US3664413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collection heat exchangers for gaseous fluids in general, particularly heaters of burning air for steam heaters in marine and land installations
Assignee: Ansaldo SpA
•
Filing: 1969-11-10
•
Granted: 1972-05-23
•
Expires: 1989-11-10
Abstract
Abstract A regenerative heat exchanger of the type used in heating air for furnaces by the heat of gaseous combination products comprises a stationary cylindrical casing divided by flat radial walls into a plurality of like compartments. Regenerative material occupies central portions of the compartments while leaving distribution spaces at opposite ends. The cylindrical casing is disposed between two stationary concentric pipe connections at opposite ends of the casing for supplying, transporting and discharging the air and combustion products respectively. Valving of the gas and air successively to the several compartments containing the regenerative material is effected by circular flat plates disposed at opposite ends of the cylindrical casing and between the casing and the pipe connections. Each plate has at least one port for each of the gaseous fluids disposed facing the respective pipe connection. The plates are rotatably supported and are driven in synchronism with one another. Sealing means is provided between the plates, cylindrical casing and pipe connections.
Inventors
- 👤 Carlo Bo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:04
CPC Classifications
F; F28; F28D; F28D17/00; F28D17/02; F02; F02C; F02C7/00; F02C7/08; F02C7/10; F02C7/105; F28G; F28G9/00; F28G9/005; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/037; Y10S165/038; Y10S165/039
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
A regenerative heat exchanger of the type utilizable in heating air for furnaces by the heat of gaseous combustion products and operating through cyclic accumulation and transfer of heat by means of a regenerative material, comprising a stationary cylindrical casing, median flat walls dividing said casing into a plurality of like compartments, regenerative material occupying central portions of said compartments with distribution spaces at opposite ends of each compartment, two stationary concentric pipe connections at each of opposite ends of said cylindrical casing for the separate inlet, transport and discharge of said air and said combustion products, valve means comprising two circular distributor plates rotatably mounted respectively at opposite ends of said cylindrical casing between said casing and said pipe connections respectively, each said plate having at least one port for Said combustion products and at least one port for said air, each port being disposed in the annular zone facing the respective pipe connection, sealing means between said cylindrical casing, plates and pipe connections and means for rotating said two plates in synchronism with one another.
Claim 2
Dependent Claim
177 words
A regenerative heat exchanger of the type utilizable in heating air for furnaces by the heat of gaseous combustion products and operating through cyclic accumulation and transfer of heat by means of a regenerative material, comprising a stationary cylindrical casing, median flat walls dividing said casing into a plurality of like compartments, regenerative material occupying central portions of said compartments with distribution spaces at opposite ends of each compartment, two stationary concentric pipe connections at each of opposite ends of said cylindrical casing for the separate inlet, transport and discharge of said air and said combustion products, valve means comprising two circular distributor plates rotatably mounted respectively at opposite ends of said cylindrical casing between said casing and said pipe connections respectively, each said plate having at least one port for Said combustion products and at least one port for said air, each port being disposed in the annular zone facing the respective pipe connection, sealing means between said cylindrical casing, plates and pipe connections and means for rotating said two plates in synchronism with one another.
Claim 3
Dependent Claim
31 words
A heat exchanger as claimed in claim 1, characterized in that the rotatably mounted circular flat plates each have a double circular flat wall ribbed inside to provide a cellular structure.
Claim 4
Dependent Claim
110 words
A heat exchanger as claimed in claim 1, wherein said sealing means comprises elastic sealing strips projecting from the end edges of the meridian flat walls at the opposite ends of said casing, so as to slide with the inner faces of the rotatably mounted circular flat plates, the inner faces of said rotatably mounted circular flat plates being provided, on their outer periphery, with a first annular rib projecting towards the regenerative material casing, whose outer cylindrical wall is provided on its two ends with projecting elastic sealing strips which slide against said annular rib, facing the regenerative material casing, of said rotatably mounted circular flat plate inner face.
Claim 5
Dependent Claim
96 words
A heat exchanger as claimed in claim 1, wherein the outer face of each rotatably mounted flat circular plate is provided with a peripheral annular rib and with an intermediate annular rib which divides the surface of the corresponding rotatably mounted circular flat plate into two concentric areas with substantially equivalent surface; wherein the edges of each of the two concentric pipe connections, facing said circular flat plates, are provided with projecting elastic sealing strips, so as to slide with said two annular ribs provided on the outer face of the rotatably mounted circular flat plates.
Claim 6
Dependent Claim
118 words
A heat exchanger as claimed in claim 1, wherein the two rotatably mounted flat circular plates comprise, on each of the two concentric zones, their outer faces divided into a pair of openings in the form of an arc of circular crown, which are defined by two radial sectors and two circular arcs; said openings being in each pair equal and diametrically opposite, further, in each rotatably mounted circular flat plate, said pair of openings of a concentric zone being squaring with the opening pair of the other concentric zone, finally said two rotatably mounted flat circular plates being arranged in the exchanger dephased for 90*, so as to have, in axial correspondence, said openings of different type.
Claim 7
Dependent Claim
92 words
A heat exchanger as claimed in claim 1, the two rotatably mounted circular flat plates are provided at their center with a sliding radial carrying bearing; said rotatably mounted circular flat plates being further provided at their outer periphery with a stiffening crown, a circular support resting on a crown and formed of curved rollers with idle radial axis for supporting said rotatably mounted circular flat plates, and a driven circular rack with cylindrical pins at a constant tangential pitch for the synchronous rotation of said two rotatably mounted circular flat plates.
Claim 8
Dependent Claim
60 words
A heat exchanger as claimed in claim 1, wherein said two rotatably mounted circular flat plates are connected by a torsionally rigid tubular axis arranged in a central space provided on the regenerative material casing, a circular rack with cylindrical pins for the rotation of said two rotatably mounted circular flat plates, and a driven pinion for driving said rack.
Claim 9
Dependent Claim
25 words
A heat exchanger as claimed in claim 3, wherein the sliding seals, with elastic sheets, are arranged with a clearance and flexibility against a wall.
Claim 10
Dependent Claim
33 words
A heat exchanger as claimed in claim 5, wherein the portions carrying the elastic sealing strips are fastened in place by screws through holes in order to avoid the necessity of major disassembly.
Claim 11
Dependent Claim
104 words
A heat exchanger as claimed in claim 7, wherein the polar uniformity of the radial clearance from a cold to a hot condition of the above-cited sliding sheet seals is assured with the necessary exActness by centering a system of the inner conduits with respect to outer conduits of the combustion products and heated air, said system consisting of a series of tangential elastic sheets fixed between the crowns of sections closer to the sliding radial seals, and being completed by a generally symmetric connection in the outlet area for said inner conduits through the outer conduits, with the addition of radial auxiliary ribs.
Claim 12
Dependent Claim
25 words
A heat exchanger as claimed in claim 1, wherein each said distributor plate is double and comprises spaced plates connected by walls around said ports.
Claim 13
Dependent Claim
30 words
A heat exchanger as claimed in claim 1, wherein said distributor plates are provided with guide blades associated with said ports to direct the gaseous fluids flowing through said ports.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |