US4583445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash reducing muzzle brake
Assignee: Individual
•
Filing: 1983-12-20
•
Granted: 1986-04-22
•
Expires: 2003-12-20
Abstract
Abstract A muzzle brake for reducing swing, climb and recoil of a rifle is improved with a plurality of spaced ports intersecting the exit throat of the brake and venting gasses which would otherwise form an undesirable boundary layer effect. The effect of the ports is to prevent formation of the restricting boundary layer in the throat and to reduce the acceleration of gasses in the throat, thus reducing the flash effect of hot incandescent exit gasses.
Inventors
- 👤 Steven M. Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:40
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/32; F41A21/36; F41A21/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A combination muzzle brake and flash hider for installation on the muzzle of a firearm barrel comprising: a cylindrically shaped body attachable to the muzzle in line with the axis of the barrel; said body having an axial bore of variable radius which defines: a mating section shaped and dimensioned for attachment to the muzzle; following said section, an expansion chamber having an inner cross-diameter greater than the inner cross-diameter of the barrel; following said chamber an exit throat having an inner cross-diameter commensurate with the inner cross-diameter of the barrel; said throat expanding into a dispersion cone leading to the forward face of the cylindrically shaped body; and the wall of said cone having a plurality of passageways drilled into said forward face around the periphery of said cone in an rearwardly angular direction to intersect the cone at an angle relative to the axis of the barrel of between 20 and 80 degrees.
Claim 2
Dependent Claim
155 words
A combination muzzle brake and flash hider for installation on the muzzle of a firearm barrel comprising: a cylindrically shaped body attachable to the muzzle in line with the axis of the barrel; said body having an axial bore of variable radius which defines: a mating section shaped and dimensioned for attachment to the muzzle; following said section, an expansion chamber having an inner cross-diameter greater than the inner cross-diameter of the barrel; following said chamber an exit throat having an inner cross-diameter commensurate with the inner cross-diameter of the barrel; said throat expanding into a dispersion cone leading to the forward face of the cylindrically shaped body; and the wall of said cone having a plurality of passageways drilled into said forward face around the periphery of said cone in an rearwardly angular direction to intersect the cone at an angle relative to the axis of the barrel of between 20 and 80 degrees.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein the plurality of passageways number 4.
Claim 4
Dependent Claim
15 words
The device of claim 1 wherein the dispersion cone is a truncated true conical shape.
Claim 5
Dependent Claim
15 words
The device of claim 1 wherein the dispersion cone is a truncated parabolic conical shape.
References Cited (Backward Citations)
US1538243A
Cited
US1636357A
Cited
US2101849A
Cited
FR911049A
Cited
US3710683A
Cited
US4307652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |