US3726220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge
Assignee: United States Department of the Army
•
Filing: 1971-06-01
•
Granted: 1973-04-10
•
Expires: 1991-06-01
Abstract
Abstract A low impulse sustained power cartridge for an initiator power source of energy to accurately and flexibly control the gas output to a system demand. The cartridge has a metering nozzle or throat constriction mounted in the forward end of the cartridge case adjacent the propellant grain by which a low impulse initial gas pressure is delivered that rounds off at peak pressure to sustain an even slow decay.
Inventors
- 👤 Donald H Mac
- 👤 R Schultz
- 👤 L Pitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/04; B; B60; B60R; B60R22/00; B60R22/34; B60R22/46; B60R22/4628
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A low impulse sustained power cartridge for an initiator comprising, a cartridge case having a forwardly opening propellant chamber and a primer in its rearward end, igniter pellet means in said propellant chamber adjacent said primer, an elongated propellant grain in said chamber and having a central elongated passage therethrough, and metering nozzle means cemented to the forward end of said cartridge case adjacent said propellant grain and in substantial axial alignment with said propellant grain passage, said nozzle means including a metering nozzle member having a central throat constriction intermediate conically tapering approach and exit surfaces, said nozzle means including a rearwardly opening cartridge nozzle case cemented to the forward internal surface of said cartridge case, said nozzle case having a forward centrally apertured base, said metering nozzle member being cemented to the inner sidewall of said nozzle case, and a tape seal intermediate said nozzle member and said nozzle case base overlying the base aperture.
Claim 2
Dependent Claim
157 words
A low impulse sustained power cartridge for an initiator comprising, a cartridge case having a forwardly opening propellant chamber and a primer in its rearward end, igniter pellet means in said propellant chamber adjacent said primer, an elongated propellant grain in said chamber and having a central elongated passage therethrough, and metering nozzle means cemented to the forward end of said cartridge case adjacent said propellant grain and in substantial axial alignment with said propellant grain passage, said nozzle means including a metering nozzle member having a central throat constriction intermediate conically tapering approach and exit surfaces, said nozzle means including a rearwardly opening cartridge nozzle case cemented to the forward internal surface of said cartridge case, said nozzle case having a forward centrally apertured base, said metering nozzle member being cemented to the inner sidewall of said nozzle case, and a tape seal intermediate said nozzle member and said nozzle case base overlying the base aperture.
Claim 3
Dependent Claim
22 words
The structure of claim 1 wherein a plurally apertured pellet retainer is positioned intermediate said pellet means and said elongated propellant grain.
Claim 4
Dependent Claim
40 words
The structure of claim 2 wherein said elongated propellant grain has an inhibitor surrounding its external surface, said inhibitor being cemented to the internal surface of said cartridge case and in longitudinal alignment with said pellet retainer and nozzle case.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |