wherein passages are provided in said tube wall, whereby the inner space of said tube communicates with that of said cap.
Claim 7
Dependent Claim
26 words
A device according to claim 1, wherein the coil is of airfoil cross section which is angled outwardly from the axis of rotation of the coil.
Claim 8
Dependent Claim
15 words
A device according to claim 1, wherein the coil is mounted in a vertical position.
Claim 9
Dependent Claim
27 words
A device according to claim 7, wherein steam is in the upper region of the coil and condensate led out at the lower end of the coil.
Claim 10
Dependent Claim
20 words
A device according to claim 8, wherein internal barrier plates are provided in the trailing edge region of the coil.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |