US3760522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breech mechanism for a hand firearm
Assignee: Heckler und Koch GmbH
•
Filing: 1972-07-31
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Granted: 1973-09-25
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Expires: 1992-07-31
Abstract
Abstract A breech mechanism for a hand firearm such as a pistol which can be converted for use of cartridges of different calibres. The pistol has a striker pin which extends through a cavity in the breech block and through an impact plate closing this cavity forwardly, and which can be displaced selectively into the one or the other of two different positions in which the point of the striker is directed either towards the center or the edge of the bottom of a cartridge located in the cartridge chamber. The striker pin is surrounded with play by a guide member which is displaceable in the adjustment direction relatively to the breech block. Two detent positions are provided for the guide member in which the guide member retains the striker pin either in the one or in the other position.
Inventors
- 👤 M Guhring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:12
CPC Classifications
F; F41; F41A; F41A19/00; F41A19/06; F41A19/13; F41A17/00; F41A17/64
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
A breech mechanism for a hand firearm which can be converted for use of cartridges of different calibres, in particular a pistol having a cartridge chamber, a breech block and a striker pin, said striker pin extending through a cavity in the breech block and through an impact plate closing this cavity forwardly, said striker pin being selectively displaceable into each of two different positions in one of which the point of the striker pin is directed towards the center of the bottom of a cartridge located in the cartridge chamber and in the other of which positions the point of the striker pin is directed towards the edge of the bottom of such cartridge, the striker pin being surrounded with play by a guide member which is displaceable in the adjustment direction relatively to the breech block and wherein two detent positions are provided for the guide member in which the guide member retains the striker pin in said two positions, respectively.
Claim 2
Dependent Claim
163 words
A breech mechanism for a hand firearm which can be converted for use of cartridges of different calibres, in particular a pistol having a cartridge chamber, a breech block and a striker pin, said striker pin extending through a cavity in the breech block and through an impact plate closing this cavity forwardly, said striker pin being selectively displaceable into each of two different positions in one of which the point of the striker pin is directed towards the center of the bottom of a cartridge located in the cartridge chamber and in the other of which positions the point of the striker pin is directed towards the edge of the bottom of such cartridge, the striker pin being surrounded with play by a guide member which is displaceable in the adjustment direction relatively to the breech block and wherein two detent positions are provided for the guide member in which the guide member retains the striker pin in said two positions, respectively.
Claim 3
Dependent Claim
33 words
A breech mechanism according to claim 1, wherein the guide member is pressed resiliently against the Inside of the impact plate and co-operates with detents disposed at the inside of the impact plate.
Claim 4
Dependent Claim
28 words
A breech mechanism according to claim 1, wherein the guide member is loaded directly by a striker pin spring which retains the striker pin in the rest position.
Claim 5
Dependent Claim
122 words
A breech mechanism according to claim 1, wherein the impact plate is provided with two openings for the striker pin point and an abutment of the striker pin rests, in the rest position of the latter, against a safety roll mounted in the breech block, and wherein the safety roll is provided with a recess into which the abutment of the striker pin engages in the safe position of the safety roll, whereby the striker pin recedes so far in its rest position that the striker pin point leaves the respective opening of the impact plate whereas in the firing position of the safety roll the striker pin point engages into the opening corresponding to the desired position of the striker pin.
Claim 6
Dependent Claim
42 words
A breech mechanism according to claim 4, wherein the openings are connected on the inside of the impact plate by a groove into which the striker pin point still engages even when the safety roll has been rotated into the safe position.
Claim 7
Dependent Claim
49 words
A breech mechanism according to claim 1 wherein the guide member is formed by a plate spring the bottom of which engages into each of the respective detent positions, the latter being formed by depressions which are disposed on the inside of the impact plate concentric to the openings.
Claim 8
Dependent Claim
41 words
A breech mechanism according to claim 6 wherein the depressions overlap one another so that they have a common contour which corresponds approximately to the shape of a figure eight and which merge one into the other with a saddle-shaped face.
References Cited (Backward Citations)
US3287843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |