US3858481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
For: compensator system for sporting and target rifles
Assignee: Individual
•
Filing: 1973-03-19
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Granted: 1975-01-07
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Expires: 1993-03-19
Abstract
Abstract In a compensator system for sporting and target rifles for eliminating gas blow-by, elminating muzzle jump and reducing recoil, method comprising providing gas chamber means external to the barrel of the firearm, gas sealing the chamber in respect to the outside diameter of the barrel except for inlet and outlet port means for the chamber and during firing of the firearm venting gases escaping from the interior of the barrel into the chamber to produce an axially operative forward force which opposes and reduces the force of recoil of the firearm, the venting of the gases being accomplished prior to the bullet reaching the muzzle of the barrel and while the bullet is still sealing the bore of the barrel, thereby eliminating gas blow-by.
Inventors
- 👤 Otho Harkness Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
355 words
In combination with a rifle having a relatively long barrel with a cartridge chamber at one end and a muzzle at the other end with a rifled bore of constant diameter therebetween, a compensator system for minimizing gas blow-by, muzzle jump, and recoil comprising a cylindrical member extending coaxially with and radially outwardly spaced from said barrel at the muzzle end thereof, a threaded section on the exterior of said barrel, a complimentary internal thread on said cylindrical member for seating and sealing one end of said member to the exterior of said barrel, a circumferential shoulder on said barrel spaced from the threaded section thereon, the other end of said cylindrical member being seated in sealing relation on said shoulder, said cylindrical member in combination with said barrel defining an annular gas expansion chamber, a plurality of gas ports extending radially through said barrel providing a fluid communication path between the bore of said barrel and the interior of said gas expansion chamber, a pair of gas discharge vents at the muzzle end of said cylindrical member extending radially and angularly oppositely upwardly therethrough so as to provide a fluid communication path between the interior of said gas expansion chamber and the atmosphere, said gas ports having a total area at least twice the cross sectional area of the bore of said rifle and being spaced rearwardly from the muzzle of said rifle a distance approximately 2 1/2 inches and substantially less than the spacing between said cartridge chamber and said ports whereby high pressure gases generated upon firing of a cartridge propell a projectile through a relatively long path within said barrel prior to being vented radially outwardly through said gas ports into said gas expansion chamber, said gases moving forwardly through said expansion chamber, thence radially outwardly through said gas discharge vents while the projectile propelled by said gases is still in sealing engagement with the bore of said barrel thereby exerting an axial and radial force on said barrel in opposition to recoil and muzzle jump, respectively, and minimizing blow-by upon exit of the projectile from the muzzle of the rifle.
Claim 2
Dependent Claim
355 words
In combination with a rifle having a relatively long barrel with a cartridge chamber at one end and a muzzle at the other end with a rifled bore of constant diameter therebetween, a compensator system for minimizing gas blow-by, muzzle jump, and recoil comprising a cylindrical member extending coaxially with and radially outwardly spaced from said barrel at the muzzle end thereof, a threaded section on the exterior of said barrel, a complimentary internal thread on said cylindrical member for seating and sealing one end of said member to the exterior of said barrel, a circumferential shoulder on said barrel spaced from the threaded section thereon, the other end of said cylindrical member being seated in sealing relation on said shoulder, said cylindrical member in combination with said barrel defining an annular gas expansion chamber, a plurality of gas ports extending radially through said barrel providing a fluid communication path between the bore of said barrel and the interior of said gas expansion chamber, a pair of gas discharge vents at the muzzle end of said cylindrical member extending radially and angularly oppositely upwardly therethrough so as to provide a fluid communication path between the interior of said gas expansion chamber and the atmosphere, said gas ports having a total area at least twice the cross sectional area of the bore of said rifle and being spaced rearwardly from the muzzle of said rifle a distance approximately 2 1/2 inches and substantially less than the spacing between said cartridge chamber and said ports whereby high pressure gases generated upon firing of a cartridge propell a projectile through a relatively long path within said barrel prior to being vented radially outwardly through said gas ports into said gas expansion chamber, said gases moving forwardly through said expansion chamber, thence radially outwardly through said gas discharge vents while the projectile propelled by said gases is still in sealing engagement with the bore of said barrel thereby exerting an axial and radial force on said barrel in opposition to recoil and muzzle jump, respectively, and minimizing blow-by upon exit of the projectile from the muzzle of the rifle.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |