Firearms, sequential firing systems, and methods

Abstract

Firearms, firing systems, and methods may include a receiver, a double-action firing system, and a barrel assembly. The barrel assembly may include a plurality of barrels, and may be moveable relative to the receiver between a firing position and a loading position. The double-action firing system may be configured to fire one of the plurality of barrels with a first pull of a single trigger, and another of the plurality of barrels with a second pull of the single trigger.

1 . A firearm, comprising:
 a receiver;   a barrel assembly comprising a first barrel and a second barrel;   a trigger moveable between an extended position and a retracted position;   a first hammer configured to strike a first firing pin with a first movement of the trigger from the extended position to the retracted position; and   a second hammer configured to strike a second firing pin with a second movement of the trigger from the extended position to the retracted position.   
     
     
         2 . The firearm of  claim 1 , further comprising a handle and a cartridge trap disposed within the handle, the cartridge trap being configured to receive at least one spare ammunition cartridge. 
     
     
         3 . The firearm of  claim 2 , wherein the cartridge trap is accessible through a trap door pivotally secured to the handle. 
     
     
         4 . The firearm of  claim 2 , wherein the cartridge trap is configured to receive a loading clip, the loading clip being configured to releasably secure the spare ammunition cartridge relative to another spare ammunition cartridge. 
     
     
         5 . The firearm of  claim 1 , further comprising a handle and an integral gripping surface disposed in a substrate material of the handle. 
     
     
         6 . The firearm of  claim 1 , further comprising a lanyard loop. 
     
     
         7 . The firearm of  claim 1 , wherein the receiver has a width of 0.0665 inches or less. 
     
     
         8 . The firearm of  claim 1 , wherein the barrel assembly is configured to pivot relative to the receiver between a loading position and a firing position. 
     
     
         9 . The firearm of  claim 8 , wherein the first barrel and the second barrel each include a barrel chamber, the barrel chamber of each of the first barrel and the second barrel being removed from a breech face of the receiver in the loading position and adjacent the breech face in the firing position. 
     
     
         10 . The firearm of  claim 1 , wherein the barrel assembly further comprises a barrel lug having a lug aperture configured to slidably accept a pivot pin disposed in the receiver, wherein the barrel assembly is pivotal about the pivot pin relative to the receiver between a loading position and a firing position. 
     
     
         11 . The firearm of  claim 10 , wherein the pivot pin is retractable from the receiver and the barrel lug for disengaging the barrel assembly from the receiver. 
     
     
         12 . The firearm of  claim 1 , wherein the barrel assembly includes a barrel foot configured to releasably engage a latch assembly positioned in the receiver when the barrel assembly is in a firing position, the barrel foot being disengaged from the latch assembly when the barrel assembly is in a loading position. 
     
     
         13 . The firearm of  claim 1 , wherein the barrel assembly further comprises grasping serrations disposed on opposing sides of the barrel assembly. 
     
     
         14 . The firearm of  claim 1 , wherein the barrel assembly further comprises a barrel hood configured to engage a breech face of the receiver when the barrel assembly is in a firing position, the barrel hood being disengaged from the breech face when the barrel assembly is in a loading position. 
     
     
         15 . The firearm of  claim 1 , further comprising a loaded chamber indicator including a window defined between a breech face of the receiver and a barrel chamber of each of the first barrel and the second barrel when the barrel assembly is in a firing position. 
     
     
         16 . The firearm of  claim 1 , wherein at least one of the first and the second barrel is configured to fire ammunition cartridges selected from the group consisting of: .22 caliber, .22 Magnum, .22 Hornet, 5.7×28 mm, .25 caliber, .380 caliber, 9 mm, 10 mm, .40 Smith & Wesson, .38 Special, .357 Magnum, .410 gauge, .45 Automatic Colt Pistol, .45 Long Colt, .44 Magnum, and .50 Smith & Wesson Magnum. 
     
     
         17 . The firearm of  claim 1 , further comprising a first hammer actuation cam and a second hammer actuation cam, the first hammer actuation cam being rotatable relative to the receiver and having a plurality of first lobes spaced at a first degree of separation, and the second hammer actuation cam being rotatable relative to the receiver and having a plurality of second lobes spaced at a second degree of separation. 
     
     
         18 . The firearm of  claim 17 , wherein the first degree of separation is substantially equidistant between each of the first lobes, and wherein the second degree of separation is substantially equidistant between each of the second lobes. 
     
