Patent US4603498A successfully refreshed from Google Patents.
US4603498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Externally visible safety device for grenade launcher
Assignee: Individual
•
Filing: 1985-10-04
•
Granted: 1986-08-05
•
Expires: 2005-10-04
Abstract
Abstract A safety device for firearms, including a chamber plug portion fitting in the breech and preventing insertion of a cartridge, and an indicator located externally of the weapon and fixedly joined with the chamber plug by a connector small enough to fit within a pre-existing passageway extending between the interior of the firing chamber and the exterior of the weapon when the breech of the weapon is closed as if in readiness for firing. Preferably, the indicator is of a bright color and is located so as to be visible on both sides of the weapon.
Inventors
- 👤 David A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:33
CPC Classifications
F; F41; F41A; F41A17/00; F41A17/44; F41C; F41C27/00; F41C27/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
194 words
An externally visible safety device for a breech loading firearm having structure defining a firing chamber for receiving a cartridge to be fired and a breech-closing member for selectively closing a breech opening of said firing chamber, said structure defining a firing chamber and said breech-closing member cooperatively defining a passageway communicating in a radial direction between the interior of said firing chamber and the exterior of said firearm when said breech is closed by said breechclosing member, the safety device comprising: (a) a chamber plug of a size which fits within said firing chamber in a position adjacent the breech thereof, preventing placement of a cartridge into said firing chamber; (b) an indicator which is located in a position visibly exposed externally of said firearm when said chamber plug is located within said firing chamber; and (c) connector means extending between said chamber plug and said indicator, for connecting said chamber plug with said indicator, said connector means being of a size and shape which fits within said passageway, and said connector means being small enough not to interfere with the closing of the breech of said firing chamber by said breech-closing member.
Claim 2
Dependent Claim
194 words
An externally visible safety device for a breech loading firearm having structure defining a firing chamber for receiving a cartridge to be fired and a breech-closing member for selectively closing a breech opening of said firing chamber, said structure defining a firing chamber and said breech-closing member cooperatively defining a passageway communicating in a radial direction between the interior of said firing chamber and the exterior of said firearm when said breech is closed by said breechclosing member, the safety device comprising: (a) a chamber plug of a size which fits within said firing chamber in a position adjacent the breech thereof, preventing placement of a cartridge into said firing chamber; (b) an indicator which is located in a position visibly exposed externally of said firearm when said chamber plug is located within said firing chamber; and (c) connector means extending between said chamber plug and said indicator, for connecting said chamber plug with said indicator, said connector means being of a size and shape which fits within said passageway, and said connector means being small enough not to interfere with the closing of the breech of said firing chamber by said breech-closing member.
Claim 3
Dependent Claim
74 words
The safety device of claim 1 wherein said firearm includes an extractor associated with said breech-closing member and said passageway includes an extractor recess, said connector means being of a size and shape which fits within said extractor recess, with said connector means extending generally radially therethrough between said firing chamber plug and said indicator when said safety device is located in said firing chamber with said breech thereof closed by said breech-closing member.
Claim 4
Dependent Claim
40 words
The safety device of claim 2, said connector means defining an extractor aperture extending thereinto, said aperture being large enough to receive said extractor when said breech-closing member is in a position closing said breech opening of said firing chamber.
Claim 5
Dependent Claim
28 words
The safety device of claim 3 wherein said extractor aperture in said connector means extends generally longitudinally of said firearm when said safety device is operatively located therein.
Claim 6
Dependent Claim
45 words
The safety device of claim 1 wherein said passageway includes a circumferential gap extending generally radially between said structure defining a firing chamber and said breech-closing member, and wherein said connector means includes a radiallyextending web disposed about a predetermined segment of said chamber plug.
Claim 7
Dependent Claim
51 words
The safety device of claim 1 wherein said firearm includes a receiver having respective left and right sides and wherein said indicator extends rearwardly of said chamber plug and is disposed exteriorly adjacent at least a part of each of said left and right sides of the receiver of said firearm.
Claim 8
Dependent Claim
31 words
The safety device of claim 1 wherein said indicator is substantially semicircular in shape and includes respective left and right side portions each extending adjacent a respective side of said firearm.
Claim 9
Dependent Claim
14 words
The safety device of claim 1 wherein said indicator is of a bright color.
Claim 10
Dependent Claim
16 words
The safety device of claim 1 wherein said safety device is of monolithic molded plastic construction.
Claim 11
Dependent Claim
18 words
The safety device of claim 1 wherein said connector means extends generally radially ralative to said firing chamber.
Claim 12
Dependent Claim
20 words
The safety device of claim 1 wherein said connector means is fixedly attached to said chamber plug and said indicator.
Claim 13
Dependent Claim
46 words
The safety device of claim 1 wherein said firearm has a left side and a right side, said indicator including structure located so as to be conspicuously visible on both of said left and right sides of a firearm in which the safety device is installed.
Claim 14
Dependent Claim
171 words
In combination with a breech loading firearm including structure defining a firing chamber for receiving a cartridge to be fired, said firing chamber defining a breech opening, and said firearm further including a breech block for selectively closing said breech opening and structure defining a passageway communicating in a radial direction between the interior of said firing chamber and the exterior of said firearm when said breech is closed by said breech block, an externally visible safety device, comprising: (a) chamber plug means of a size which fits within said firing chamber, for preventing entry of a cartridge into said firing chamber; (b) an indicator located in a position visibly exposed externally of said firearm; and (c) connector means extending between said chamber plug and said indicator, for connecting said chamber plug with said indicator, said connector means being of a size and shape which fits within said passageway, and being small enough not to interfere with the closing of the breech of said firing chamber structure by said breech block.
Claim 15
Dependent Claim
171 words
In combination with a breech loading firearm including structure defining a firing chamber for receiving a cartridge to be fired, said firing chamber defining a breech opening, and said firearm further including a breech block for selectively closing said breech opening and structure defining a passageway communicating in a radial direction between the interior of said firing chamber and the exterior of said firearm when said breech is closed by said breech block, an externally visible safety device, comprising: (a) chamber plug means of a size which fits within said firing chamber, for preventing entry of a cartridge into said firing chamber; (b) an indicator located in a position visibly exposed externally of said firearm; and (c) connector means extending between said chamber plug and said indicator, for connecting said chamber plug with said indicator, said connector means being of a size and shape which fits within said passageway, and being small enough not to interfere with the closing of the breech of said firing chamber structure by said breech block.
Claim 16
Dependent Claim
21 words
The safety device of claim 13 wherein said firearm is a grenade launcher and said passageway includes an extractor clearance recess.
References Cited (Backward Citations)
US2997802A
Cited
US3089272A
Cited
US3605311A
Cited
US4058923A
Cited
US4136476A
Cited
US4384420A
Cited
US4528765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |