Patent US3874294A successfully refreshed from Google Patents.
US3874294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic cartridge case for high pressure center fire ammunition having multi-component stamped metal head
Assignee: Remington Arms Co LLC
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Filing: 1973-01-02
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Granted: 1975-04-01
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Expires: 1993-01-02
Abstract
Abstract A center fire cartridge case for high pressure cartridges has a plastic body and a metallic head. The head is assembled solely from inexpensive, easily manufactured components which positively interlock to maintain the structural integrity of the cartridge case. Interaction of head components forms an extractor groove without the need for a turning operation.
Inventors
- 👤 H Jackson Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:18
CPC Classifications
F; F42; F42B; F42B33/00; F42B33/001; F42B5/00; F42B5/26; F42B5/30; F42B5/307
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
A cartridge case for a high-powered center fire cartridge comprising a plastic casing with a rearward end, a transverse wall defining a flash hole, and a rearwardly extending skirt, a metallic tubular reinforcing sleeve positioned around the skirt, a metallic extraction rim having a central opening and positioned against the rearward end of the casing for holding the reinforcing sleeve against Removal from the casing, and a metallic cup member having an outwardly directed peripheral flange at a rear end portion and a tubular extension at a forward end portion and being positioned within the skirt and the central opening of the extraction rim with the tubular extension extending through the flash hole and the peripheral flange holding the extraction rim against removal, the tubular extension being outwardly flared to abut the transverse wall in interlocking relationship.
Claim 2
Dependent Claim
137 words
A cartridge case for a high-powered center fire cartridge comprising a plastic casing with a rearward end, a transverse wall defining a flash hole, and a rearwardly extending skirt, a metallic tubular reinforcing sleeve positioned around the skirt, a metallic extraction rim having a central opening and positioned against the rearward end of the casing for holding the reinforcing sleeve against Removal from the casing, and a metallic cup member having an outwardly directed peripheral flange at a rear end portion and a tubular extension at a forward end portion and being positioned within the skirt and the central opening of the extraction rim with the tubular extension extending through the flash hole and the peripheral flange holding the extraction rim against removal, the tubular extension being outwardly flared to abut the transverse wall in interlocking relationship.
Claim 3
Dependent Claim
36 words
A cartridge case as in claim 1 wherein said reinforcing sleeve has a rear end portion of reduced diameter and the rear end portion and said extraction rim form an extractor groove for the cartridge case.
Claim 4
Dependent Claim
15 words
A cartridge case as in claim 2 wherein said reinforcing sleeve is a steel stamping.
Claim 5
Dependent Claim
28 words
A cartridge case as in claim 1 wherein said extraction rim has a peripheral groove around said central opening for containing the peripheral flange of said cup member.
Claim 6
Dependent Claim
27 words
A cartridge case as in claim 1 wherein said reinforcing sleeve has a rear surface and said extraction rim abuts said rear surface in lateral engaging relationship.
Claim 7
Dependent Claim
120 words
A cartridge case for a high-powered center fire cartridge comprising a plastic casing with a rearward end, a transverse wall defining a flash hole, and a rearwardly extending skirt, a metallic tubular reinforcing sleeve positioned around the skirt, and a metallic cup member having an outwardly directed peripheral flange at a rear end portion and a tubular extension at a forward end portion, a portion of the flange being folded over to form an extraction rim, said cup member being positioned within the skirt with the tubular extension extending through the flash hole and the extraction rim holding the reinforcing sleeve against removal from the casing, the tubular extension being outwardly flared to abut the transverse wall in interlocking relationship.
Claim 8
Dependent Claim
120 words
A cartridge case for a high-powered center fire cartridge comprising a plastic casing with a rearward end, a transverse wall defining a flash hole, and a rearwardly extending skirt, a metallic tubular reinforcing sleeve positioned around the skirt, and a metallic cup member having an outwardly directed peripheral flange at a rear end portion and a tubular extension at a forward end portion, a portion of the flange being folded over to form an extraction rim, said cup member being positioned within the skirt with the tubular extension extending through the flash hole and the extraction rim holding the reinforcing sleeve against removal from the casing, the tubular extension being outwardly flared to abut the transverse wall in interlocking relationship.
Claim 9
Independent Claim
108 words
A method of manufacturing a cartride case having a plastic body with a transverse wall and rearwardly extending skirt formed therein, the method comprising the steps of positioning a reinforcing sleeve around the skirt, positioning an extraction rim having a central opening rearwardly of the skirt and reinforcing sleeve, moving a flanged cup member through the central opening of the extraction rim to a position within the skirt so that its flanged portion abuts the extraction rim and a tubular extension protrudes through a flash hole in the transverse wall, and outwardly flaring the tubular extension thereby positively interlocking the rim, sleeve and cup to the plastic body.
Claim 10
Independent Claim
108 words
A method of manufacturing a cartride case having a plastic body with a transverse wall and rearwardly extending skirt formed therein, the method comprising the steps of positioning a reinforcing sleeve around the skirt, positioning an extraction rim having a central opening rearwardly of the skirt and reinforcing sleeve, moving a flanged cup member through the central opening of the extraction rim to a position within the skirt so that its flanged portion abuts the extraction rim and a tubular extension protrudes through a flash hole in the transverse wall, and outwardly flaring the tubular extension thereby positively interlocking the rim, sleeve and cup to the plastic body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |