US 4,722,148 AGranted

Firearm

AssigneeAserma Manufacturing a division of O.M.C. Aserma (Proprietary) Limited

InventorHylton R. Walker

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Abstract

A firearm has a plurality of parallel barrels arranged uniformly circumfetially about a center axis. A hammer is translational from a cocked position to a fire position along said center axis. It has a firing pin offset from the center axis in correspondence to the spacing of the barrels from the center axis. The hammer is pivotal about said center axis during cocking to advance the firing pin from an aligned position in respect of one barrel to an aligned position in respect of a succeeding barrel. The firearm comprises a trigger guided for translation rearwardly from a rest position. A sear, connected to the trigger via a ramp formation, is arranged, on depression of the trigger, to engage the hammer to cock it. Progressive depression of the trigger progressively displaces the sear via the ramp formation to a release position in which the hammer is released to translate from its cocked position to its fire position under resilient bias.

Claims9

Dependent claims

A firearm including a plurality of barrels circumferentially spaced about a centre axis, the axes of the barrels being substantially parallel to one another and to said centre axis, and a firing mechanism having

a trigger;
a hammer mounted for translation in forward/rearward directions between a cocked position and a fire position and for pivoting about a hammer pivot axis co-axial with said centre axis, and which is resiliently biassed to its fire position;
a striking formation fast with the hammer and transversely spaced from the hammer pivot axis in correspondence with the spacing of the barrels from the centre axis;
pivot means adapted to pivot the hammer about said hammer pivot axis between shots to advance the striking formation from one barrel to another;
and
means for cocking and releasing the hammer which means is operatively connected to the trigger and which includes a sear located for displacement between an engaging position in which it engages the hammer and a release position in which it releases the hammer from its cocked position, and a ramp member having a ramp which is arranged, on depression of the trigger beyond a predetermined limit, to cause displacement of the sear to its release position.

3 more elements

Dependencies are inferred from the claim text.