US3849983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant liner for active cooling
Assignee: Boeing North American Inc
•
Filing: 1972-11-20
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Granted: 1974-11-26
•
Expires: 1992-11-20
Abstract
Abstract This invention is directed to a device for actively cooling the propellant grain of a missile during captive or free flight when aerodynamic heating conditions are present. The device consists of a helically arranged coolant coil embedded in a liner that separates the missile propellant from the missile case.
Inventors
- 👤 C Cherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:38
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A device for cooling the solid propellant grain of a missile carried aloft by an aircraft during captive and free flight comprising: a solid propellant grain, a liner disposed about the length of said solid propellant grain between said grain and a missile case, a spirally wrapped conduit means disposed in said liner along its entire length, a source of cooling fluid from said aircraft, said cooling fluid being directed through said conduit to cool said solid propellant grain, and quick disconnect means in said conduit between said aircraft and said missile to assure release of said missile from said aircraft.
Claim 2
Independent Claim
101 words
A device for cooling the solid propellant grain of a missile carried aloft by an aircraft during captive and free flight comprising: a solid propellant grain, a liner disposed about the length of said solid propellant grain between said grain and a missile case, a spirally wrapped conduit means disposed in said liner along its entire length, a source of cooling fluid from said aircraft, said cooling fluid being directed through said conduit to cool said solid propellant grain, and quick disconnect means in said conduit between said aircraft and said missile to assure release of said missile from said aircraft.
Claim 3
Dependent Claim
36 words
The invention as set forth in claim 1 further including vent valve means connected to said conduit to control the emission of evaporating cooling fluid from said conduit means when said missile is in free flight.
Claim 4
Independent Claim
65 words
A device for cooling the solid propellant grain of a missile motor in captive and free flight comprising: a liner disposed between said solid propellant grain and a motor case, at least one conduit means disposed within said liner, said conduit means having an inlet and an outlet therein, and a source of cooling fluid directed through said conduit to cool said solid propellant grain.
Claim 5
Independent Claim
65 words
A device for cooling the solid propellant grain of a missile motor in captive and free flight comprising: a liner disposed between said solid propellant grain and a motor case, at least one conduit means disposed within said liner, said conduit means having an inlet and an outlet therein, and a source of cooling fluid directed through said conduit to cool said solid propellant grain.
Claim 6
Dependent Claim
67 words
The invention as set forth in claim 3 wherein said conduit means disposed in said liner is spirally wrapped about the periphery of the propellant grain and extends from adjacent a first end thereof to the other end, said conduit having a return path within said liner returning to said first end, and valve means attached to said conduit means and said source to control coolant flow.
Claim 7
Dependent Claim
25 words
The invention as set forth in claim 4 wherein said valve means entraps said coolant within said conduit means during free flight of said missile.
References Cited (Backward Citations)
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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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |