T - lock broadhead and tight point matched balance point archery point system

Abstract

Provided is a broadhead for an arrow having a shaft with a shaft bore. The broadhead comprises a ferrule and a plurality of blade members. The ferrule has a mating end and a tip end with a plurality of convex ridges being equiangularly spaced around the ferrule such that the ferrule has a tri-oval cross section. Each one of the ridges has a blade groove formed therein for receiving one of the blade members. The blade members each have a base portion that is shaped complementary to the blade groove so that the blade member may be axially insertable into the blade groove. The broadhead includes a shank extending outwardly from the mating end and which is threadably engagable into the shaft bore. An O-ring mounted on the shank is captured between the shank and the shaft bore when the broadhead is secured to the arrow at the mating end.

1 - 35 . (canceled)  
   
   
       36 . A method of manufacturing a broadhead for an arrow, the broadhead comprising an elongate ferrule and at least on blade member insertable thereinto, the ferrule having a mating end and a tip end with a longitudinal axis extending therebetween and having at least one axially aligned elongate blade groove of generally T-shaped cross section extending radially inwardly, the blade member having a base portion that is shaped complementary to the blade groove and being configured to be axially insertable thereinto along a direction from the mating end toward the tip end, the method comprising the steps of: 
 providing at least one of a ferrule mold and a blade member mold each having a mold cavity collectively defining the broadhead;    injecting metallic granules under pressure into at least one of the ferrule and blade member molds to form a greenware part;    debinding the greenware part using a catalytic debinder; and    sintering the greenware part under ambient pressure in a sintering furnace.    
   
   
       37 . The method of  claim 36  wherein the granules are polyacetal-based granules.  
   
   
       38 . The method of  claim 36  wherein the catalytic debinder is nitric acid.  
   
   
       39 . The method of  claim 36  wherein the greenware part is sintered under negative pressure.  
   
   
       40 . A method of manufacturing a broadhead for an arrow, the broadhead being of unitary construction and comprising an elongate ferrule and at least on blade member extending generally radially outwardly therefrom, the method comprising the steps of: 
 providing a broadhead mold having a mold cavity defining the broadhead;    injecting metallic granules under pressure into the broadhead mold to form a greenware part;    debinding the greenware part using a catalytic debinder; and    sintering the greenware part under ambient pressure in a sintering furnace to form the broadhead.    
   
   
       41 . The method of  claim 40  wherein the granules are polyacetal-based granules.  
   
   
       42 . The method of  claim 40  wherein the catalytic debinder is nitric acid.  
   
   
       43 . The method of  claim 40  wherein the greenware part is sintered under negative pressure.