US4258625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball-actuated tubular projectile
Assignee: Individual
•
Filing: 1979-05-08
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Granted: 1981-03-31
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Expires: 1999-05-08
Abstract
Abstract A spin-velocity actuated ball valve in a hollow-nose, hollow base projectile is positioned to selectively close or open a projectile. In the closed position normal propellant pressure or projectile carried propellant causes the projectile to achieve operational velocity. In the open position a conduit through the projectile reduces frontal area and tail drag caused by turbulence.
Inventors
- 👤 William L. Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
90 words
A projectile comprising: a tubular body dimensioned to interact with a gun barrel to produce projectile spin and having a nose portion and a base portion and a longitudinally extending passage extending therethrough connecting said nose and base portions so as to permit gas flow through said passage as well as around said tubular body, and spherical ball valve means mounted within said longitudinally extending passage between said nose and base portions and movably contained therein for selectively controlling said gas flow in response to the spin of said projectile.
Claim 2
Dependent Claim
90 words
A projectile comprising: a tubular body dimensioned to interact with a gun barrel to produce projectile spin and having a nose portion and a base portion and a longitudinally extending passage extending therethrough connecting said nose and base portions so as to permit gas flow through said passage as well as around said tubular body, and spherical ball valve means mounted within said longitudinally extending passage between said nose and base portions and movably contained therein for selectively controlling said gas flow in response to the spin of said projectile.
Claim 3
Dependent Claim
19 words
A projectile according to claim 1 wherein said longitudinally extending passage tapers inwardly from said nose and base portions.
Claim 4
Dependent Claim
16 words
A projectile according to claim 1 wherein said nose and base portions are telescopically fitted together.
Claim 5
Dependent Claim
16 words
A projectile according to claim 1 wherein said spherical ball valve means comprises an apertured sphere.
Claim 6
Dependent Claim
34 words
A projectile according to claim 4 in which said apertured sphere is held in a fixed position with the aperture thereof out of communication with said longitudinally extending passage to form a obturation thereof.
Claim 7
Dependent Claim
17 words
A projectile according to claim 5 wherein the aforesaid nose and base portions are telescopically fitted together.
Claim 8
Dependent Claim
26 words
A projectile according to claim 5 wherein the aforesaid longitudinally extending passage is configured to include two surfaces tapering inwardly from said nose and base portions.
Claim 9
Dependent Claim
22 words
A projectile according to claim 1 further including a propellant carried with said passage and in the base portion of said projectile.
Claim 10
Dependent Claim
21 words
A projectile according to claim 5 further including a propellant contained within said base portion and afixed to said apertured sphere.
Claim 11
Dependent Claim
99 words
A projectile comprising: a body extending circumferentially about a longitudinal axis dimensioned to interact with a gun barrel to produce projectile spin and having a nose and a base on opposite ends thereof and an outer surface; an inner surface defining a void within said body and extending along said nose and said base thereby providing a passage therethrough; and substantially spherical ball valve means positioned within said void to be supported and carried within said body and movable in response to the spin of said projectile between first and second positions for controlling gas flow through said passage.
Claim 12
Dependent Claim
99 words
A projectile comprising: a body extending circumferentially about a longitudinal axis dimensioned to interact with a gun barrel to produce projectile spin and having a nose and a base on opposite ends thereof and an outer surface; an inner surface defining a void within said body and extending along said nose and said base thereby providing a passage therethrough; and substantially spherical ball valve means positioned within said void to be supported and carried within said body and movable in response to the spin of said projectile between first and second positions for controlling gas flow through said passage.
Claim 13
Dependent Claim
15 words
A projectile according to claim 10 wherein said obturator means further includes a hermetic seal.
Claim 14
Dependent Claim
13 words
A projectile according to claim 10 wherein said obturator means includes a propellant.
Claim 15
Dependent Claim
15 words
A projectile according to claim 10 wherein said obturator means includes an apertured spherical valve.
Claim 16
Dependent Claim
19 words
A projectile according to claim 13 wherein said apertured spherical valve is held against rotation by a releasable agent.
Claim 17
Dependent Claim
26 words
A projectile according to claim 13 wherein said apertured spherical valve is positioned to have the apertured valve asymetrically positioned with respect to said longitudinal axis.
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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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |