US3779232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat accumulator
Assignee: US Philips Corp
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Filing: 1971-08-25
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Granted: 1973-12-18
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Expires: 1991-08-25
Abstract
Abstract A heat accumulator comprising a eutectic mixture of NaF and magnesium fluoride having a melting point of less than 850*. The mixture may additionally comprise potassium fluoride and/or calcium fluoride. The heat accumulator is suitable for supplying thermal energy to a hot-gas engine and for use in heat accumulating ovens.
Inventors
- 👤 J Schroder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:26
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; C09K5/08; C09K5/10; C09K5/12; F02G1/057; F22; F22B; F22B1/00; F22B1/02; F22B1/028; F28; F28D; F28D20/00; F28D20/02; F28D20/021; F02G2254/00; F02G2254/30; Y; Y02; Y02E; Y02E60/00; Y02E60/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
22 words
A heat accumulator according to claim 1 wherein the inorganic material consists of a eutectic mixture of sodium fluoride and magnesium fluoride.
Claim 2
Dependent Claim
24 words
A heat accumulator according to claim 1 wherein the inorganic material consists of a eutectic mixture of sodium fluoride, magnesium fluoride and calcium fluoride.
Claim 3
Dependent Claim
24 words
A heat accumulator according to claim 1 wherein the inorganic material consists of a eutectic mixture of sodium fluoride, magnesium fluoride and potassium fluoride.
Claim 4
Dependent Claim
121 words
In combination with a heat accumulator as defined in claim 1 which receives and stores thermal energy from a medium of a higher temperature and discharges thermal energy to a medium of a lower temperature than the temperature of the accumulator, a thermal energy machine which includes a heater part for receiving thermal energy from heat transfer fluid medium, first means for heating said fluid medium, and duct means for transporting said medium to said first heating means for heating the medium, then to said accumulator where thermal energy is transferred between said fluid medium and accumulator in the direction of lower temperature, and to the heater of the machine which receives thermal energy, and back to the first heating means.
Claim 5
Dependent Claim
12 words
Apparatus according to claim 5 wherein said machine is a hot-gas engine.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 6 wherein said heat transfer fluid medium is a liquid alloy.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 7 wherein said fluid is a sodium potassium alloy.
Claim 8
Dependent Claim
18 words
Apparatus according to claim 6 wherein said first heating means burns fuel and air and produces combustion gases.
Claim 9
Dependent Claim
42 words
A heat accumulator as defined in claim 1 formed as a heat accumulating oven, further comprising means for supplying thermal energy to said accumulator-oven which stores at least a portion of said energy, and means for discharging thermal energy from said oven.
References Cited (Backward Citations)
US3080706A
Cited
US3605720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |