US3845625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat accumulator
Assignee: US Philips Corp
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Filing: 1972-09-28
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Granted: 1974-11-05
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Expires: 1992-09-28
Abstract
Abstract In combination with a heat accumulating machine or oven a heat accumulator which comprises a eutectic mixture of LiF and fluoride having a melting point of less than 850*C of the group constituted by sodium fluoride and/or magnesium fluoride. 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
2026-10-31 20:18
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: 11
Claim 1
Independent Claim
179 words
In combination a heat accumulator comprising a reservoir which contains an inorganic material having a melting point of less than 850* and wherein the inorganic material consists mainly of a eutectic mixture of lithium fluoride and at least one fluoride selected from the group consisting of sodium fluoride, potassium fluoride, calcium fluoride and magnesium fluoride, potassium fluoride or calcium fluoride being present only in the presence of both sodium fluoride and lithium fluoride or both magnesium fluoride and lithium fluoride, the maximum quantity of potassium fluoride being less than 30 mol percent and the maximum quantity of calcium fluoride being less than 40 mol percent, a hot gas engine having a heater which receives thermal energy from said material, a burner in which is burned fuel in combustion gas to produce thermal energy, duct means for flowing said material (a) through said burner for receiving thermal energy therefrom, (b) to and through said heat accumulator, (c) to and through said heater, and back to said burner, and pump means for urging said material to flow through said duct means.
Claim 2
Dependent Claim
179 words
In combination a heat accumulator comprising a reservoir which contains an inorganic material having a melting point of less than 850* and wherein the inorganic material consists mainly of a eutectic mixture of lithium fluoride and at least one fluoride selected from the group consisting of sodium fluoride, potassium fluoride, calcium fluoride and magnesium fluoride, potassium fluoride or calcium fluoride being present only in the presence of both sodium fluoride and lithium fluoride or both magnesium fluoride and lithium fluoride, the maximum quantity of potassium fluoride being less than 30 mol percent and the maximum quantity of calcium fluoride being less than 40 mol percent, a hot gas engine having a heater which receives thermal energy from said material, a burner in which is burned fuel in combustion gas to produce thermal energy, duct means for flowing said material (a) through said burner for receiving thermal energy therefrom, (b) to and through said heat accumulator, (c) to and through said heater, and back to said burner, and pump means for urging said material to flow through said duct means.
Claim 3
Dependent Claim
171 words
A hot gas engine having a heater in combination with a heat supply for said engine comprising a burner in which is burned fuel in combustion gas to produce thermal energy, means for introducing said fuel and gas thereto, a heat accumulator comprising a reservoir which contains an inorganic material having a melting point of less than 850* and wherein the inorganic material consists mainly of a eutectic mixture of lithium fluoride and at least one fluoride selected from the group consisting of sodium fluoride, potassium fluoride, calcium fluoride and magnesium fluoride, potassium fluoride or calcium fluoride being present only in the presence of both sodium fluoride and lithium fluoride or both magnesium fluoride and lithium fluoride, the maximum quantity of potassium fluoride being less than 30 mol percent and the maximum quantity of calcium fluoride being less than 40 mol percent, duct means for flowing said material successively and cnotinuously through said burner, heat accumulator, and heater, and pump means for causing said material to flow through said duct means.
Claim 4
Dependent Claim
171 words
A hot gas engine having a heater in combination with a heat supply for said engine comprising a burner in which is burned fuel in combustion gas to produce thermal energy, means for introducing said fuel and gas thereto, a heat accumulator comprising a reservoir which contains an inorganic material having a melting point of less than 850* and wherein the inorganic material consists mainly of a eutectic mixture of lithium fluoride and at least one fluoride selected from the group consisting of sodium fluoride, potassium fluoride, calcium fluoride and magnesium fluoride, potassium fluoride or calcium fluoride being present only in the presence of both sodium fluoride and lithium fluoride or both magnesium fluoride and lithium fluoride, the maximum quantity of potassium fluoride being less than 30 mol percent and the maximum quantity of calcium fluoride being less than 40 mol percent, duct means for flowing said material successively and cnotinuously through said burner, heat accumulator, and heater, and pump means for causing said material to flow through said duct means.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 2, wherein the inorganic material consists of a eutectic mixture of lithium fluoride and sodium fluoride.
Claim 6
Dependent Claim
20 words
Apparatus according to claim 2, wherein the inorganic material consists of a eutectic mixture of lithium fluoride and magnesium fluoride.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 2, wherein the inorganic material consists of a eutectic mixture of lithium fluoride, sodium fluoride and calcium fluoride.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 2, wherein the inorganic material consists of a eutectic mixture of lithium fluoride, sodium fluoride and magnesium fluoride.
Claim 9
Dependent Claim
22 words
Apparatus according to claim 2, wherein the inorganic material consists of a eutectic mixture of lithium fluoride, magnesium fluoride and potassium fluoride.
Claim 10
Dependent Claim
132 words
In a heat accumulating oven a heat accumulator comprising a reservoir which contains an inorganic material having a melting point of less than 850* and wherein the inorganic material consists mainly of a eutectic mixture of lithium fluoride and at least one fluoride selected from the group consisting of sodium fluoride, potassium fluoride, calcium fluoride and magnesium fluoride, potassium fluoride or calcium fluoride being present only in the presence of both sodium fluoride and lithium fluoride or both magnesium fluoride and lithium fluoride, the maximum quantity of potassium fluoride being less than 30 mol percent and the maximum quantity of calcium fluoride being less than 40 mol percent, said accumulator being the source of thermal energy for said oven, and means for transferring said thermal energy from said accumulator to said oven.
Claim 11
Dependent Claim
132 words
In a heat accumulating oven a heat accumulator comprising a reservoir which contains an inorganic material having a melting point of less than 850* and wherein the inorganic material consists mainly of a eutectic mixture of lithium fluoride and at least one fluoride selected from the group consisting of sodium fluoride, potassium fluoride, calcium fluoride and magnesium fluoride, potassium fluoride or calcium fluoride being present only in the presence of both sodium fluoride and lithium fluoride or both magnesium fluoride and lithium fluoride, the maximum quantity of potassium fluoride being less than 30 mol percent and the maximum quantity of calcium fluoride being less than 40 mol percent, said accumulator being the source of thermal energy for said oven, and means for transferring said thermal energy from said accumulator to said oven.
References Cited (Backward Citations)
US3029596A
Cited
US3397533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |