US4085491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar energy heat exchanger and method for making same
Assignee: Individual
•
Filing: 1976-03-01
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Granted: 1978-04-25
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Expires: 1996-03-01
Abstract
Abstract A fluted strip of heat conducting material is spirally wound edgewise about a length of pipe and, in combination, define a heat exchanger for receiving solar energy. The lateral edges of the flutes forming the outer edge of the strip define an undulating line superimposed upon a helix. The lateral edges of the flutes forming the inner edge of the strip define an undulating line superimposed upon a sinusoidal curve which, in turn, is superimposed upon a helix. Thereby, cyclically repetitive ones of the flutes become oriented normal to the rays of the sun to effect maximum heat transfer as the angle of incidence to the heat exchanger varies. A method for producing the heat exchanger is also described.
Inventors
- 👤 Richard G. Mathwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/26; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/26; F; F24; F24S; F24S10/00; F24S10/70; F24S10/75; F24S2010/751; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49355; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A method for manufacturing a heat exchanger from a fluted strip and a pipe, said method comprising the steps of: a. introducing the fluted strip through a feed chute; b. supporting the pipe within an aperture; c. guiding the strip from the feed chute through a spiral trough within the aperture and disposed about the supported pipe; d. securing the beginning of the strip to the pipe with at least one stanchion; e. simultaneously rotating and translating the pipe to draw the strip through the feed chute and trough and spirally wind the strip about the pipe; f. forming the flutes along one edge of the strip to define a line generally representative of a first sinusoidal curve superimposed upon a helix; g. forming simultaneous with step (f) the sinusoidal flutes along another edge of the strip to define a line generally representative of a second sinusoidal curve superimposed upon a helix; h. attaching the terminal end of the strip to the pipe with at least one stanchion.
Claim 2
Independent Claim
168 words
A method for manufacturing a heat exchanger from a fluted strip and a pipe, said method comprising the steps of: a. introducing the fluted strip through a feed chute; b. supporting the pipe within an aperture; c. guiding the strip from the feed chute through a spiral trough within the aperture and disposed about the supported pipe; d. securing the beginning of the strip to the pipe with at least one stanchion; e. simultaneously rotating and translating the pipe to draw the strip through the feed chute and trough and spirally wind the strip about the pipe; f. forming the flutes along one edge of the strip to define a line generally representative of a first sinusoidal curve superimposed upon a helix; g. forming simultaneous with step (f) the sinusoidal flutes along another edge of the strip to define a line generally representative of a second sinusoidal curve superimposed upon a helix; h. attaching the terminal end of the strip to the pipe with at least one stanchion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |