Inflatable reflector apparatus and method of manufacture

• US 4,672,389 A
• Filed: 05/28/1985
• Issued: 06/09/1987
• Est. Priority Date: 05/28/1985
• Status: Expired due to Fees

• Current Assignee: David N. Ulry
• Original Assignee: David N. Ulry
• Inventors: Ulry, David N.
• Primary Examiner(s): YASICH, DANIEL
• Application Number:
  US06/738,258
• Time in Patent Office: 742 Days
• Field of Search: 343/915, 343/912, 343/880
• US Class Current: 343/915
• CPC Class Codes: F24S 23/81 flexible F24S23/715, F24S23/745 take precedence
• CPC Class Codes: H01Q 15/163 inflatable
• CPC Class Codes: Y02B 10/20 Solar thermal
• CPC Class Codes: Y02E 10/40 Solar thermal energy, e.g. solar towers

Abstract

An inflatable reflector structure used to receive and transmit energy, and a mounting and support system for an inflatable reflector structure, together with a method of constructing a concave parabolic reflective or transparent membrane, capable of being formed into an envelope and inflated. The reflector structure includes an inflatable and collapsible envelope means maintained in configuration by a compression frame member means and by a fluid within the envelope at super ambient surrounding pressure.

Claims

1. An inflatable reflector structure for erection in an ambient atmosphere for wave energy collection, comprising:

a. an inflatable and collapsable envelope means including a substantially fluid impervious reflective membrane surface and a substantially fluid impervious transparent membrane surface, joined together substantially at their peripheral edges, and

b. a compression frame member means inserted within the envelope and joined to the peripheral edges by contact with the interior of the envelope as a result of the pressure in the envelope to provide structural definition for the peripheral edge of the envelope, and

c. an inflation means in communication with the envelope to provide and maintain fluid at above ambient atmospheric pressure within the interior of the envelope.

2. A structure according to claim 1 wherein the reflecting membrane surface is substantially parabolic in form when inflated.

3. A structure according to claim 1 wherein the reflective membrane surface and the transparent membrane surfaces are substantially complimentary in shape and a mirror image in form to provide balance of forces on opposite sides of the joinder of the membranes when the envelope is inflated.

4. A structure according to claim 3 wherein a receiver or collector mounted to the transparent or reflective surface is supported entirely by membrane tension forces in the membrane, created by the compression frame member means at the edges.

5. A structure according to claim 1 wherein the fluid of inflation is air or gas.

6. A structure according to claim 1 wherein the inflation means is a blower or pump.

7. A structure according to claim 1 wherein the fluid impervious transparent membrane is constructed of an optically transparent film.

8. A structure according to claim 1 wherein the fluid impervious transparent membrane is constructed of a laminate of fiber reinforced sheet and protective heat sealable outer surface films.

9. A structure according to claim 1 wherein the substantially fluid impervious reflective membrane is constructed of a laminate of fiber reinforced plastic sheet, metal foil, and protective heat sealable outer surface films materials.

10. A structure according to claim 1 wherein the fluid impervious reflective membrane is constructed of a laminate of fiber reinforced sheet, optically reflective film, and protective heat sealable outer surface film.

11. A structure according to claim 1 wherein the transparent membrane surface is provided with means to support a collector means for wave energy reflected from the reflective membrane surface.

12. A structure according to claim 11 wherein the reflective membrane surface is constructed as an antenna to receive electromagnetic energy, and the collector means is a receiver for the signals reflected from the reflective membrane.

13. An inflatable reflector structure for erection in an ambient atmosphere for wave energy collection, comprising:

a. an inflatable and collapsable envelope means including a substantially fluid impervious reflective membrane surface and a substantially fluid impervious transparent membrane surface, joined together substantially at their peripheral edges, and

b. a compression frame member means of substantially circular or ring shape comprised of a plurality of segments which are joined together and inserted through at least one aperature or slot in the envelope and joined to the peripheral edges to provide structural definition for the peripheral edge of the envelope, and

c. an inflation means in communication with the envelope to provide and maintain fluid at above ambient atmospheric pressure within the interior of the envelope.

14. A structure according to claim 13 wherein the compression frame member means is tubular in construction.

15. A structure according to claim 13 wherein the compression frame member means is provided with at least one support attachment means for projection through the envelope, for the external attachment of supports.

16. A structure according to claim 15 wherein the supporting attachment means is a rotatable clevis fitting.