US4381712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball-actuated tubular projectile
Assignee: United States Department of the Navy
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Filing: 1981-04-10
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Granted: 1983-05-03
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Expires: 2001-04-10
Abstract
Abstract An improved tubular projectile formed from a single piece body member hav a ball valve resiliently held in a closed position therein and a method of manufacture is disclosed.
Inventors
- 👤 William L. Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:56
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49853
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
102 words
A tubular projectile having an axial bore, comprising: a body having; a tail portion having walls defining said axial bore; a nose portion having relatively thick walls with respect to the walls of said tail portion; a valve seat formed in said nose portion in said thick walls; an apertured spherical ball supported on said valve seat for rotation thereon; a washer contacting said spherical ball valve in opposing relationship to said valve seat; and a cannelure in the walls of said tail portion adjacent said washer for holding said ball valve in a predetermined position and for providing a seal therefor.
Claim 2
Dependent Claim
102 words
A tubular projectile having an axial bore, comprising: a body having; a tail portion having walls defining said axial bore; a nose portion having relatively thick walls with respect to the walls of said tail portion; a valve seat formed in said nose portion in said thick walls; an apertured spherical ball supported on said valve seat for rotation thereon; a washer contacting said spherical ball valve in opposing relationship to said valve seat; and a cannelure in the walls of said tail portion adjacent said washer for holding said ball valve in a predetermined position and for providing a seal therefor.
Claim 3
Dependent Claim
36 words
A tubular projectile according to claim 1 wherein said nose portion has an external surface which tapers forwardly to reduce the wall thickness at the nose thereof to promote aerodynamic gas flow about said tubular projectile.
Claim 4
Dependent Claim
16 words
A tubular projectile according to claim 1 wherein said valve seat has a spherically shaped surface.
Claim 5
Dependent Claim
16 words
A tubular projectile according to claim 1 wherein said washer is made of a resilient material.
Claim 6
Dependent Claim
16 words
A tubular projectile according to claim 4 wherein said resilient material is made of rubber-like material.
Claim 7
Dependent Claim
26 words
A tubular projectile according to claim 1 wherein the walls of said tail portion are coated with a tracer material to enhance tracking of the projectile.
Claim 8
Dependent Claim
26 words
A tubular projectile according to claim 1 wherein the walls of said tail portion are coated with a fumer material to enhance tracking of the projectile.
Claim 9
Dependent Claim
26 words
A tubular projectile according to claim 1 wherein the walls of said tail portion have a cannelure whereby a casing may be crimped to said projectile.
Claim 10
Independent Claim
106 words
A method of making a projectile comprising: forming a tubular body having a thick walled nose portion adjoining a thin walled tail portion; shaping said thick walls at the junction of said nose and tail portions to form a spherically surfaced valve seat; placing an apertured spherical valve on said valve seat in a predetermined position; inserting a resilient washer in said tail portion to rest on said spherical valve; and producing a cannelure in said thin walled tail portion to reduce the axial bore thereof at a position adjacent said washer to compress said washer so as to secure said valve in said predetermined position.
Claim 11
Independent Claim
106 words
A method of making a projectile comprising: forming a tubular body having a thick walled nose portion adjoining a thin walled tail portion; shaping said thick walls at the junction of said nose and tail portions to form a spherically surfaced valve seat; placing an apertured spherical valve on said valve seat in a predetermined position; inserting a resilient washer in said tail portion to rest on said spherical valve; and producing a cannelure in said thin walled tail portion to reduce the axial bore thereof at a position adjacent said washer to compress said washer so as to secure said valve in said predetermined position.
Claim 12
Dependent Claim
18 words
A method of making a projectile according to claim 9 wherein said tubular body is formed by swaging.
Claim 13
Dependent Claim
27 words
A method of making a projectile according to claim 9 wherein said tubular body is formed by machining said nose portion walls and said tail portion walls.
Claim 14
Dependent Claim
20 words
A method of making a projectile according to claim 9 wherein said spherically surfaced valve seat is shaped by grinding.
Claim 15
Dependent Claim
20 words
A method of making a projectile according to claim 9 wherein said spherically surfaced valve seat is shaped by machining.
Claim 16
Dependent Claim
36 words
A method of making a projectile according to claim 9 wherein said aperture spherical valve is placed on said valve seat with the longitudinal axis of the aperture perpendicular to the longitudinal axis of said projectile.
Claim 17
Dependent Claim
22 words
A method of making a projectile according to claim 9 wherein said cannelure is produced by crimping the thin walled tail portion.
Claim 18
Dependent Claim
22 words
A method of making a projectile according to claim 9 wherein said cannelure is produced by rolling said thin walled tail section.
Claim 19
Dependent Claim
27 words
A method of making a projectile according to claim 9 and coating the walls of said tail portion with a tracer material to facilitate tracking said projectile.
Claim 20
Dependent Claim
24 words
A method of making a projectile according to claim 9 and coating said tail portion with a fumer material to facilitate tracking said projectile.
Claim 21
Dependent Claim
29 words
A method of making a projectile according to claim 9 further including the production of a second cannelure in said tail portion for attaching said projectile to a casing.
Claim 22
Dependent Claim
36 words
A method of making a projectile according to claim 19 wherein the step of production of a second cannelure in said tail portion for attaching said projectile to a casing includes crimping said tail section casing.
Claim 23
Dependent Claim
31 words
A method of making a projectile according to claim 19 wherein the step of production of a second cannelure for attaching said projectile to a casing includes rolling said tail section.
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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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |