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US4019868A Expired / Lapsed US ⏱️ 0.0 years remaining

Solar hydrogen generator

Assignee: National Aeronautics and Space Administration
•
Filing: 1976-03-24
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Granted: 1977-04-26
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Expires: 1996-03-24
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Abstract

Abstract An apparatus for using solar energy to manufacture hydrogen by dissociating water molecules into hydrogen and oxygen molecules. Solar energy is concentrated on a globe containing water thereby heating the water to its dissociation temperature. The globe is pervious to hydrogen molecules permitting them to pass through the globe while being essentially impervious to oxygen molecules. The hydrogen molecules are collected after passing through the globe and the oxygen molecules are removed from the globe.

Inventors

  • 👤 Daniel I. Sebacher
  • 👤 Alexander P. Sabol

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 16:29
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/04; C01B3/042; C01B3/045; F; F24; F24S; F24S20/00; F24S20/20; F24S23/00; F24S23/70; F24S23/71; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E60/00; Y02E60/30; Y02E60/36; Y02P; Y02P20/00; Y02P20/10; Y02P20/133

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 238 words
Apparatus for using solar energy to manufacture hydrogen gas by dissociating water molecules into hydrogen and oxygen molecules comprising: an inlet tube means for transporting water; a hollow globe means affixed to one end of said inlet tube means for receiving the water; said globe means being pervious to hydrogen molecules and being impervious to oxygen molecules and undissociated water molecules; an outlet tube means extending into said globe means and being concentrically positioned within said inlet tube means; a reflector means for concentrating solar energy on said globe means thereby heating the water contained in said globe means to the dissociation temperature of said water whereupon the water decomposes into hydrogen and oxygen molecules; the hydrogen molecules permeate through said globe means and the oxygen molecules and undissociated water enter said outlet tube means for removal from said globe means; a collector tube means for collecting the hydrogen molecules after the hydrogen molecules pass through said globe means; said collector tube means having an enlarged closed end which encases said hollow globe means and a tubular length extending from said enlarged closed end concentrically positioned about said inlet tube means; thereby transferring heat from the hydrogen molecules to the water in said inlet tube means and wherein said collector tube means is constructed of material transparent to solar radiation to thereby permit solar radiation to pass through said collector tube means to reach said hollow globe means.
Claim 2
Dependent Claim 238 words
Apparatus for using solar energy to manufacture hydrogen gas by dissociating water molecules into hydrogen and oxygen molecules comprising: an inlet tube means for transporting water; a hollow globe means affixed to one end of said inlet tube means for receiving the water; said globe means being pervious to hydrogen molecules and being impervious to oxygen molecules and undissociated water molecules; an outlet tube means extending into said globe means and being concentrically positioned within said inlet tube means; a reflector means for concentrating solar energy on said globe means thereby heating the water contained in said globe means to the dissociation temperature of said water whereupon the water decomposes into hydrogen and oxygen molecules; the hydrogen molecules permeate through said globe means and the oxygen molecules and undissociated water enter said outlet tube means for removal from said globe means; a collector tube means for collecting the hydrogen molecules after the hydrogen molecules pass through said globe means; said collector tube means having an enlarged closed end which encases said hollow globe means and a tubular length extending from said enlarged closed end concentrically positioned about said inlet tube means; thereby transferring heat from the hydrogen molecules to the water in said inlet tube means and wherein said collector tube means is constructed of material transparent to solar radiation to thereby permit solar radiation to pass through said collector tube means to reach said hollow globe means.
Claim 3
Dependent Claim 16 words
The apparatus as set forth in claim 1 wherein said reflector means is a parabolic mirror.
Claim 4
Dependent Claim 90 words
The apparatus as set forth in claim 1 wherein said outlet tube means is connected to a first pump which maintains the interior of said outlet tube means at a lower pressure than the interior of said globe means thereby increasing the flow of oxygen molecules and undissociated water molecules through said outlet tube means and wherein the concentric arrangement of said inlet and outlet tubes causes heat transfer from the oxygen molecules and undissociated water molecules in said outlet tube means to the water in said inlet tube means.
Claim 5
Dependent Claim 37 words
The apparatus as set forth in claim 3 wherein said collector tube is connected to a second pump which maintains the interior of said collector tube at a lower pressure than the interior of said globe means.
Claim 6
Dependent Claim 23 words
The apparatus as set forth in claim 4 wherein said second pump communicates with a hydrogen storage means for receiving the hydrogen molecules.

References Cited (Backward Citations)

US549765A Cited
US2718457A Cited
US2760920A Cited
US2855274A Cited
US3303105A Cited
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US3785931A Cited
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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) 1980-04-25 1980-10-25 1981-04-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-04-25 1984-10-25 1985-04-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-04-25 1988-10-25 1989-04-26 $7700.00 Window Closed / Lapsed

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