Patent US3848510A successfully refreshed from Google Patents.
US3848510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolt locking mechanism for reciprocating gun
Assignee: United States Department of the Navy
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Filing: 1973-08-27
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Granted: 1974-11-19
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Expires: 1993-08-27
Abstract
Abstract A bolt locking mechanism for an automatic weapon having a bolt housing and an accelerator slidably mounted therein. A firing pin is attached to the accelerator and the bolt housing has a pair of linear grooves extending outwardly to the sides of the bolt. A roller lock is provided in each linear groove and these roller locks are engageable with cams which lock the accelerator with the bolt during a portion of the bolt travel. A barrel extension has a pair of locking grooves which are engageable by the roller locks to lock the bolt housing with the barrel extension during firing of the automatic weapon.
Inventors
- 👤 J Wolpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:10
CPC Classifications
F; F41; F41A; F41A3/00; F41A3/12; F41A3/36; F41A3/44; F41A3/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
244 words
In an automatic firearm, a bolt locking mechanism comprising, a breech housing, a barrel extension connected to said breech housing having means for attaching a barrel on one end thereof and having locking grooves therein, a bolt slidably mounted in said breech housing, said bolt having opposed linear slots with parallel surfaces in each side thereof, an accelerator slidably mounted in said bolt, said accelerator having a firing pin attached thereto, first and second roller lock assemblies each said roller lock assembly having a shaft with at lesst one pair of flat parallel surfaces on each end thereof and a roller positioned midway between said shafts ends with said flat parallel surfaces extending outwardly from each side of said roller, said parallel surfaces on each end of said shaft being slidably engageable with the parallel surfaces of said linear slots in said bolt and each said roller being engageable with said accelerator, said roller lock assemblies releasably locking said accelerator with said bolt, and cam means attached to said breech housing engageable with said roller lock assemblies for locking said accelerator with said bolt until a round carried by said bolt reaches a battery position and said roller lock assemblies unlock said accelerator from said bolt and lock said bolt to said barrel extension and upon recoil of said bolt said cam means actuates said roller lock assemblies to unlock said bolt from said barrel extension and to lock said accelerator with said bolt.
Claim 2
Dependent Claim
244 words
In an automatic firearm, a bolt locking mechanism comprising, a breech housing, a barrel extension connected to said breech housing having means for attaching a barrel on one end thereof and having locking grooves therein, a bolt slidably mounted in said breech housing, said bolt having opposed linear slots with parallel surfaces in each side thereof, an accelerator slidably mounted in said bolt, said accelerator having a firing pin attached thereto, first and second roller lock assemblies each said roller lock assembly having a shaft with at lesst one pair of flat parallel surfaces on each end thereof and a roller positioned midway between said shafts ends with said flat parallel surfaces extending outwardly from each side of said roller, said parallel surfaces on each end of said shaft being slidably engageable with the parallel surfaces of said linear slots in said bolt and each said roller being engageable with said accelerator, said roller lock assemblies releasably locking said accelerator with said bolt, and cam means attached to said breech housing engageable with said roller lock assemblies for locking said accelerator with said bolt until a round carried by said bolt reaches a battery position and said roller lock assemblies unlock said accelerator from said bolt and lock said bolt to said barrel extension and upon recoil of said bolt said cam means actuates said roller lock assemblies to unlock said bolt from said barrel extension and to lock said accelerator with said bolt.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |