# US 7,410,434 B2 · Archery broadhead with replaceable blades > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,410,434 B2 - Document ID: US7410434B2 - Status: Granted - Kind: B2 - Application number: 11/046,237 - Filed: 2005-01-31 - Published: 2005-12-29 - Granted: 2008-08-12 - Earliest claimed: 2002-10-24 - Assignees: Liberty Research Co. - Inventors: Derrick Perkins, Sr. - Web page: https://patentgrep.com/patent/US7410434B2 ## CPC - F42B 6/08: Arrow heads; Harpoon heads - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) ## Abstract A broadhead includes a ferrule for mounting an arrowshaft, the ferrule having a locking portion. At least two blades are mounted on the ferrule (three are used in the preferred embodiment), the blades being coupled to the ferrule in their center portions by notches that mate with the locking portion of the ferrule. A locking nut is mounted on a rear portion of the ferrule for holding the three blades in place on the ferrule when the locking nut is tightened. ## Claims ### Claim 1 A broadhead ferrule, comprising: a body portion with at least two slots formed at least partially therein along a longitudinal axis thereof to receive blades, wherein the blades have notches located at about their mid-section; and a locking portion having a flange that engages the blade notches upon assembly of the blades with the ferrule; wherein the locking portion secures the blades when a force is applied to a rear edge of the blades. ### Claim 2 (depends on 1) The broadhead ferrule of claim 1, wherein the force is applied by a locking device when it is removably attached to a rear body portion of the ferrule. ### Claim 3 (depends on 2) The broadhead ferrule of claim 2, wherein the locking device is a locking nut. ### Claim 4 (depends on 3) The broadhead ferrule of claim 3, wherein the locking nut and the rear body portion of the ferrule include complementary threads. ### Claim 5 (depends on 1) The broadhead ferrule of claim 1, wherein the flange comprises at least two slots. ### Claim 6 (depends on 1) The broadhead ferrule of claim 1, further comprising a rear body portion adapted to receive a locking device to secure the blades against the locking portion upon assembly. ### Claim 7 (depends on 1) The broadhead ferrule of claim 1, wherein the blades are arranged to produce a cut-on-impact blade configuration. ### Claim 8 (depends on 1) The broadhead ferrule of claim 1, further comprising a threaded end that mates with a threaded portion of an arrowshaft. ### Claim 9 (depends on 1) The broadhead ferrule of claim 1, wherein the body portion comprises: a conical ferrule tip portion; a conical front portion coupled to the conical ferrule tip portion; a forward cylindrical body portion coupled between the conical front portion and the flange; a center cylindrical body portion coupled to the flange; and a mating portion coupled to the center cylindrical body portion to thereby attach the broadhead ferrule to an arrowshaft. ### Claim 10 A method of making a broadhead ferrule, comprising: forming a body portion with at least two slots formed at least partially therein along a longitudinal axis thereof to receive blades, wherein the blades have notches located at about their mid-section; and forming a locking portion with a flange to engage the blade notches upon assembly of the blades with the ferrule; whereby the blades are secured at the locking portion when a force is applied to a rear edge of the blades. ### Claim 11 (depends on 10) The method of claim 10, further comprising forming the broadhead ferrule to receive a locking device that is capable of being removably attached to a rear body portion of the ferrule to apply the force. ### Claim 12 (depends on 11) The method of claim 11, further comprising forming the locking device as a locking nut. ### Claim 13 (depends on 12) The method of claim 12, further comprising forming complementary threads on the locking nut and the rear body portion of the ferrule. ### Claim 14 (depends on 10) The method of claim 10, further comprising forming the flange with at least two slots. ### Claim 15 (depends on 10) The method of claim 10, further comprising forming the ferrule with a rear body portion adapted to receive a locking device to secure the blades against the locking portion upon assembly. ### Claim 16 (depends on 10) The method of claim 10, further comprising forming the ferrule so that upon assembly the blades are arranged to produce a cut-on-impact blade configuration. ### Claim 17 (depends on 10) The method of claim 10, further comprising forming a threaded end on the ferrule to mate with a threaded portion of an arrowshaft. ### Claim 18 (depends on 10) The method of claim 10, further comprising forming the body portion with: a conical ferrule tip portion; a conical front portion coupled to the conical ferrule tip portion; a forward cylindrical body portion coupled between the conical front portion and the flange a center cylindrical body portion coupled to the flange; and a mating portion coupled to the center cylindrical body portion to thereby attach the broadhead ferrule to an arrowshaft.