     
         19 . The firearm of  claim 17 , wherein the second degree of separation substantially corresponds to the first degree of separation. 
     
     
         20 . The firearm of  claim 17 , wherein the second lobes are secured in a fixed position relative to the first lobes at substantially one-half of the first degree of separation. 
     
     
         21 . The firearm of  claim 17 , further comprising a drive cam rotatable relative to the receiver and secured in a fixed position relative to the first hammer actuation cam and the second hammer actuation cam, the drive cam comprising a plurality of teeth disposed about the drive cam, one of the teeth being positioned substantially with zero degrees of separation relative to each of the first lobes and each of the second lobes. 
     
     
         22 . The firearm of  claim 17 , wherein the first hammer comprises a first hammer foot configured to move from a first position engaged with one of the first lobes to a second position disengaged from the first lobe in the first movement of the trigger, and wherein the second hammer comprises a second hammer foot configured to move from a first position engaged with one of the second lobes to a second position disengaged from the second lobe in the second movement of the trigger. 
     
     
         23 . The firearm of  claim 22 , wherein the first hammer has a first free end pivotal about a first secured end, the first free end having a first hammer face configured to strike the first firing pin, wherein the second hammer has a second free end pivotal about a second secured end, the second free end having a second hammer face configured to strike the second firing pin, and wherein the first hammer foot is positioned at the first secured end and the second hammer foot is positioned at the second secured end. 
     
     
         24 . The firearm of  claim 17 , wherein the trigger is configured to rotate each of the first hammer actuation cam and the second hammer actuation cam relative to the receiver when the trigger moves from the extended position to the retracted position. 
     
     
         25 . The firearm of  claim 21 , further comprising a pawl coupled to the trigger and moveable with the trigger from the extended position to the retracted position, wherein pawl is configured to engage the teeth on the drive cam for rotating the first hammer actuation cam and the second hammer actuation cam. 
     
     
         26 . The firearm of  claim 1 , wherein the first firing pin is positioned in a breech face of the receiver and configured to fire the first barrel, and wherein the second firing pin is positioned in the breech face and configured to fire the second barrel. 
     
     
         27 . A firing system, comprising:
 a camshaft;   a first hammer actuation cam rotatable about the camshaft, the first hammer actuation cam comprising a plurality of first lobes spaced at a first degree of separation that is substantially equidistant between each of the first lobes;   a second hammer actuation cam rotatable about the camshaft, the second hammer actuation cam comprising a plurality of second lobes spaced at a second degree of separation that is substantially equidistant between each of the second lobes;   a drive cam rotatable about the camshaft, the drive cam disposed between the first hammer actuation cam and the second hammer actuation cam;   wherein the drive cam is secured in a fixed position relative to the first and the second hammer actuation cam, and wherein the drive cam comprises a plurality of teeth disposed about the drive cam, one of the teeth on the drive cam being positioned substantially with zero degrees of separation relative to each of the first lobes and each of the second lobes;   a first hammer adapted to pivot about a fulcrum, the first hammer comprising a first hammer foot adapted to engage the first lobes; and   a second hammer adapted to pivot about the fulcrum, the second hammer comprising a second hammer foot adapted to engage the second lobes.   
     
     
         28 . The firing system of  claim 27 , wherein the second degree of separation substantially corresponds to the first degree of separation. 
     
     
         29 . The firing system of  claim 27 , wherein the second lobes are secured in a fixed position relative to the first lobes at substantially one-half of the first degree of separation. 
     
     
         30 . The firing system of  claim 27 , wherein the second degree of separation substantially corresponds to the first degree of separation and the second lobes are secured in a fixed position relative to the first lobes at substantially one-half of the first and the second degree of separation. 
     
     
         31 . The firing system of  claim 27 , further comprising:
 a trigger; and   a pawl coupled to the trigger, the pawl adapted to engage the plurality of teeth disposed on the drive cam.   
     
     
         32 . The firing system of  claim 27 , further comprising:
 a trigger; and   a pawl coupled to the trigger, wherein the pawl is configured to engage the drive cam and rotate each of the first and the second hammer actuation cams about the camshaft when the trigger moves from a first position to a second position.   
     
     
         33 . A firearm, comprising:
 a plurality of barrels; and   a double-action firing system comprising a trigger moveable between an extended position and a retracted position, wherein the double-action firing system is configured to fire one of the barrels with a first movement of the trigger from the extended position to the retracted position and another of the barrels with a second movement of the trigger from the extended position to the retracted position.