US3918516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas heat exchanger unit
Assignee: Cegelec SA
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Filing: 1972-11-02
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Granted: 1975-11-11
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Expires: 1992-11-02
Abstract
Abstract Compact dedusting heat exchanger, characterized in that the heat exchange unit consists of a superimposing of a certain number of metal lattices, the assembly having the form of a metal conveyor in a closed loop moving continuously, passing through a hot gas compartment then a cold gas compartment.
Inventors
- 👤 Jean Carrasse
- 👤 Jacques Gerard
- 👤 Pierre Pounhet
- 👤 Therese Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:38
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/01; Y10S165/012
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A gas heat exchanger unit comprising, a hot gas compartment and a cold gas compartment, at least one heat exchanger unit in the form of a closed loop metal band mounted for movement through both of said hot and cold gas compartments along first and second paths transverse to the gas flow therethrough, said metal band being formed by a plurality of independent elementary sieves interconnected to form the band and constituted by a plurality of layers of metal lattices, and intermediate compartment disposed between said hot and cold gas compartments traversed by said metal band, cleaning means disposed in said intermediate compartment for removing dust from the band passing therethrough, and means for driving said band along a closed loop path, wherein said cleaning means includes means for intermittently directing jets of gas at high speed onto the band against the opposite surface from the dust deposit.
Claim 2
Dependent Claim
148 words
A gas heat exchanger unit comprising, a hot gas compartment and a cold gas compartment, at least one heat exchanger unit in the form of a closed loop metal band mounted for movement through both of said hot and cold gas compartments along first and second paths transverse to the gas flow therethrough, said metal band being formed by a plurality of independent elementary sieves interconnected to form the band and constituted by a plurality of layers of metal lattices, and intermediate compartment disposed between said hot and cold gas compartments traversed by said metal band, cleaning means disposed in said intermediate compartment for removing dust from the band passing therethrough, and means for driving said band along a closed loop path, wherein said cleaning means includes means for intermittently directing jets of gas at high speed onto the band against the opposite surface from the dust deposit.
Claim 3
Dependent Claim
63 words
A gas heat exchanger unit as defined in claim 1, further including first and second outer compartments disposed adjacent said hot and cold gas compartments on the sides thereof opposite said intermediate compartment in which said means for driving said bank are disposed, at least one of said first and second outer compartments being provided with means for permitting inspection of said band.
Claim 4
Dependent Claim
54 words
A gas heat exchanger unit as defined in claim 1 wherein said elementary sieves are each formed by solid frames enclosing said plurality of layers of metal lattices, said driving means including a pair of drive chains to which each frame of the elementary sieves is fastened in succession to form the metal band.
Claim 5
Dependent Claim
47 words
A gas heat exchanger unit as defined in claim 3 wherein said driving means further includes first and second sets of sprocket wheels engaging said pair of drive chains for driving said band, the links of said drive chains being articulated between successive frames of said sieves.
Claim 6
Dependent Claim
58 words
A gas heat exchanger unit as defined in claim 3 wherein the outer layers of metal lattices of each sieve have a finer mesh than the inner layers, and further including a metal sheet having holes larger than the holes in said metal lattices disposed outside of said lattices on respective sides of the frame of each sieve.
Claim 7
Dependent Claim
37 words
A gas heat exchanger unit as defined in claim 1 wherein said cleaning means further includes means for directing at least one jet of gas against the face of said metal band in an adjustably variable direction.
Claim 8
Dependent Claim
27 words
A gas heat exchanger unit as defined in claim 1 wherein said cleaning means further includes brush means for mechanically brushing the surface of said metal band.
Claim 9
Dependent Claim
37 words
A gas heat exchanger unit as defined in claim 7 wherein said cleaning means further includes means for directing at least one jet of gas against the face of said metal band in an adjustably variable direction.
Claim 10
Dependent Claim
93 words
A gas heat exchanger unit as defined in claim 1 wherein said elementary sieves are formed by a set of transverse elementary strips each constituted by a plurality of metal lattices arranged in at least two superimposed layers, each layer being constituted by a succession of said elementary strips placed end-to-end, the elementary strips of the top layer being staggered in relation to the elementary strips of the bottom layer, each elementary strip of the upper layer being fixed along one of its edges to the bottom elementary layer situated under that edge.
Claim 11
Dependent Claim
35 words
A gas heat exchanger unit as defined in claim 9 wherein each elementary strip of the bottom layer of each sieve is fixed to a pair of drive chains forming part of said drive means.
Claim 12
Dependent Claim
39 words
A gas heat exchanger unit as defined in claim 1 wherein said intermediate compartment includes movable boxes suspended flexibly surrounding the metal band and sealing rings for sealing the entrance and exit openings for the band in said boxes.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |