US3998359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transpiration cooling system having an expulsion bladder
Assignee: McDonnell Douglas Corp
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Filing: 1975-02-04
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Granted: 1976-12-21
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Expires: 1995-02-04
Abstract
Abstract A transpiration cooling system having a conical expulsion bladder for cooling conical re-entry vehicles and other uses. The bladder is of high temperature resistant elastomeric materials such as fabric impregnated silicones and carboxynitroso rubber attached to a housing by a circumferential bead. A transpiration coolant is on one side of the bladder and a source of expansive gases on the other. As the gases expand, the bladder pressures the fluid to move to the tip of the re-entry vehicle where it bleeds off to cool the vehicle on re-entry.
Inventors
- 👤 Ernest M. Pettit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:38
CPC Classifications
F; F42; F42B; F42B15/00; F42B15/34; B; B64; B64G; B64G1/00; B64G1/22; B64G1/46; B64G1/50; B64G1/52; B64G1/58
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A system for pressurizing a working fluid comprising: a truncated conical reservoir having a smaller forward end with an expulsion port therein; a truncated conical elastomeric expulsion bladder over the larger rearward end of said reservoir to contain said working fluid in said reservoir; said bladder being about the same size and shape as said reservoir when not under pressure and adapted to collapse at said larger end to provide maximum fluid volume in said reservoir and to extend under pressure toward said smaller end to push said fluid through said expulsion port; and pressure means subjecting said bladder to pressure from rearward end.
Claim 2
Independent Claim
104 words
A system for pressurizing a working fluid comprising: a truncated conical reservoir having a smaller forward end with an expulsion port therein; a truncated conical elastomeric expulsion bladder over the larger rearward end of said reservoir to contain said working fluid in said reservoir; said bladder being about the same size and shape as said reservoir when not under pressure and adapted to collapse at said larger end to provide maximum fluid volume in said reservoir and to extend under pressure toward said smaller end to push said fluid through said expulsion port; and pressure means subjecting said bladder to pressure from rearward end.
Claim 3
Dependent Claim
51 words
A system for pressurizing a working fluid as in claim 1, said pressure means comprising a gas generator for generating expanding gases, an end cover sealing said larger end from gas leakage, said end cover having a forwardly directed peripheral wall defining a cavity within which said gas generator is positioned.
Claim 4
Dependent Claim
47 words
A system for pressurizing a working fluid as in claim 2, said end cover having a vacuum port therein communicating with said bladder through a conduit in said peripheral wall to collapse said bladder at said larger end and to assist in filling said reservoir with fluid.
Claim 5
Dependent Claim
59 words
A system for pressurizing a working fluid as in claim 1, conical walls extending rearwardly of said reservoir; a bulkhead plate positioned rearwardly of said bladder, said plate having an annular flange abutting the inner surface of said conical walls, said plate having an opening therein through which gases from said generator pass to pressurize and extend said bladder.
Claim 6
Dependent Claim
55 words
A system for pressurizing a working fluid as in claim 4, said opening in said plate having a hot gas port and deflector therein, said deflector having funnel-shaped walls extending forwardly of said plate, and a deflector baffle extending from said walls to shield said bladder from direct impingement by gasses from said gas generator.
Claim 7
Dependent Claim
21 words
A system for pressurizing a working fluid as in claim 5 wherein said deflector baffle has a rearwardly extending lip thereon.
Claim 8
Dependent Claim
45 words
A system for pressurizing a working fluid as in claim 1 wherein said expulsion port has a plurality of radial and circumferential grooves on the inner face thereof to prevent said bladder from plugging up said port when said bladder is in its extended position.
Claim 9
Independent Claim
239 words
A system for pressurizing a working fluid comprising: a truncated conical reservoir having a smaller forward end with an expulsion port therein; a truncated conical elastomeric expulsion bladder over the larger rearward end of said reservoir to contain said working fluid in said reservoir; said bladder being about the same size and shape as said reservoir when not under pressure and adapted to collapse at said larger end to provide maximum fluid volume in said reservoir and to extend under pressure toward said smaller end to push said fluid to said expulsion port; conical walls extending rearwardly of said reservoir; a bulkhead plate positioned rearwardly of said bladder, said plate having an annular flange abutting the inner surface of said conical walls, said plate having an opening therein; a gas generator for generating expanding gases located rearwardly of said plate so that the expanding gases pass through said opening in said plate to pressurize the rearward end of said bladder; a deflector positioned in said opening in said plate, said deflector having funnel-shaped walls extending forwardly of said plate, and a deflector baffle extending from said walls to shield said bladder from direct impingement by gases from said gas generator, said deflector having a tubular wall inserted through said opening in said plate; and a nut to threadedly engage the said tubular wall of said deflector and bear against said plate holding said deflector in position in said plate.
Claim 10
Independent Claim
239 words
A system for pressurizing a working fluid comprising: a truncated conical reservoir having a smaller forward end with an expulsion port therein; a truncated conical elastomeric expulsion bladder over the larger rearward end of said reservoir to contain said working fluid in said reservoir; said bladder being about the same size and shape as said reservoir when not under pressure and adapted to collapse at said larger end to provide maximum fluid volume in said reservoir and to extend under pressure toward said smaller end to push said fluid to said expulsion port; conical walls extending rearwardly of said reservoir; a bulkhead plate positioned rearwardly of said bladder, said plate having an annular flange abutting the inner surface of said conical walls, said plate having an opening therein; a gas generator for generating expanding gases located rearwardly of said plate so that the expanding gases pass through said opening in said plate to pressurize the rearward end of said bladder; a deflector positioned in said opening in said plate, said deflector having funnel-shaped walls extending forwardly of said plate, and a deflector baffle extending from said walls to shield said bladder from direct impingement by gases from said gas generator, said deflector having a tubular wall inserted through said opening in said plate; and a nut to threadedly engage the said tubular wall of said deflector and bear against said plate holding said deflector in position in said plate.
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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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |