US4068361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-jigging method of fabricating solar collector heat trap from flexible plastic roll material
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1976-01-26
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Granted: 1978-01-17
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Expires: 1996-01-26
Abstract
Abstract A solar energy collector of low cost and high thermal efficiency is disclosed having a heat trap produced by zigzagging a thin strip of polyethylene terephthalate between opposite sides of the trap while wrapping the strip about rows of dowels positioned at opposite sides of the frame of the solar collector. A window of soda lime glass filters UV radiation to inhibit discoloration of the plastic heat trap walls. An absorber plate having fluid pipes therein is positioned underneath the heat trap and a first layer of fiberglass, and a second layer of polyurethane foam are positioned below the absorber plate. The fiberglass layer prevents overheating of the polyurethane foam layer to in turn inhibit the formation of toxic fluids, which may condense upon the underside of the window to reduce the efficiency of the collector.
Inventors
- 👤 Ernest F. Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
F; F24; F24S; F24S80/00; F24S80/60; F24S80/65; F24S10/00; F24S10/50; F24S10/504; F24S80/50; F24S80/52; F24S80/56; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49355
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
A method of fabricating wall portions of the cells of a solar energy heat trap comprising: a. providing a frame having first receptor means associated with one side of said frame for receiving a first plurality of wall support members together with second receptor means associated with the opposite side of said frame for receiving a second plurality of wall support members; b. wrapping a continuous strip of thin, flexible light transmissive wall material about a first wall support member of said first plurality of wall support members and thereafter inserting said first wall support member into said first receptor means, thereafter wrapping said material about a wall support member of said second plurality of wall support members, thereafter inserting said wall support member of said second plurality of wall support members into said second receptor means, thereafter wrapping said material about a second wall support member of said first plurality of wall support members, thereafter inserting said second wall support member into said first receptor means, and so forth to produce zig-zagged wall portions of the cells of said solar energy heat trap; c. inducing tension within said flexible light transmissive wall material after each of the wrapping steps of paragraph (b), thereby to prevent drooping of said material.
Claim 2
Independent Claim
210 words
A method of fabricating wall portions of the cells of a solar energy heat trap comprising: a. providing a frame having first receptor means associated with one side of said frame for receiving a first plurality of wall support members together with second receptor means associated with the opposite side of said frame for receiving a second plurality of wall support members; b. wrapping a continuous strip of thin, flexible light transmissive wall material about a first wall support member of said first plurality of wall support members and thereafter inserting said first wall support member into said first receptor means, thereafter wrapping said material about a wall support member of said second plurality of wall support members, thereafter inserting said wall support member of said second plurality of wall support members into said second receptor means, thereafter wrapping said material about a second wall support member of said first plurality of wall support members, thereafter inserting said second wall support member into said first receptor means, and so forth to produce zig-zagged wall portions of the cells of said solar energy heat trap; c. inducing tension within said flexible light transmissive wall material after each of the wrapping steps of paragraph (b), thereby to prevent drooping of said material.
Claim 3
Dependent Claim
50 words
The method of claim 1 wherein a roll of said thin flexible wall material is passed back and forth between one side of said frame and the opposite side of said frame as the wrapping of said continuous strip of flexible wall material is performed about said wall support members.
Claim 4
Dependent Claim
47 words
The method of claim 2 wherein said continuous strip of thin flexible wall material is wrapped in zigzag fashion about every other wall support member of said first and second plurality of wall members in order that half of said wall support members function as spacer elements.
Claim 5
Dependent Claim
23 words
The method of claim 3 wherein each wall support member is turned into an upright position within said receptor means upon insertion therein.
Claim 6
Dependent Claim
23 words
The method of claim 2 wherein each wall support member is turned into an upright position within said receptor means upon insertion therein.
Claim 7
Dependent Claim
47 words
The method of claim 1 wherein said continuous strip of thin flexible wall material is wrapped in zigzag fashion about every other wall support member of said first and second plurality of wall members in order that half of said wall support members function as spacer elements.
Claim 8
Dependent Claim
23 words
The method of claim 6 wherein each wall support member is turned into an upright position within said receptor means upon insertion therein.
Claim 9
Dependent Claim
23 words
The method of claim 1 wherein each wall support member is turned into an upright position within said receptor means upon insertion therein.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |