초록 ▼

A firing rate regulating mechanism for an automatic firearm is provided. The firearm, typically, operates according to the closed bolt principle in which a moving bolt carrier carries a bolt that locks each cartridge in the chamber prior to firing. A moving firing pin and a hammer are provided to st

A firing rate regulating mechanism for an automatic firearm is provided. The firearm, typically, operates according to the closed bolt principle in which a moving bolt carrier carries a bolt that locks each cartridge in the chamber prior to firing. A moving firing pin and a hammer are provided to strike the cartridge's primer subsequent to locking of the bolt. A time delay unit is provided and is movable between a compressed position and an expanded position. Movement to the compressed position occurs at a first, relatively rapid rate while movement to the expanded position occurs at a second slower rate. A linkage is provided that compresses the time delay unit as the bolt carrier moves routinely and the hammer is retained against forward movement to strike the firing pin until the time delay unit has moved back into an expanded position. According to one embodiment, the time delay unit can be interconnected with an automatic sear that normally engages the hammer. The time delay unit, and its linkages, are interposed between the automatic sear and the bolt carrier, while the automatic sear is taken out of direct interconnection with the bolt carrier.

대표청구항 ▼

[ What is claimed is:] [1.] An automatic firearm comprising:a receiver;a bolt assembly movably mounted in the receiver and a firing pin movably mounted in the bolt assembly;a hammer movably mounted in the receiver, constructed and arranged to move against the firing pin when the bolt assembly is adj

[ What is claimed is:] [1.] An automatic firearm comprising:a receiver;a bolt assembly movably mounted in the receiver and a firing pin movably mounted in the bolt assembly;a hammer movably mounted in the receiver, constructed and arranged to move against the firing pin when the bolt assembly is adjacent a forwardmost position;a first sear and a second sear each operatively connected to the hammer to release the hammer at predetermined times so that the hammer can move against the firing pin, at least one of the first sear and the second sear being interconnected with a trigger;a time delay unit operatively connected with at least one of the first sear and the second sear wherein movement of the bolt assembly causes the time delay unit to move to a first position in which at least one of the first sear and the second sear retain the hammer remote from the firing pin and wherein the time delay unit is constructed and arranged to move to a second position after a predetermined delay time to operate at least one of the first sear and the second sear to release the hammer so that the hammer moves against the firing pin; anda time delay unit actuator including a cam pivotally mounted on the frame that engages the bolt assembly upon rearward movement of the bolt assembly and a linkage that transfers movement of the cam into movement of the time delay unit.