US3908936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple fluid flow proportioning system
Assignee: United States Department of the Air Force
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Filing: 1974-10-22
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Granted: 1975-09-30
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Expires: 1994-10-22
Abstract
Abstract A multiple liquid flow proportioning system for use in reentry vehicles with transpiration cooled nose tips (TCNT). The basic system includes: a first reservoir containing coolant; a second reservoir containing the same type or a different coolant; a piston for forcing the coolant from the first reservoir and a piston for forcing the coolant from the second reservoir with both pistons integrated to form a unified structure movable in unison; and, a gas-operated mechanism to actuate the pistons and control the flow of coolants to the TCNT. The system provides for the simultaneous fluid cooling of the nose tip at high pressure and low flow rate and cooling of the nose-skirt area at low pressure and high flow rate with a single control device (e.g., valve).
Inventors
- 👤 Donald A Durran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/58; B64G1/46; B64G1/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
267 words
A multiple fluid flow proportioning system for use with a low angle reentry space vehicle of conical configuration, with said reentry vehicle having a longitudinal axis, a fore end, and an aft end, and with said reentry vehicle also having a nose and a skirt at the fore end, comprising: a. a first cylindrical reservoir having a smaller diameter within said reentry vehicle and containing a fluid coolant for cooling said nose of said reentry vehicle; b. means for directing the controlled flow of said fluid coolant from said first reservoir to said nose of said reentry vehicle; c. a second cylindrical reservoir having a larger diameter within said reentry vehicle and containing a fluid coolant for cooling said skirt of said reentry vehicle, said second reservoir being coaxial with and spaced apart from the said first reservoir; d. means for directing the controlled flow of said fluid coolant from said second reservoir to said skirt of said reentry vehicle; e. a first piston movable through the first reservoir to expel coolant therefrom to the nose of the reentry vehicle; f. a second piston movable through the second reservoir to expel coolant therefrom to the skirt of the reentry vehicle; g. means rigidly interconnecting the first and second pistons for movement in unison; h. a source of pressurized gas; and, i. controlled means admitting gas from said source to one side of the second piston to move said second piston through the second reservoir whereby coolant is simultaneously expelled at a low flow rate and at a high flow rate respectively from the first and second reservoirs.
Claim 2
Dependent Claim
267 words
A multiple fluid flow proportioning system for use with a low angle reentry space vehicle of conical configuration, with said reentry vehicle having a longitudinal axis, a fore end, and an aft end, and with said reentry vehicle also having a nose and a skirt at the fore end, comprising: a. a first cylindrical reservoir having a smaller diameter within said reentry vehicle and containing a fluid coolant for cooling said nose of said reentry vehicle; b. means for directing the controlled flow of said fluid coolant from said first reservoir to said nose of said reentry vehicle; c. a second cylindrical reservoir having a larger diameter within said reentry vehicle and containing a fluid coolant for cooling said skirt of said reentry vehicle, said second reservoir being coaxial with and spaced apart from the said first reservoir; d. means for directing the controlled flow of said fluid coolant from said second reservoir to said skirt of said reentry vehicle; e. a first piston movable through the first reservoir to expel coolant therefrom to the nose of the reentry vehicle; f. a second piston movable through the second reservoir to expel coolant therefrom to the skirt of the reentry vehicle; g. means rigidly interconnecting the first and second pistons for movement in unison; h. a source of pressurized gas; and, i. controlled means admitting gas from said source to one side of the second piston to move said second piston through the second reservoir whereby coolant is simultaneously expelled at a low flow rate and at a high flow rate respectively from the first and second reservoirs.
Claim 3
Dependent Claim
39 words
A system as defined in claim 1 wherein, the first piston is an elongated stem-like member attached to the second piston and cooperates with the first cylindrical reservoir to stabilize the second piston in moving through the second reservoir.
Claim 4
Dependent Claim
36 words
A system as defined in claim 1 wherein, the source of pressurized gas is a liquified gas expanding into gaseous form in passing through the controlled means admitting gas to one side of the second piston.
References Cited (Backward Citations)
US3785591A
Cited
US3808833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |