Rapid reset fire control
View Patent ↗The present invention is an instrument for the rapid firing of a self-loading firearm in a manner which was not previously possible. Some exemplary embodiments of the present invention comprise a fire control group for firearms essentially conforming to semi-automatic fire control groups as known to the art with the addition of novel features, as described herein, which temporarily transfer hammer spring force to the trigger after the firearm has fired live ammunition, resulting in the urging of the trigger to its reset position by hammer spring force. This temporary use of hammer spring force to urge the trigger to its reset position enables more controllable rapid firing of the firearm and other attributes.
1. A system for facilitating rapid firing of firearms, comprising: a firearm ( 2 ), said firearm comprising:
a hammer body ( 36 ), said hammer body being configured to rotate about a hammer pin ( 13 ), said hammer body comprising a hammer sear ( 19 ), said hammer sear being displaced along a path of travel ( 63 ) as said hammer body rotates about said hammer pin;
a hammer spring ( 17 ) configured to rotationally bias said hammer body towards engagement with a firing pin ( 43 );
a trigger body ( 35 ), said trigger body comprising a trigger sear ( 18 ) and a trigger interface ( 20 ), said trigger body being configured to rotate about a trigger pin ( 12 ); and
a cam member ( 22 ) disposed along said trigger body, said cam member comprising a first surface ( 46 ) and a second surface ( 41 ), said hammer body being engageable with said first surface such that said cam member is displaced with respect to said trigger body, a slidable engagement between said hammer body and said second surface being configured such that bias from said hammer spring causes said trigger body to rotate about said trigger pin such that said trigger sear rotates into said path of travel of said hammer sear as said trigger interface is manipulated by a rearward force ( 47 ) sufficient to cause the discharge of said firearm.
2. A fire control mechanism for increasing the firing rate of a firearm comprising:
a trigger assembly ( 14 ) comprising:
a trigger body ( 35 ) having a trigger interface ( 20 ) and a trigger sear ( 18 ), said trigger body configured to rotate about a trigger pin ( 12 );
a cam member spring ( 23 ), said cam member spring seated against said trigger body;
a cam member ( 22 ) having a first surface ( 46 ) and a second surface ( 41 ), said cam member seated against said cam member spring such that said first surface is biased away from said trigger body; and
a hammer assembly ( 15 ) comprising:
a hammer body ( 36 ) having a hammer surface ( 28 ) and a hammer sear ( 19 ), said hammer body configured to rotate about a hammer pin ( 13 ), said hammer sear being displaced along a path of travel ( 63 ) as said hammer body rotates about said hammer pin;
a hammer spring ( 17 ) configured to rotationally bias said hammer body about said hammer pin toward a firing pin ( 43 ); and
wherein, upon manipulation of said trigger interface by a rearward force ( 47 ) such that said firearm discharges, impetus from the discharge of said firearm causes a bolt carrier surface ( 11 ) to engage said hammer body such that said hammer body is rotated toward said cam member such that said hammer surface comes in contact with said first surface; and
wherein said hammer spring imparts rotational force against said hammer body causing said hammer body to impart a rotation upon said trigger body by a cam engagement between said hammer surface and said second surface; and
wherein the above-recited rotation of said trigger body causes said trigger sear to rotate into said path of travel of said hammer sear as said trigger interface is manipulated by said rearward force sufficient to cause the discharge of said firearm.
3. The fire control mechanism as recited in claim 2 , wherein said cam member is configured such that engagement between said hammer surface and said first surface causes said cam member to be displaced with respect to said trigger body, said hammer surface disengaging from said first surface such that said second surface is displaced into an arcing path of travel of the hammer surface ( 59 ) by the bias of the cam member spring.
4. The fire control mechanism as recited in claim 2 , wherein said cam engagement is configured such that said hammer surface disengages from said second surface after said trigger sear is rotated into said path of travel of said hammer sear.