US4302223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air removal device
Assignee: National Aeronautics and Space Administration
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Filing: 1976-02-27
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Granted: 1981-11-24
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Expires: 1996-02-27
Abstract
Abstract This disclosure concerns a device suitable for removing air from water under both zero and one "g" gravity conditions. The device is comprised of a pair of spaced membranes, one being hydrophobic and the other being hydrophilic. The air-water mixture is introduced into the space therebetween, and the selective action of the membranes yields removal of the air from the water.
Inventors
- 👤 Franklin W. Booth
- 👤 Robert A. Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:09
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0031
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A separator device for separating a mixture of gas entrained in water comprising: a hydrophilic porous membrane; a hydrophobic porous membrane; enclosure means forming a fluid chamber including portions of said membranes and means spacing said membranes parallel to each other including a spacer member extending around said portions; input means for directing said mixture to said chamber and including a chamber extending about the spacer and also including a plurality of openings extending through said spacer into the fluid chamber; means for creating a pressure differential across said portion of said hydrophilic porous membrane so as to cause outward flow of said water; and means for creating a pressure differential across said portion of said hydrophobic porous membrane and for creating an outward movement of said gas without overcoming the negative capillary forces which form a water barrier, whereby selective transfer of gas and water through said portions produces separation of said mixture in both zero g and one g environments.
Claim 2
Dependent Claim
162 words
A separator device for separating a mixture of gas entrained in water comprising: a hydrophilic porous membrane; a hydrophobic porous membrane; enclosure means forming a fluid chamber including portions of said membranes and means spacing said membranes parallel to each other including a spacer member extending around said portions; input means for directing said mixture to said chamber and including a chamber extending about the spacer and also including a plurality of openings extending through said spacer into the fluid chamber; means for creating a pressure differential across said portion of said hydrophilic porous membrane so as to cause outward flow of said water; and means for creating a pressure differential across said portion of said hydrophobic porous membrane and for creating an outward movement of said gas without overcoming the negative capillary forces which form a water barrier, whereby selective transfer of gas and water through said portions produces separation of said mixture in both zero g and one g environments.
Claim 3
Dependent Claim
142 words
A separator device for separating a mixture of a gas entrained in a liquid comprising: a hydrophilic porous membrane; a hydrophobic membrane; enclosure means forming a fluid chamber including portions of said porous membranes spaced adjacent and parallel to each other; input means for directing said mixture to said chamber; means for creating a pressure differential across said portion of said hydrophilic porous membrane so as to cause outward flow of said liquid; means for creating a pressure differential across said portion of said hydrophobic porous membrane so as to create an outward movement of said gas without overcoming the negative capillary forces acting on said gas; means positioned between said porous membranes for bringing said mixture into contact with said membranes whereby selective transfer of gas and water through said portions produces separation of said mixture in any environment including space.
Claim 4
Dependent Claim
142 words
A separator device for separating a mixture of a gas entrained in a liquid comprising: a hydrophilic porous membrane; a hydrophobic membrane; enclosure means forming a fluid chamber including portions of said porous membranes spaced adjacent and parallel to each other; input means for directing said mixture to said chamber; means for creating a pressure differential across said portion of said hydrophilic porous membrane so as to cause outward flow of said liquid; means for creating a pressure differential across said portion of said hydrophobic porous membrane so as to create an outward movement of said gas without overcoming the negative capillary forces acting on said gas; means positioned between said porous membranes for bringing said mixture into contact with said membranes whereby selective transfer of gas and water through said portions produces separation of said mixture in any environment including space.
Claim 5
Dependent Claim
16 words
The separator of claim 2 wherein said means positioned between said porous membranes is a screen.
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) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |