Patent US3751953A successfully refreshed from Google Patents.
US4012985A
Expired / Lapsed
US
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Multiple launcher
Assignee: Individual
•
Filing: 1975-02-26
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Granted: 1977-03-22
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Expires: 1995-02-26
Abstract
Abstract A multiple barrel launcher for simultaneous launching of a number of projectiles by means of gas generated by a propellant charge placed in a pressure cartridge in communication with said barrels via a pressure chamber, wherein the communication comprises channels between each of the barrels and the pressure chamber, each of these channels being so dimensioned in relation to the charge that a critical driving gas flow velocity is obtained during the launching course.
Inventors
- 👤 Arnold Ingemar Magnusson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:59
CPC Classifications
F; F42; F42B; F42B4/00; F42B4/24; F42B5/00; F42B5/02; F42B5/145; F42B5/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
Apparatus for launching a plurality of projectiles, comprising a. a cavity having bottom, side and top wall portions; b. a receptacle in communication with the cavity for receiving a cartridge providing on its explosion a gas pressure in the cavity; c. a plurality of barrels for receiving projectiles, the barrels being mounted on the top wall portion of the cavity in proximity to one another, at least one of the barrels having an elevation which differs from the elevation of at least one other barrel; d. a plurality of channels extending through the top wall portion, each channel connecting one of the barrels with the cavity and forming flow paths for said gas pressure from the cavity to the barrels for propelling said projectiles out of the barrels, at least one of the channels having a cross-sectional area which differs from the cross-sectional area of at least one other channel; e. the cross-sectional area of each of the channels being substantially smaller than that of the respective barrel associated therewith, thereby causing the gas flow from the cavity into each barrel to reach critical velocity during at least part of the launching course.
Claim 2
Dependent Claim
193 words
Apparatus for launching a plurality of projectiles, comprising a. a cavity having bottom, side and top wall portions; b. a receptacle in communication with the cavity for receiving a cartridge providing on its explosion a gas pressure in the cavity; c. a plurality of barrels for receiving projectiles, the barrels being mounted on the top wall portion of the cavity in proximity to one another, at least one of the barrels having an elevation which differs from the elevation of at least one other barrel; d. a plurality of channels extending through the top wall portion, each channel connecting one of the barrels with the cavity and forming flow paths for said gas pressure from the cavity to the barrels for propelling said projectiles out of the barrels, at least one of the channels having a cross-sectional area which differs from the cross-sectional area of at least one other channel; e. the cross-sectional area of each of the channels being substantially smaller than that of the respective barrel associated therewith, thereby causing the gas flow from the cavity into each barrel to reach critical velocity during at least part of the launching course.
Claim 3
Dependent Claim
54 words
Apparatus according to claim 1, including support means inside each barrel for supporting a projectile loaded therein in a position providing clerance between the top of the channel associated with said barrel and the trailing end of said projectile, said clearance having a length at least equal to the diameter of the respective barrel.
Claim 4
Dependent Claim
180 words
Apparatus for launching a plurality of projectiles, comprising a. a cavity having bottom, side and top wall portions; b. a receptacle in communication with the cavity for receiving a cartridge providing on its explosion a gas pressure in the cavity; c. a plurality of barrels for receiving projectiles, the barrels being mounted on the top wall portion of the cavity in proximity to one another and projecting from said wall portion; d. a plurality of channels extending through the top wall portion, each channel connecting one of the barrels with the cavity and forming flow paths for said gas pressure from the cavity to the barrels for propelling said projectiles out of the barrels; e. the cross-sectional area of each of the channels being substantially smaller than that of the respective barrel associated therewith, thereby causing the gas flow from the cavity into each barrel to reach critical velocity during at least part of the launching course; f. at least one of the channels having a cross-sectional area which differs from the cross-sectional area of at least one other channel.
Claim 5
Dependent Claim
180 words
Apparatus for launching a plurality of projectiles, comprising a. a cavity having bottom, side and top wall portions; b. a receptacle in communication with the cavity for receiving a cartridge providing on its explosion a gas pressure in the cavity; c. a plurality of barrels for receiving projectiles, the barrels being mounted on the top wall portion of the cavity in proximity to one another and projecting from said wall portion; d. a plurality of channels extending through the top wall portion, each channel connecting one of the barrels with the cavity and forming flow paths for said gas pressure from the cavity to the barrels for propelling said projectiles out of the barrels; e. the cross-sectional area of each of the channels being substantially smaller than that of the respective barrel associated therewith, thereby causing the gas flow from the cavity into each barrel to reach critical velocity during at least part of the launching course; f. at least one of the channels having a cross-sectional area which differs from the cross-sectional area of at least one other channel.
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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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |