Patent US3603020A successfully refreshed from Google Patents.
US3603020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magazine assembly with expendable cartridge container unit
Assignee: United States Department of the Army
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Filing: 1970-03-27
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Granted: 1971-09-07
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Expires: 1990-03-27
Abstract
Abstract A replacement cartridge magazine for a firearm comprises an adapter unit having a configuration similar to that of the upper portion of the standard magazine therefor, and a cartridge container with a spring-biased follower, which holds the cartridge requirements of the magazine assembly. The adapter preferably fabricated from metal, is releasably latched to the firearm so as to be normally a part thereof and the container, inexpensively manufactured from plastic so as to be expendable, is releasably latched to the adapter. A tape extends over the top of the container to secure the cartridges therein when loaded and so as to be sheared by the firearm bolt during passage over the magazine assembly. A protective cover is also provided for installation over the top, open portion of the container and is sealed by adhesive tape thereto.
Inventors
- 👤 Harold H Wiese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:25
CPC Classifications
F; F41; F41A; F41A9/00; F41A9/61; F41A9/64; F41A9/65; F41A9/69
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
In cooperation with a firearm comprising a receiver with a magazine port and a bolt disposed for reciprocal travel in the receiver, a magazine assembly comprising an adapter unit receivable by the magazine port, means for releasably latching said adapter unit in the magazine port, and a cartridge container comprising a base portion of deep concave configuration, a portion extending integrally from said base portion and adapted for insertion into said adapter unit, means for releasably securing said container to said adapter unit, a spring-biased follower for biasing cartridges in said container to a free open end thereof and means acted upon by the bolt during reciprocation thereof for releasably securing the cartridges in said container.
Claim 2
Dependent Claim
116 words
In cooperation with a firearm comprising a receiver with a magazine port and a bolt disposed for reciprocal travel in the receiver, a magazine assembly comprising an adapter unit receivable by the magazine port, means for releasably latching said adapter unit in the magazine port, and a cartridge container comprising a base portion of deep concave configuration, a portion extending integrally from said base portion and adapted for insertion into said adapter unit, means for releasably securing said container to said adapter unit, a spring-biased follower for biasing cartridges in said container to a free open end thereof and means acted upon by the bolt during reciprocation thereof for releasably securing the cartridges in said container.
Claim 3
Dependent Claim
62 words
The invention as defined in claim 1 wherein said adapter is fabricated from metal and includes lip means disposed for cooperation with said spring-biased follower for successively locating the cartridges in said assembly in a position for removal by the bolt during reciprocation thereof, and wherein said container is inexpensively fabricated from plastic as by molding means so as to be expendable.
Claim 4
Dependent Claim
109 words
The invention as defined in claim 1 wherein said means for releasably securing said container to said adapter unit comprises a boss of rectangular configuration protruding from one side of said container, an aperture formed in said adapter unit and located to receive said boss when said container is correctly located therein, and a top cam surface of said boss contactable with the bottom edge of said adapter unit to facilitate insertion of said container into said adapter unit and permit entry of said boss thereinto for reception by said aperture, said boss being responsive to inward pressure applied to said one side of said container for removal therefrom.
Claim 5
Dependent Claim
41 words
The invention as defined in claim 1 and including a cover of box configuration fitting over said extension portion to protect the cartridges in said container, and sealing means applied to said container and to the bottom edge of said cover.
Claim 6
Dependent Claim
46 words
The invention as defined in claim 1 and including an integral rib formed vertically along the inner wall of each side of said container for engagement by extractor grooves of cartridges disposed therein to prevent longitudinal displacement thereof in said container while permitting vertical displacement therealong.
Claim 7
Dependent Claim
45 words
The invention as defined in claim 1 and including supplemental fastening means disposed on said adapter for cooperation with lip means around the bottom edge of said magazine port thereby to assist said first named means in releasably securing said adapter in said magazine port.
Claim 8
Dependent Claim
40 words
The invention as defined in claim 1 wherein said means acted upon by the bolt comprises a tape of easily ruptured plastic material extending over said open end and sealed at both ends to the opposite sides of said container.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |