Penetration enhancing aerodynamically favorable arrowhead II

Abstract

Aerodynamically favorable arrowheads such as pivotal blade arrowheads and/or blade-opening arrowheads that have a sharp cutting edge located upon their arrowhead bodies at a location forward of a corresponding main cutting blade cutting edge when in a penetrating configuration such that the arrowheads maintain favorable aerodynamic flight characteristics and cut target material in front of the main cutting blades when penetrating a target so as to eliminate the frictional drag that the otherwise dull arrowhead bodies would generate with the target before the main cutting blades began cutting target material thereinfront.

I claim:  
     
         1 . An arrowhead comprising: 
 (a) an elongated body having a central longitudinal axis, a forward leading end and an opposing rearward end;    (b) a moveable blade mounted to the body, the moveable blade having a first end disposed closer to the forward end of the elongated body than is an opposing second end of the moveable blade when the arrowhead is in an in-flight configuration;    (c) a second blade fixedly attached to the body adjacent the forward leading end thereof, and    (d) a shaft extending into the body and contacting with the second blade, wherein the first end of the moveable blade is externally exposed from the elongated body when the arrowhead is in the in-flight configuration.    
     
     
         2 . An arrowhead as recited in  claim 1  wherein the first end of the moveable blade rotates in a rearward direction when moving between the in-flight configuration to a penetrating configuration.  
     
     
         3 . An arrowhead as recited in  claim 2  wherein the moveable blade rotates between an angle greater than 90 degrees when moving from the in-flight configuration to the penetrating configuration.  
     
     
         4 . An arrowhead as recited in  claim 1  wherein the first end of the moveable blade is blunted.  
     
     
         5 . An arrowhead as recited in  claim 1  wherein at least a section of the shaft is threaded.  
     
     
         6 . An arrowhead as recited in  claim 1  wherein in the elongated body is a single structural entity.  
     
     
         7 . An arrowhead as recited in  claim 6  wherein the elongated body is fabricated from aluminum.  
     
     
         8 . An arrowhead as recited in  claim 6  wherein the elongated body has a plurality of shafts attached thereto.  
     
     
         9 . An arrowhead as recited in  claim 1  further comprising a first blade slot and a second blade slot, the moveable blade being housed at least in part within the first blade slot and the second blade being housed at least in part within the second blade slot, wherein the rearward most portion of the second blade slot is displaced forward of the forward most section of the first blade slot.  
     
     
         10 . An arrowhead as recited in  claim 9  wherein a line parallel to the central longitudinal axis of the elongated body intersects both blade slots.  
     
     
         11 . An arrowhead as recited in  claim 10  wherein the elongated body is a single structural entity.  
     
     
         12 . An arrowhead as recited in  claim 1  wherein the second blade and the moveable blade each comprise a cutting edge, the arrowhead being configured such that at least a section of the second blade cutting edge extends forward of the moveable blade cutting edge when the arrowhead is in a penetrating configuration, wherein when the arrowhead is in the in-flight configuration the perpendicular distance from the central longitudinal axis to the furthest section of the moveable blade from the central longitudinal axis is longer than the perpendicular distance the furthest section of the second blade cutting edge is displaced from the central longitudinal axis.  
     
     
         13 . An arrowhead comprising: 
 (a) a forward leading end;    (b) a section that abuts against the forward end of an arrrowshaft or an arrowshaft insert when the arrowhead is attached to an arrowshaft;    (c) an elongated body having a central longitudinal axis;    (d) a moveable blade mounted to the body, the moveable blade having a first end disposed closer to the forward leading end of the arrowhead than is an opposing second end of the moveable blade when the arrowhead is in an in-flight configuration, the first end of the moveable blade being externally exposed from the elongated body when the arrowhead is in the in-flight configuration; and    (e) a second blade attached to the body, the second blade having a cutting edge and being configured upon the arrowhead such that at least a section thereof is disposed forward of at least a section of the moveable blade, wherein when the arrowhead is in a penetrating configuration a rearward most end of the cutting edge of the second blade is displaced closer to the forward leading end of the arrowhead than to the section of the arrowhead that abuts against the arrrowshaft or arrowshaft insert when the arrowhead is attached to an arrowshaft.    
     
     
         14 . An arrowhead as recited in  claim 13  wherein the second blade is disposed adjacent a forward leading end of the elongated body.  
     
     
         15 . An arrowhead as recited in  claim 13  wherein when the at least a section of the second blade is disposed forward of at least a section of the moveable blade the arrowhead is in the penetrating configuration.  
     
     
         16 . An arrowhead as recited in  claim 13  wherein when the at least a section of the second blade is disposed forward of at least a section of the moveable blade the arrowhead is in the in-flight configuration.  
     
     
         17 . An arrowhead as recited in  claim 13  wherein the second blade is a non-vented blade.  
     
     
         18 . An arrowhead as recited in  claim 13  wherein the second blade is fixedly attached to the elongated body.  
     
     
         19 . An arrowhead as recited in  claim 18  wherein a shaft is extended at least in part through the elongated body and through an aperture in the second blade.  
     
     
         20 . An arrowhead as recited in  claim 19  wherein the shaft is a set screw.  
     
     
         21 . An arrowhead as recited in  claim 13  wherein the section of the arrowhead that abuts against the arrowshaft is a portion of the elongated body.  
     
     
         22 . An arrowhead as recited in  claim 13  further comprising a first blade slot and a second blade slot, the moveable blade being housed at least in part within the first blade slot and the second blade being housed at least in part within the second blade slot, wherein a line parallel to the central longitudinal axis of the elongated body intersects both blade slots.  
     
     
         23 . An arrowhead as recited in  claim 22  wherein the rearward most portion of the second blade slot is displaced forward of the forward most section of the first blade slot.  
     
     
         24 . An arrowhead as recited in  claim 22  wherein in the elongated body is a single structural entity.  
     
     
         25 . An arrowhead as recited in  claim 13  wherein the second blade and the moveable blade each comprise a cutting edge, the arrowhead being configured such that at least a section of the second blade cutting edge extends forward of the moveable blade cutting edge when the arrowhead is in the penetrating configuration, wherein when the arrowhead is in the in-flight configuration the perpendicular distance from the central longitudinal axis to the furthest section of the moveable blade from the central longitudinal axis is longer than the perpendicular distance the furthest section of the second blade cutting edge is displaced from the central longitudinal axis.  
     
     
         26 . An arrowhead comprising: 
 (a) a forward leading end;    (b) a section that abuts against the forward end of an arrrowshaft or an arrowshaft insert when the arrowhead is attached to an arrowshaft;    (c) an elongated body having a central longitudinal axis;    (d) a moveable blade mounted to the body, the moveable blade having a first end disposed closer to the forward leading end of the arrowhead than is an opposing second end of the moveable blade when the arrowhead is in an in-flight configuration, the first end of the moveable blade being externally exposed from the elongated body when the arrowhead is in the in-flight configuration; and    (e) a second blade attached to the body such that a rearward most externally exposed section thereof is disposed forward of the first end of the moveable blade when the arrowhead is in the in-flight configuration, wherein when the arrowhead is in a penetrating configuration a rearward most end of the cutting edge of the second blade is displaced closer to the forward leading end of the arrowhead than to the section of the arrowhead that abuts against the arrrowshaft or arrowshaft insert when the arrowhead is attached to an arrowshaft.    
     
     
         27 . An arrowhead as recited in  claim 26  wherein the first end of the moveable blade is blunted.  
     
     
         28 . An arrowhead as recited in  claim 26  wherein at least a section of the first end of the moveable blade is convexly curved.  
     
     
         29 . An arrowhead as recited in  claim 26  further comprising a first blade slot and a second blade slot, the moveable blade being housed at least in part within the first blade slot and the second blade being housed at least in part within the second blade slot, wherein a line parallel to the central longitudinal axis of the elongated body intersects both blade slots.  
     
     
         30 . An arrowhead as recited in  claim 29  wherein the rearward most portion of the second blade slot is displaced forward of the forward most section of the first blade slot.  
     
     
         31 . An arrowhead as recited in  claim 29  wherein the elongated body is a single structural entity.  
     
     
         32 . An arrowhead as recited in  claim 26  wherein the second blade is fixedly attached to the elongated body.  
     
     
         33 . An arrowhead as recited in  claim 32  wherein a shaft is extended at least in part through the elongated body and through an aperture in the second blade.  
     
     
         34 . An arrowhead as recited in  claim 26  wherein the second blade and the moveable blade each comprise a cutting edge, the arrowhead being configured such that at least a section of the second blade cutting edge extends forward of the moveable blade cutting edge when the arrowhead is in the penetrating configuration, wherein when the arrowhead is in the in-flight configuration the perpendicular distance from the central longitudinal axis to the furthest section of the moveable blade from the central longitudinal axis is longer than the perpendicular distance the furthest section of the second blade cutting edge is displaced from the central longitudinal axis.