Double-barrel pump shotguns

Abstract

An improved shotgun design that includes at least two barrels, a trigger assembly that allows for individual simultaneous firing of each barrel, a single magazine with parallel ammunition wells that each feed one barrel, and a single slide mechanism that actuates the loading/unloading mechanism and resets the firing mechanism for discharge of subsequent rounds.

1 . A shotgun, comprising:
 a plurality of barrels;   a plurality of bolts, where
 each one of said bolts is associated with one of said plurality of barrels; and 
 each one of said bolts possesses a firing mechanism; 
   a slide that is operably connected to said plurality of bolts so as to enable cycling of all of said plurality of bolts simultaneously;   a magazine comprising a plurality of ammunition wells, where
 each one of said plurality of ammunition wells is associated with one of said plurality of barrels; and 
 each one of said plurality of ammunition wells is positioned so as to allow feeding of ammunition inserted therein into its associated barrel by the bolt associated with the associated barrel; and 
   a plurality of triggers configured so that
 each one of said triggers is associated with one of said plurality of bolts; and 
 each one of said triggers can be independently actuated so as to release the firing pin of its associated bolt. 
   
     
     
         2 . The shotgun of  claim 1 , further comprising a receiver wherein said receiver houses the plurality of bolts, and into which the plurality of barrels and plurality of magazines are inserted. 
     
     
         3 . The shotgun of  claim 2 , wherein
 each of said barrels possesses a breach end capable of receiving a round of ammunition that is inserted into said receiver;   each of said plurality of bolts possesses a face that contacts the base of said round of ammunition to be chambered, said face having two protrusions disposed on opposite sides of the face so as to align said shell with said breach end of said barrel; and   said receiver further comprises an upper receiver portion and a lower receiver portion, where said upper and lower receiver portions have tapered inner surfaces proximate to the end of said plurality of barrels that is inserted into said receiver.   
     
     
         4 . The shotgun of  claim 1 , wherein said plurality of triggers are physically arranged so that all of said triggers can be actuated simultaneously. 
     
     
         5 . The shotgun of  claim 1 , wherein each of said plurality of triggers is operably connected to its associated bolt through a chain drive. 
     
     
         6 . The shotgun of  claim 1 , wherein said magazine ammunition wells store inserted rounds of ammunition in a stacked configuration. 
     
     
         7 . The shotgun of  claim 6 , wherein said magazine ammunition wells further store inserted rounds of ammunition in a staggered configuration. 
     
     
         8 . The shotgun of claim of  claim 1 , further comprising a grip attached to said slide to facilitate operating said slide. 
     
     
         9 . A shotgun, comprising:
 a shoulder stock;   two barrels, each capable of receiving a round of ammunition;   two bolts, each one of said two bolts paired to one of said two barrels and positioned so as to hold said round of ammunition into the end of said barrel, and possessing a firing mechanism for discharging said round of ammunition;   a magazine capable of holding a plurality of rounds of ammunition;   a foregrip disposed below said two barrels so as to slide axially relative to said barrels;   one or more pushrods connected to said foregrip and said bolts, and positioned so as to move said bolts in response to sliding said foregrip, said movement allowing said bolt to insert and remove said round of ammunition into said barrel; and   a housing wherein
 said shoulder stock is attached; 
 said two bolts are enclosed and positioned so as to facilitate loading and unloading of said plurality of rounds of ammunition into the ends of said two barrels in response to sliding said foregrip; 
 said barrels are inserted so as to allow said two bolts to load and unload said rounds of ammunition into the ends of said two barrels; and 
 said magazine is inserted so as to hold said rounds of ammunition held therein between said two bolts and two barrels in a position that allows said bolts to transfer said rounds of ammunition into the ends of said two barrels. 
   
     
     
         10 . The shotgun of  claim 9 , further comprising a trigger mechanically linked to each of said two bolts so as to cause said firing mechanism in each of said two bolts to discharge said rounds of ammunition simultaneously. 
     
     
         11 . The shotgun of  claim 10 , wherein said mechanical link is comprised of a chain and at least two sprockets. 
     
     
         12 . The shotgun of  claim 9 , further comprising two triggers, each of said two triggers mechanically linked to one each of said two bolts so as to cause said firing mechanism in said linked bolt to discharge its associated round of ammunition. 
     
     
         13 . The shotgun of  claim 12 , wherein said two triggers are arranged so as to facilitate actuating both triggers simultaneously. 
     
     
         14 . The shotgun of  claim 13 , wherein said mechanical linkages are comprised of a plurality of chains and sprockets. 
     
     
         15 . The shotgun of  claim 9 , wherein
 each of said two bolts possesses an extractor positioned opposite to said pushrod, said extractor and pushrod arranged so as to center a round of ammunition to be loaded into the barrel associated with said bolt along the center axis of said barrel; and   said housing further comprises an upper receiver and a lower receiver, with each of said upper receiver and lower receiver having a tapered inner surface proximate to the end of said barrels that are inserted into said housing, said tapered inner surfaces positioned so as to guide a round of ammunition to be loaded into either of said barrels along the center axis of said barrel.   
     
     
         16 . The shotgun of  claim 9 , wherein said magazine possesses a partition that divides said magazine into two ammunition wells, with each of said ammunition wells associated with one of said two barrels. 
     
     
         17 . The shotgun of  claim 16 , wherein each of said ammunition wells holds said rounds of ammunition in a stacked configuration. 
     
     
         18 . The shotgun of  claim 17 , wherein each of said ammunition wells holds said rounds of ammunition in a staggered stacked configuration. 
     
     
         19 . The shotgun of  claim 9 , further comprising a trigger mechanically linked to each of said two bolts so as to cause said firing mechanism in each of said two bolts to discharge said rounds of ammunition sequentially, with one round discharged for each actuation of said trigger. 
     
     
         20 . A shotgun, comprising:
 an adjustable shoulder stock;   two barrels, each capable of receiving a round of ammunition;   two bolts, each one of said two bolts paired to one of said two barrels and positioned so as to hold said round of ammunition into the end of said barrel, possessing a firing mechanism for discharging said round of ammunition, and two oppositely disposed protrusions arranged so as to align said round of ammunition with the center axis of said barrel;   a magazine with two independent wells, each associated with one of the said two barrels and capable of holding a plurality of rounds of ammunition;   a foregrip disposed below said two barrels so as to slide axially relative to said barrels;   one or more pushrods connected to said foregrip and said bolts, and positioned so as to move said bolts in response to sliding said foregrip, said movement allowing said bolt to insert and remove said round of ammunition into said barrel; and   a housing comprised of an upper and lower receiver, wherein
 said shoulder stock is attached; 
 said two bolts are enclosed and positioned so as to facilitate loading and unloading of said plurality of rounds of ammunition into the ends of said two barrels in response to sliding said foregrip; 
 said barrels are inserted so as to allow said two bolts to load and unload said rounds of ammunition into the ends of said two barrels; 
 said upper and lower receiver have inner surfaces that are tapered towards the portion of said two barrels that is inserted into said housing so as to align a round of ammunition inserted into either of said two barrels with the center axis of said barrel; and 
 said magazine is inserted so as to hold said rounds of ammunition held therein between said two bolts and two barrels in a position that allows said bolts to transfer said rounds of ammunition into the ends of said two barrels; and 
   two latch levers disposed to enable disassembly of the shotgun.