US3744738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero gravity liquid transfer screen
Assignee: National Aeronautics and Space Administration
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Filing: 1971-09-16
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Granted: 1973-07-10
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Expires: 1991-09-16
Abstract
Abstract A liquid transfer device for use in a zero gravity environment, such as outer space, for transferring liquid from one container to another. The device includes a spiral shaped screen type member which is carried in the container for collecting the randomly dispersed liquid in the container and transferring such to an exit port.
Inventors
- 👤 F Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:38
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/40; B64G1/402; F; F17; F17C; F17C13/00; F17C13/008; F17C9/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
In combination with a liquid container in a zero gravity environment such as outer space, a device for transferring liquid from said container through an exit port provided therein, comprising: A. a spiral shaped member rotatably mounted in said container along a longitudinal axis in alignment with said exit port; B. said spiral shaped member being constructed of a material having small perforations therein normally capable of imparting a motion to said liquid by surface tension and frictional forces created therebetween when said material contacts said liquid; C. means for rotating said spiral shaped member to impart said motion of said liquid to direct said liquid out through said exit port; D. said material being constructed so as to permit the passage of said liquid through said small perforations if the pressure buildup created by said spiral shaped member engaging said liquid becomes greater than said surface tension and frictional forces, thereby minimizing undesirable back pressures in said container.
Claim 2
Dependent Claim
159 words
In combination with a liquid container in a zero gravity environment such as outer space, a device for transferring liquid from said container through an exit port provided therein, comprising: A. a spiral shaped member rotatably mounted in said container along a longitudinal axis in alignment with said exit port; B. said spiral shaped member being constructed of a material having small perforations therein normally capable of imparting a motion to said liquid by surface tension and frictional forces created therebetween when said material contacts said liquid; C. means for rotating said spiral shaped member to impart said motion of said liquid to direct said liquid out through said exit port; D. said material being constructed so as to permit the passage of said liquid through said small perforations if the pressure buildup created by said spiral shaped member engaging said liquid becomes greater than said surface tension and frictional forces, thereby minimizing undesirable back pressures in said container.
Claim 3
Dependent Claim
22 words
The device as set forth in claim 1 wherein: A. said material consists of a woven metallic wire defining a perforated screen.
References Cited (Backward Citations)
US2617273A
Cited
US3093271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |