Patent US2339446A successfully refreshed from Google Patents.
US3580179A
Expired / Lapsed
US
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Ammunition for target practice or other short-range purposes
Assignee: Dynamit Nobel AG
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Filing: 1968-09-06
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Granted: 1971-05-25
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Expires: 1988-09-06
Abstract
Abstract Projectiles designed for practice or other limited-range purposes, including a tip which will disintegrate and/or be jettisoned from the body of the projectile and laterally deflected from the path thereof shortly after exit from the barrel of the firearm, which tip is constructed with a longitudinal cross section deviating from rotational symmetry and/or an annular hollow space surrounding the central core thereof and extending rearward, which hollow space is defined by the outer shell of the tip, having a thickness such that it may be ruptured by the pressure of the propellant gases.
Inventors
- 👤 Heinz Gawlick
- 👤 Rudolf Stahlmann
- 👤 Hans Umback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:20
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
A projectile for practice or other short-range purposes, comprising: 1 projectile body means having a central axial bore therethrough, tip means adapted for locking engagement with said projectile body means at the forward end thereof as viewed in the direction of firing, said tip means being rotationally asymmetric about the central longitudinal axis thereof.
Claim 2
Dependent Claim
54 words
A projectile for practice or other short-range purposes, comprising: 1 projectile body means having a central axial bore therethrough, tip means adapted for locking engagement with said projectile body means at the forward end thereof as viewed in the direction of firing, said tip means being rotationally asymmetric about the central longitudinal axis thereof.
Claim 3
Dependent Claim
75 words
A projectile according to claim 1, wherein said tip means includes central core means and outer jacket means secured thereto in the region of the forward end thereof, said outer jacket means and said central core means defining therebetween an annularly shaped hollow space open in the rearward direction of said projectile, said outer jacket means having a predetermined thickness calculated to rupture under the pressure of the propellant gases upon firing of the projectile.
Claim 4
Dependent Claim
62 words
A projectile according to claim 2, wherein said projectile body means includes a plug-shaped projection at the forward end thereof, said projection having a tapered peripheral surface, said outer jacket means having an oppositely tapered surface at the rearward end thereof which conformingly engages with said plug-shaped projection to produce a snap-lock attachment between said tip means and said projectile body means.
Claim 5
Dependent Claim
39 words
A projectile according to claim 3, wherein said central core means extends into said central axial bore in said projectile body means and is seated therein under pressure when said tip means and said projectile body means are connected.
Claim 6
Dependent Claim
45 words
A projectile according to claim 4, wherein the inner surface of said tip means, bounding said hollow space, includes reinforcing rib means extending substantially in the longitudinal direction of the said projectile over at least a projectile portion of the length of said hollow space.
Claim 7
Dependent Claim
38 words
A projectile according to claim 5, wherein said outer jacket means of said tip means includes a bore therethrough, permitting the flow of gases between said hollow space within said tip means and the exterior of said projectile.
Claim 8
Dependent Claim
34 words
A projectile according to claim 6, wherein said bore through said outer jacket means extends substantially in the axial direction of said projectile and is spaced laterally from the central axis of said projectile.
Claim 9
Dependent Claim
30 words
A projectile according to claim 7, wherein said central core means includes an axial bore therein, said axial bore extending inwardly from said rearward end of said central core means.
Claim 10
Dependent Claim
19 words
A projectile according to claim 8, wherein said tip means is constructed of a relatively low-density synthetic resinous material.
Claim 11
Dependent Claim
136 words
In a projectile for practice or other short-range purposes, including projectile body means having a central bore extending therethrough, the improvement comprising detachable and readily destructible tip means including central core means and outer jacket means, integral with said central core means at the forward end thereof and extending radially outwardly therefrom and rearwardly, thus defining an annularly shaped hollow space between said central core means and said outer jacket means, said hollow space being open in the rearward direction, the rear end of said outer jacket means being provided with means for securing said tip means to said projectile body means prior to firing of the projectile, said outer jacket means having a predetermined wall thickness calculated to ensure rupture of the wall under the pressure of the propellant gases upon firing of the projectile.
Claim 12
Dependent Claim
136 words
In a projectile for practice or other short-range purposes, including projectile body means having a central bore extending therethrough, the improvement comprising detachable and readily destructible tip means including central core means and outer jacket means, integral with said central core means at the forward end thereof and extending radially outwardly therefrom and rearwardly, thus defining an annularly shaped hollow space between said central core means and said outer jacket means, said hollow space being open in the rearward direction, the rear end of said outer jacket means being provided with means for securing said tip means to said projectile body means prior to firing of the projectile, said outer jacket means having a predetermined wall thickness calculated to ensure rupture of the wall under the pressure of the propellant gases upon firing of the projectile.
Claim 13
Dependent Claim
39 words
The improvement according to claim 10, wherein the rear end of said outer jacket means and the forward end of said projectile body means are constructeD as conformingly tapered surfaces which engage in the manner of a snap-lock connection.
Claim 14
Dependent Claim
49 words
The improvement according to claim 11, wherein said outer jacket means is perforated by at least one bore extending therethrough, thus permitting passage of gases through said outer jacket means, said bore extending in a generally axial direction and being spaced laterally from the central axis of said projectile.
Claim 15
Dependent Claim
75 words
The improvement according to claim 12, wherein said central core means extends into the central axial bore of said projectile body means when said tip means is attached thereto, said central core means being dimensioned such that it engages within said central axial bore with slight clamping force, said central core means having a centrally disposed axial bore extending inwardly from the rear end thereof over a portion of the length of said core means.
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |