Patent US4031881A successfully refreshed from Google Patents.
US4031881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heater
Assignee: Individual
•
Filing: 1975-10-20
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Granted: 1977-06-28
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Expires: 1995-10-20
Abstract
Abstract A solar heater has metal pipes arranged in an array connected to carry liquid which will be heated by heat received from solar radiation transmitted through the pipe walls. The pipes are formed from sheet metal so that their internal and external reflectivity may be controlled. The pipes are provided with a dark exterior on the side which will face the sun.
Inventors
- 👤 Heinz E. P. Thiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:55
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/50; F24S10/502; F24S10/504; F24S10/70; F24S2010/71; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S126/00; Y10S126/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A solar heater comprising: a plurality of liquid conducting metal pipes arranged in an array to receive incident solar radiation from a mean direction on one side of said array, said metal pipes each being formed from sheet metal having a predetermined reflectivity on both sides bent to form a tube, means for connecting to said pipes a liquid conduit connected to supply liquid to said pipes to flow therethrough, means for connecting to said pipes a liquid conduit for carrying away liquid which has flowed through the pipes in said array, said pipes in said array being provided, with a treated heat absorptive surface on the side thereof designed to approximately face the direction of incident solar radiation, the pipes in said array being provided with an inner surface having the reflectivity produced by a surface not coarser than that providing a centre-line average of 60μ".
Claim 2
Dependent Claim
147 words
A solar heater comprising: a plurality of liquid conducting metal pipes arranged in an array to receive incident solar radiation from a mean direction on one side of said array, said metal pipes each being formed from sheet metal having a predetermined reflectivity on both sides bent to form a tube, means for connecting to said pipes a liquid conduit connected to supply liquid to said pipes to flow therethrough, means for connecting to said pipes a liquid conduit for carrying away liquid which has flowed through the pipes in said array, said pipes in said array being provided, with a treated heat absorptive surface on the side thereof designed to approximately face the direction of incident solar radiation, the pipes in said array being provided with an inner surface having the reflectivity produced by a surface not coarser than that providing a centre-line average of 60μ".
Claim 3
Dependent Claim
21 words
A solar heater as claimed in claim 1 wherein said liquid conducting metal pipes are made of brass, copper or bronze.
References Cited (Backward Citations)
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Cited
US2553302A
Cited
CH340987A
Cited
FR1141261A
Cited
US3513828A
Cited
US3934323A
Cited
US3937208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |