Threaded Insert for Use with Archery Arrows and Crossbow Bolts

• US 20170227338A1
• Filed: 02/10/2017
• Published: 08/10/2017
• Est. Priority Date: 02/10/2016
• Status: Abandoned Application

• Current Assignee: FeraDyne Outdoors, LLC
• Original Assignee: FeraDyne Outdoors, LLC
• Inventors: Haas, Matthew Peter
• Application Number:
  US15/429,593
• Publication Number:
  US 20170227338A1
• Time in Patent Office: Days
• CPC Class Codes: F42B 6/04 Archery arrows F42B6/08, F41B5/06, F42B12/362 take precedence
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

Inserts for coupling a broadhead and an arrow shaft or a crossbow bolt, wherein an internal thread pattern in the tube is different from an external thread pattern at an end of the broadhead.

Claims

1. An insert for coupling a broadhead and an arrow shaft, the insert comprising a tube comprising a threaded portion having an internal thread pattern configured for threadably engaging a threaded end of a broadhead, wherein

the internal thread pattern of the tube is different from an external thread pattern on the threaded end of the broadhead;

and

at least a portion of the tube is disposed within an opening at an end of the arrow shaft.

2. The insert of claim 1, wherein the internal thread pattern comprises:

a first thread flank disposed in a first direction at a first angle relative to a line parallel to an axial centerline of the insert; and

a second thread flank disposed in a second direction at a second angle relative to the line parallel to the axial centerline of the insert, the second thread flank comprising a wedge ramp disposed in a third direction at a third angle relative to the line parallel to the axial centerline of the insert.

3. The insert of claim 2, wherein

the first and the second angles are substantially equal;

and

the third angle is different from the substantially equal first and the second angles.

4. The insert of claim 3, wherein

the first and the second angles each are approximately 60 degrees;

and

the third angle is approximately 30 degrees.

5. The insert of claim 3, wherein the external thread pattern comprises a pair of thread flanks each disposed at an angle substantially equal to the substantially equal first and the second angles

6. The insert of claim 2, wherein

an angle between the first thread flank and the wedge ramp is approximately 90 degrees;

and

an angle between the second thread flank and the wedge ramp is approximately 30 degrees.

7. The insert of claim 2, wherein the first thread flank and the wedge ramp intersect at a thread root on an internal surface of the tube.

8. The insert of claim 7, wherein the second thread flank and the wedge ramp intersect at a location opposite the thread root.

9. The insert of claim 2, wherein the first and the second thread flanks are adapted to receive a thread of the external thread pattern.

10. The insert of claim 9, wherein the first and the second thread flanks and the external thread pattern have complementary profiles.

11. The insert of claim 9, wherein the external thread pattern comprises at least one thread flank, wherein at least a portion of a surface of the at least one thread flank contacts at least a portion of a surface of the wedge ramp.

12. The insert of claim 2, wherein the insert comprises:

a plurality of the first thread flanks;

a plurality of the second thread flanks; and

a plurality of wedge ramps.

13. The insert of claim 1, wherein the internal thread pattern comprises a unidirectional threadform.

14. The insert of claim 13, wherein the unidirectional threadform is configured to engage with a conventional threadform.

15. The insert of claim 14, wherein

the unidirectional threadform comprises a plurality of wedge ramps;

and

the conventional threadform comprises a plurality of crests;

wherein, the plurality of the wedge ramps and the plurality of the crests are wedged together with a relatively large force.

16. The insert of claim 15, wherein radial clearances between the plurality of wedge ramps and the plurality of crests is substantially reduced.

17. The insert of claim 15, comprising a substantially continuous contact between the internal thread pattern and the external thread pattern.

18. The insert of claim 14, wherein a threaded engagement between the unidirectional threadform and the conventional threadform substantially reduces lateral movement between the internal and the external thread patterns.