Patent US3726495A successfully refreshed from Google Patents.
US3726495A
Expired / Lapsed
US
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Projectile
Assignee: Dynamit Nobel AG
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Filing: 1970-01-20
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Granted: 1973-04-10
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Expires: 1990-01-20
Abstract
Abstract A projectile having a continuous axial bore and a cover adapted to drop off provided at the front end of the projectile. The cover is temporarily held on the projectile so as to retain original shape thereof until firing. The front zone of the bore is followed by a zone effective as a jet and having smaller, preferably variable cross-sectional dimensions. The zone of smaller cross-sectional dimensions can pass over into a zone of relatively larger cross-sectional dimensions toward the rear of the projectiles. Spin-braking devices can be provided at the front end of the projectile for limiting the flight range of the projectile to a desired value.
Inventors
- 👤 H Gawlick
- 👤 R Stahlmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:46
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/42; F42B10/00; F42B10/32; F42B10/34
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
149 words
Projectile comprising a projectile body having a front and rear end and a continuous central axial bore extending therethrough from the front to rear end, a cover, clamping means for detachably connecting the cover to the front end of the projectile body and for releasing the cover from the projectile body during the movement of the projectile through the barrel of a firearm, said continuous axial bore including a first zone in the region of the front end of the projectile body having predetermined cross sectional dimensions, a second zone adjoining said first zone for providing a jet effect and having variable cross sectional dimensions smaller than the predetermined dimensions of said first zone, and a third zone in the region of the rear end of the projectile body and adjoining said second zone, said third zone having cross sectional dimensions larger than said dimensions of said second zone.
Claim 2
Dependent Claim
149 words
Projectile comprising a projectile body having a front and rear end and a continuous central axial bore extending therethrough from the front to rear end, a cover, clamping means for detachably connecting the cover to the front end of the projectile body and for releasing the cover from the projectile body during the movement of the projectile through the barrel of a firearm, said continuous axial bore including a first zone in the region of the front end of the projectile body having predetermined cross sectional dimensions, a second zone adjoining said first zone for providing a jet effect and having variable cross sectional dimensions smaller than the predetermined dimensions of said first zone, and a third zone in the region of the rear end of the projectile body and adjoining said second zone, said third zone having cross sectional dimensions larger than said dimensions of said second zone.
Claim 3
Dependent Claim
24 words
Projectile according to claim 1, wherein the second zone of smaller cross-sectional dimensions has varying cross-sectional dimensions at the front and rear portions thereof.
Claim 4
Dependent Claim
24 words
Projectile according to claim 1, wherein step-like, slightly conically shaped shoulder means are provided for effecting the variable cross-sectional dimensions of the second zone.
Claim 5
Dependent Claim
24 words
Projectile according to claim 3, wherein the second zone of smaller cross-sectional dimensions has varying cross-sectional dimensions in the front and rear portions thereof.
Claim 6
Dependent Claim
25 words
Projectile according to claim 1, wherein the front end of said projectile body is substantially flattened and is further provided with at least one depression.
Claim 7
Dependent Claim
26 words
Projectile according to claim 5, wherein primer element means are provided responsive to mechanical stresses for sealing off said at least one depression toward the outside.
Claim 8
Dependent Claim
19 words
Projectile according to claim 6, wherein said primer element means projects beyond the front face of said projectile body.
Claim 9
Dependent Claim
28 words
Projectile according to claim 5, wherein several depressions are provided substantially uniformly distributed over the flattened front portion and are filled with smoke- and/or flash-producing pyrotechnic mixture means.
Claim 10
Dependent Claim
24 words
Projectile according to claim 8, wherein step-like, slightly conically shaped shoulder means are provided for effecting the variable cross-sectional dimensions of the second zone.
Claim 11
Dependent Claim
25 words
Projectile according to claim 8, wherein primer element means are provided responsive to mechanical stresses for sealing off each of said depressions toward the outside.
Claim 12
Dependent Claim
19 words
Projectile according to claim 10, wherein said cover is adapted to protect said primer element means against unintended ignition.
Claim 13
Dependent Claim
19 words
Projectile according to claim 10, wherein said primer element means projects beyond the front face of said projectile body.
Claim 14
Dependent Claim
49 words
Projectile according to claim 1, wherein the continuous axial bore is widened in a step-like manner at the third zone and is provided with flare charge means in such a manner that a central passage is formed therewith which widens approximately conically toward the rear end of said projectile.
Claim 15
Dependent Claim
24 words
Projectile according to claim 13, wherein the second zone of smaller cross-sectional dimensions has varying cross-sectional dimensions in the front and rear portions thereof.
Claim 16
Dependent Claim
20 words
Projectile according to claim 14, wherein step-like, slightly conically shaped shoulder means are provided for effecting the variAble cross-sectional dimensions.
Claim 17
Dependent Claim
44 words
Projectile according to claim 15, wherein the front end of said projectile body is substantially flattened and is further provided with several depressions substantially uniformly distributed over the flattened front portion, and the several depressions being filled with smoke- and/or flash-producing pyrotechnic mixture means.
Claim 18
Dependent Claim
25 words
Projectile according to claim 16, wherein primer element means are provided responsive to mechanical stresses for sealing off each of the depressions toward the outside.
Claim 19
Dependent Claim
38 words
Projectile according to claim 13, wherein the rear end of said projectile is substantially flattened and provided with a plurality of depressions uniformly distributed over the flattened rear portion, and the depressions being filled with flare charge means.
Claim 20
Dependent Claim
31 words
Projectile according to claim 1, wherein spin-braking means are provided at the front end face of said projectile body for limiting the flight range of said projectile to a desired value.
Claim 21
Dependent Claim
30 words
Projectile according to claim 19, wherein said spin-braking means include web-like projections extending in the axial direction of said projectile and being substantially uniformly distributed over the front end face.
Claim 22
Dependent Claim
21 words
Projectile according to claim 20, wherein said web-like projections are disposed radially with respect to the central axis of said projectile.
Claim 23
Dependent Claim
24 words
Projectile according to claim 20, wherein said web-like projections are disposed parallel with respect to a plane passing through the axis of said projectile.
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |