Patent US3858802A successfully refreshed from Google Patents.
US3858802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid heating system
Assignee: Individual
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Filing: 1972-10-03
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Granted: 1975-01-07
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Expires: 1992-10-03
Abstract
Abstract A fluid heating system primarily for central heating systems in which substantially all of the output energy from a combustion engine is utilised by driving a heat pump with the engine, and passing the fluid through the engine cooling system to absorb ''''waste'''' heat as well as through the heat pump, in which it absorbs heat from the atmosphere. Since a larger proportion of the ''''waste'''' output energy of a Stirling external combustion engine goes into the cooling fluid rather than the exhaust gases, this type of engine is used in the preferred forms of the invention.
Inventors
- 👤 Andrew Ferrand Stobart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F24; F24D; F24D11/00; F24D11/02; F24D18/00; F24D2101/00; F24D2101/80; F24D2200/00; F24D2200/16; F24D2200/26; Y; Y02; Y02B; Y02B30/00; Y02B30/52
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
Apparatus for heating a fluid comprising: a. A Stirling cycle hot gas engine including at least one fuelheated head and cylinder, housing piston and displacer means operatively located with respect to duct means communicating with both sides of the displacer means, and the engine having a surrounding integrally connected cooling system for receiving fluid; b. a Stirling cycle heat pump including at least one head and cylinder housing piston and displacer means operatively located with respect to duct means communicating with both sides of the displacer means, and the pump having a surrounding integrally connected heat transfer circuit for receiving fluid; c. drive means interconnecting said piston and displacer means such that the engine drives the pump; and d. fluid circuit means for containing and circulating said fluid, the fluid circuit means connecting the integral cooling system of the engine and the integral heat transfer circuit of the pump directly in series.
Claim 2
Dependent Claim
152 words
Apparatus for heating a fluid comprising: a. A Stirling cycle hot gas engine including at least one fuelheated head and cylinder, housing piston and displacer means operatively located with respect to duct means communicating with both sides of the displacer means, and the engine having a surrounding integrally connected cooling system for receiving fluid; b. a Stirling cycle heat pump including at least one head and cylinder housing piston and displacer means operatively located with respect to duct means communicating with both sides of the displacer means, and the pump having a surrounding integrally connected heat transfer circuit for receiving fluid; c. drive means interconnecting said piston and displacer means such that the engine drives the pump; and d. fluid circuit means for containing and circulating said fluid, the fluid circuit means connecting the integral cooling system of the engine and the integral heat transfer circuit of the pump directly in series.
Claim 3
Dependent Claim
27 words
Apparatus as claimed in claim 1, wherein said fluid circuit means includes radiator means through which fluid from the cooling system and heat transfer circuit is circulated.
Claim 4
Dependent Claim
30 words
Apparatus as claimed in claim 2, wherein said fluid circuit means includes a fluid circulating pump in series with said radiator means, said cooling system and said heat transfer circuit.
Claim 5
Dependent Claim
23 words
Apparatus as claimed in claim 1, including a common crank case connecting said engine and said heat pump and housing said drive means.
Claim 6
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein said drive means includes a crank shaft, and multiple connecting rods respectively connecting said piston means and said displacer means to said crankshaft.
Claim 7
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein the cylinder of the engine and the heat pump are horizontally opposed and supported on a common crank case housing said drive means.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |