US4550662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding projectiles
Assignee: BAUMAN OAKLEY R
•
Filing: 1978-05-03
•
Granted: 1985-11-05
•
Expires: 1998-05-03
Abstract
Abstract There is disclosed a bullet or projectile, which may be fired by a wide variety of guns or other means, with improved accuracy and impact shock, and of a form embodying a generally conventional exterior configuration but having a hollow-point construction including ribs and flutes in the hollow portion which are formed to increase the hydraulic effects of entry into a fluidic target with more complete, uniform flattening and reaming action without reduction in accuracy.
Inventors
- 👤 Thomas J. Burczynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:35
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A bullet having a central body of malleable material including an ogival end in which is provided an integral open cavity of generally frusto-conical form, a series of rib members extending longitudinally and radially inwardly in said cavity, integral with the body and spaced circumferentially therein, said rib members being formed to split and thereafter concentrate forces from incoming fluidic materials to effect expansion of the cavity and thereby flatten the ogival walls upon penetration of a target area.
Claim 2
Dependent Claim
79 words
A bullet having a central body of malleable material including an ogival end in which is provided an integral open cavity of generally frusto-conical form, a series of rib members extending longitudinally and radially inwardly in said cavity, integral with the body and spaced circumferentially therein, said rib members being formed to split and thereafter concentrate forces from incoming fluidic materials to effect expansion of the cavity and thereby flatten the ogival walls upon penetration of a target area.
Claim 3
Dependent Claim
51 words
A bullet as claimed in claim 1, wherein the rib members are formed to provide flute areas therebetween, said flute areas thereby collecting fluidic materials to concentrate the hydraulic effect and produce uniform expansion of the ogival end after entry into a target of such material whereby to flatten said end.
Claim 4
Dependent Claim
25 words
A bullet as claimed in claim 1, wherein the rib members are triangular and wedge-shaped and extend longitudinally inwardly in said cavity a substantial distance.
Claim 5
Dependent Claim
29 words
A bullet as claimed in claim 3, wherein the rib members are triangularly wedge-shaped in cross-section, and the apices thereof are substantially parallel to the axis of the cavity.
Claim 6
Dependent Claim
42 words
A bullet as claimed in claim 4, wherein the rib members are of triangular wedge-shaped cross-section, and each is of diminishing area beginning at the plane including the greatest area and extending from the cavity opening to the bottom of the cavity.
Claim 7
Dependent Claim
29 words
A bullet as claimed in claim 1, wherein the rib members include apices which follow an inwardly curving path from the cavity opening to positions nearest the axis thereof.
Claim 8
Dependent Claim
39 words
A bullet as claimed in claim 6, wherein the rib members are integral with the body and said members are formed with surfaces curved from their apical edges inwardly into the cavity, said apical edge commencing at the opening.
Claim 9
Dependent Claim
20 words
A bullet as claimed in claim 1, wherein the flute areas diminish in size as they extend into the cavity.
Claim 10
Dependent Claim
23 words
A bullet as claimed in claim 1, wherein the rib members are formed to produce a reaming effect during rotation in a target.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |