Firearms – Firing mechanism – Rearward sliding breech bolt
Reexamination Certificate
1999-11-12
2001-08-14
Poon, Peter M. (Department: 3643)
Firearms
Firing mechanism
Rearward sliding breech bolt
C042S069010
Reexamination Certificate
active
06272783
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the invention
The present invention concerns a firing mechanism for fire arms, comprising a casing and a trigger guard, a barrel and a mobile bolt in the casing, whereby the firing mechanism comprises a hammer controlling the striker and which is mounted in a revolving manner in the casing or in the trigger guard between a ‘cocked’ and a ‘tumbled’ position, a spring pushing the hammer in its tumbled position and a revolving tumbler which can retain said hammer in its cocked position, a trigger controlling the tumbler by means of a separator, a bolt stop mounted in a revolving manner in the casing or the trigger guard, whereby said stop stops the backward movement of the bolt in a locked position and makes the bolt go into another position, a control lever which co-operates with said bolt stop which is also mounted in a revolving manner in the casing or in the trigger guard, whereby said control lever can disengage the separator from the tumbler retaining the hammer, such that the separator can no longer control the tumbler.
2. Discussion of the Related Art
Repetition rifles containing a barrel and a mobile bolt or slide, for example with a rotating lock, and which contain firing mechanism of the above-mentioned type are known.
Such a rifle is loaded by moving the bolt from the back to the front, and its repetitive operation is also ensured by moving the mobile bolt from the back to the front and then inversely, whereby said bolt is operated by a loading lever.
When the fire arm is loaded with a cartridge in the fire chamber and the safety device is in the ‘firing’ position, a pressure on the trigger acts on the tumbler by means of the separator, and the hammer is released, thus launching the striker towards the detonator of the chambered cartridge.
When the hammer is pulled down, it acts on the bolt stop which is released from the stop zone of the mobile bolt, so that the bolt can pass. The projectile having left the barrel, the action of the shooter on the loading lever in order to make the bolt and other mobile parts move back, results in the rotation of the breech bolt and subsequently in the extraction and ejection of the case.
The hammer is pulled down again and recocked by the bolt during its recoil movement.
When the mobile bolt is moved forward again by means of the loading lever, a new cartridge which has come out of the magazine is situated on the feeder, and the base of this cartridge will interact with the breech bolt and will be progressively driven towards the fire chamber by this breech bolt.
When the breech bolt is entirely engaged, the mobile bolt is situated in front of the bolt stop which has reassumed its locking position. The fire arm is ready to fire the next shot.
It is possible that, after having loaded the fire arm, the shooter wishes to unload it. In this case, he has to remove the cartridge situated in the fire chamber, which can only be done by revolving the bolt stop out of its locking position, which simultaneously puts the separator in a position in which the tumbler can no longer be controlled.
Certain known firing mechanisms to this end have a small grip fixed to the control lever co-operating with the stop, whereby this grip protrudes outside the casing, next to the trigger guard.
However, this grip is not easy to handle, as one has to hold the fire arm and simultaneously pull the bolt backwards.
SUMMARY OF THE INVENTION
The present invention aims to remedy this disadvantage and to provide a firing device which makes it possible to remove a chambered cartridge in an easy, safe manner while the device is loaded.
This aim is reached according to the invention in that the firing device contains a release lever mounted in a revolving manner in the casing or in the trigger guard and protruding outside the casing and co-operating with one far end with the control lever, whereby, in a first position, this release lever engages said control lever in the position which the latter assumes when the bolt stop is in the locked position, whereby this release lever makes the control lever revolve as it revolves from said first position into a second position, what is called the release position, such that the bolt stop revolves out of its locking position.
Preferably, the release lever co-operates in such a manner that the two above-mentioned positions are stable positions.
The control lever may to this end be provided with two notches, one for each position of the release lever, whereby this lever penetrates with one end in either of the notches in each position.
The bolt stop can be provided with at least one ramp which, in the position in which it is situated when the release lever is situated in the above-mentioned release position, co-operates with the bolt without locking it, such that the movement of the bolt makes the stop and thus the control lever revolve, thus breaking the contact between said control lever and the release lever and making it possible for said release lever to return into its first position.
In this case, a spring may act on the release lever, pushing the release lever into its first position.
Thus, this release lever automatically returns into its first position as soon as it is no longer withheld by the control lever.
REFERENCES:
patent: 1648831 (1927-11-01), Strickler
patent: 2365036 (1944-12-01), Young
patent: 3710495 (1973-01-01), Ziegler et al.
patent: 3797154 (1974-03-01), Seecamp
patent: 4056038 (1977-11-01), Rath
patent: 5417001 (1995-05-01), Rousseau
patent: 5718074 (1998-02-01), Keeney
patent: 1 578 423 (1971-04-01), None
patent: 232645 (1944-09-01), None
patent: 309376 (1969-03-01), None
Dodrimont Claude
Dumortier Thierry
Bacon & Thomas PLLC
Browning International, societe anonyme
Nguyen Son T.
Poon Peter M.
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