Over the arrow shaft broad head

• US 5,496,043 A
• Filed: 08/07/1992
• Issued: 03/05/1996
• Est. Priority Date: 08/07/1992
• Status: Expired due to Fees

• Current Assignee: Lee Ester
• Original Assignee: Lee Ester
• Inventors: Ester, Lee
• Primary Examiner(s): SHAPIRO, PAUL
• Application Number:
  US07/926,502
• Time in Patent Office: 1,306 Days
• Field of Search: 273/416, 273/419-422
• US Class Current: 473/584
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

An overshaft hunting broadhead is used to duplicate practice arrow balance point and flight characteristics. Assuming the optimal balance point of the practice arrow is in accord with manufacturer'"'"'s recommendations, removal of the practice arrow point and converting to an overshaft hunting broadhead will duplicate the balance point, weight and flight characteristics of the arrow the archer has become accustomed to while practicing. The arrow shaft enters the ferrule of the overshaft hunting broadhead. The ferrule is free to rotate about the axis of the arrow'"'"'s shaft to be properly positioned, then securely tightened by rotating the arrow tip. The ferrule is equipped to hold cutting edges (razors). The ferrule is coupled securely to the end of the arrow shaft by a hunting point tip that couples into a standard threaded insert in the arrow shaft. The broad head ferrule will not experience the load at impact that is typical to existing broad head styles due to the reinforcement of the arrow shaft by an arrow shaft insert located concentrically and internally beneath the overshaft broadhead ferrule.

Claims

1. In an arrow having an arrow shaft with a threaded insert at a first end thereof, said insert being internal to and concentric with said shaft, and an arrow tip, having a threaded extension, thread coupled to said insert, the improvement comprising:

a broad head cutting blade;

means coupled to said shaft for coupling said broad head cutting blade to said arrow shaft at first end of said shaft and above the outer surface of said shaft;

wherein said means for coupling said broad head cutting blade to said arrow shaft further comprises means coupled to said shaft for lockingly, removably coupling said broad head cutting blade to said shaft; and

wherein said means for lockingly, removeably coupling said broad head cutting blade to said shaft comprises locking means coupled to said shaft in cooperation with said arrow tip whereby the threaded rotation of said tip functions to lock and release said broad head cutting blade from its coupling with said shaft; and

wherein said locking means comprises means coupling said arrow tip, said shaft, and said cutting blade for drawing said cutting blade into locked, intimate contact with said outer surface of said shaft as said tip is threadedly rotated into said threaded insert and for releasing said locked, intimate contact as said tip is threadedly rotated out of said threaded insert.

2. The improvement of claim 1 wherein said means for drawing said cutting blade into locked intimate contact with said shaft further comprises means for lockingly positioning said cutting blade at selected radial angles with respect to said shaft.

3. The improvement of claim 2 wherein said means for lockingly, removably coupling said broad head cutting blade to said shaft comprises:

a ferrule rotatingly encompassing said first end of said arrow shaft and extending a selected length away from said first end along said arrow shaft;

said broad head cutting blade removably coupled to said ferrule; and

extending along said ferrule away from said first end of said arrow shaft; and

means for lockingly coupling said blade and said ferrule to said shaft at a selected radial angle to said shaft.

4. In an arrow having an arrow shaft with a threaded insert at a first end thereof, said inert being internal to and concentric with said shaft, and an arrow tip, having a threaded extension, thread coupled to said insert, the improvement comprising:

a board head cutting blade;

means coupled to said shaft for coupling said broad head cutting blade to said arrow shaft at said first end of said shaft and above the outer surface of said shaft;

wherein said means for coupling said broad head cutting blade to said shaft comprises;

a ferrule rotatingly encompassing said first end of said arrow shaft and extending a selected length away from said first end along said arrow shaft;

said broad head cutting blade removably coupled to said ferrule and extending along said ferrule away from said first end of said arrow shaft; and

means for lockingly coupling said blade and said ferrule to said shaft at a selected radial angle to said shaft;

wherein said means for lockingly coupling said blade and said ferrule to said shaft at a selected radial angle comprises compression means couple to said arrow tip for exerting a compressive force on said broad head cutting blade for lockingly positioning said as ferrule and said cutting blade on said arrow shaft as said arrow tip is threadedly rotated into said insert; and

wherein said ferrule has an outer wall with a longitudinal slot therethrough, said broad head cutting blade coupled within said slot and thereby in contact with the surface of said arrow shaft.