US3680240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inertia actuated cartridge retaining latches
Assignee: United States Department of the Army
•
Filing: 1970-12-18
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Granted: 1972-08-01
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Expires: 1990-12-18
Abstract
Abstract A firearm includes inertial cartridge retaining latches which are actuated to release the fired cartridge case from the launcher responsive to cartridge discharge forces.
Inventors
- 👤 Irwin R Barr
- 👤 Jack H Hayman Jr
- 👤 Harold A Wilkening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:53
CPC Classifications
F; F41; F41A; F41A15/00; F41A15/12; F41A15/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
In a firearm for firing an ammunition round comprising a case with an annular extractor groove, the improvement wherein said firearm includes at least one latch releasably engageable with said extractor groove for securing said round to said firearm for discharge, said latch including an inertial block disposed to oppose the recoil forces generated by discharge of said round and thereby actuate said latch from engagement with said extractor groove.
Claim 2
Dependent Claim
70 words
In a firearm for firing an ammunition round comprising a case with an annular extractor groove, the improvement wherein said firearm includes at least one latch releasably engageable with said extractor groove for securing said round to said firearm for discharge, said latch including an inertial block disposed to oppose the recoil forces generated by discharge of said round and thereby actuate said latch from engagement with said extractor groove.
Claim 3
Dependent Claim
52 words
The invention as defined in claim 1 wherein said latch is disposed for pivotal displacement between an engaging and a disengaged position relative to said extractor groove by means of a pin disposed normal to the direction of the recoil forces and through said latch intermediate the front and rear ends thereof.
Claim 4
Dependent Claim
53 words
The invention as defined in claim 2 wherein said latch includes a hook located on the front end thereof for engagement with said extractor groove when said latch is in the engaging positiOn, and wherein the center of mass of said inertial block is located inwardly and to the rear of said pin.
Claim 5
Dependent Claim
41 words
The invention as defined in claim 3 wherein said firearm includes a pair of said latches pivotally mounted diametrically apart thereto, and including means interlocking said pair of latches to assure simultaneous displacement between the engaging and the disengaged positions thereof.
Claim 6
Dependent Claim
47 words
The invention as defined in claim 4 wherein said interlocking means comprise a tongue extending from said inertial block of one of said pair of latches, and a slot disposed in said inertial block of the other one of said pair of latches for receiving said tongue.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |