Patent US3744370A successfully refreshed from Google Patents.
US3744370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blank firing attachment
Assignee: United States Department of the Army
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Filing: 1970-03-02
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Granted: 1973-07-10
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Expires: 1990-03-02
Abstract
Abstract An improved blank firing attachment is provided for automatic weapons comprising a frame with a rod-like restrictor adjustably mounted on the frame. The frame utilizes slotted means for engaging cooperating slots or shoulders associated with the muzzle end of the barrel. The restrictor is adjusted to bear against the end of the barrel to close the bore. An axial bore in the restrictor of smaller diameter than the barrel bore offers interference to a projectile inadvertently fired minimizing danger to personnel in the area. The restrictor bore is vented to gradually reduce gas pressures therein and in the barrel bore.
Inventors
- 👤 R Snodgrass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:07
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
A blank firing attachment for a rifle barrel comprising a rectangular frame, a rod adjustably mounted on one end of said frame for movement toward and away from an opposite end of said frame, one end of said rod being at least coextensive with said barrel bore diameter and being freely disposed within said frame, said one end having an axial bore terminating inwardly thereof from said one end, said frame being disposed substantially symmetrical about the axis of said rod, said frame opposite end being provided with slotted means for engaging cooperating means associated with the muzzle end of said barrel, whereby said rod one end is adapted for abutment with the end of said barrel in a manner to close the bore thereof.
Claim 2
Dependent Claim
125 words
A blank firing attachment for a rifle barrel comprising a rectangular frame, a rod adjustably mounted on one end of said frame for movement toward and away from an opposite end of said frame, one end of said rod being at least coextensive with said barrel bore diameter and being freely disposed within said frame, said one end having an axial bore terminating inwardly thereof from said one end, said frame being disposed substantially symmetrical about the axis of said rod, said frame opposite end being provided with slotted means for engaging cooperating means associated with the muzzle end of said barrel, whereby said rod one end is adapted for abutment with the end of said barrel in a manner to close the bore thereof.
Claim 3
Dependent Claim
31 words
The invention as defined in claim 1 and wherein said rod is provided with vent means disposed radially outwardly from sAid axial bore for communicating said axial bore with the ambience;
Claim 4
Dependent Claim
41 words
The invention as defined in claim 2 wherein the sides of said frame are pivotally attached to said one end for movement toward and away from each other, and said opposite end is bifurcated symmetrically with respect to said slotted means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |