Patent CH136999A successfully refreshed from Google Patents.
US4722261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable ram cannon
Assignee: RTX Corp
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Filing: 1986-09-22
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Granted: 1988-02-02
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Expires: 2006-09-22
Abstract
Abstract A ram cannon (1) has an extendable barrel (2) slidably disposed over a starter cannon barrel (7). Such an extendable barrel is fully retractable during transport of the cannon and extendable at the time of firing. The barrel is also partially extendable, thereby providing a means to vary the muzzle velocity of a projectile (6) without varying the ratio of the fuel to the oxidizer in the propellant mixture. Utilizing an extendable barrel allows adapting a ram cannon to mobile artillery weapons, providing ease in transport, setup and firing, with a precise and rapid range adjustment capability.
Inventors
- 👤 Richard R. Titus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:00
CPC Classifications
F; F41; F41A; F41A1/00; F41A1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A ram cannon of the type adapted for accelerating a projectile therethrough in accordance with ramjet principles, said cannon including a barrel having a bore with a breech end and a muzzle end, and means for sealing said barrel ends, wherein said projectile is accelerated to ramjet takeoff velocity in a starter cannon, entering said ram cannon by passing through said sealed breech end, compressing and combusting a fuel-oxidizer mixture contained within said barrel, such that the gas generated by said combustion further accelerates said projectile through said barrel, the improvement characterized by: said barrel being slidably disposed over said starter cannon and variably locatable thereon, to control the amount of said fuel-oxidizer contained therein, such that said projectile is variably acceleratable therein, said barrel comprising a flared barrel which has a barrel bore increasing in diameter from said breech end to said muzzle end.
Claim 2
Dependent Claim
145 words
A ram cannon of the type adapted for accelerating a projectile therethrough in accordance with ramjet principles, said cannon including a barrel having a bore with a breech end and a muzzle end, and means for sealing said barrel ends, wherein said projectile is accelerated to ramjet takeoff velocity in a starter cannon, entering said ram cannon by passing through said sealed breech end, compressing and combusting a fuel-oxidizer mixture contained within said barrel, such that the gas generated by said combustion further accelerates said projectile through said barrel, the improvement characterized by: said barrel being slidably disposed over said starter cannon and variably locatable thereon, to control the amount of said fuel-oxidizer contained therein, such that said projectile is variably acceleratable therein, said barrel comprising a flared barrel which has a barrel bore increasing in diameter from said breech end to said muzzle end.
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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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |