Archery Release Device with Bowtie Cam

• US 20110168146A1
• Filed: 01/13/2011
• Published: 07/14/2011
• Est. Priority Date: 01/14/2010
• Status: Abandoned Application

• Current Assignee: Utah State University
• Original Assignee: Utah State University
• Inventors: Deceuster, Andrew
• Application Number:
  US13/006,267
• Publication Number:
  US 20110168146A1
• Time in Patent Office: Days
• US Class Current: 124/35.2
• CPC Class Codes: F41B 5/1469 Bow-string drawing or releasing devices F41B5/1473 takes precedence

Abstract

A triggerless back tension archery release device to assist archers in pulling a bow string to a fully drawn position and then releasing the bow string to fire an arrow. The surprise release timing is dependent upon a bowtie cam which is a bowtie shaped member containing various size corner edge notches. The bowtie cam may be rotated and then fixed at the desired orientation for pulling the arrow to the fully drawn position. The depth of the notch in the bowtie cam determines the surprise release timing. The bowtie cam is designed with a notch on each of the four corners. The bowtie cam may be reoriented to place any one of the four corner edge notches in the active position thus providing various degrees of flexibility for the surprise release timing.

Claims

1. A triggerless back tension archery release device comprising:

a finger grip handle including at least two finger grooves;

a stem attached to and extending away from said handle;

a bowtie shaped bowtie cam with a through hole in the center;

a linkage member;

a bowtie pin passing through said hole in said bowtie cam to fasten said bowtie cam to said stem and said linkage member; and

a sear having a bow string hook on one end and fastened to said linkage member with a sear pin, wherein increasing the tension on the bow string causes the rotation of said sear relative to said bowtie cam resulting in the bow string being released.

2. The device of claim 1 wherein said bowtie cam has two curved side segments, two curved sliding surfaces, and a notch in at least one corner edge.

3. The device of claim 2 wherein said bowtie cam can be re-oriented in said triggerless back tension archery release device to put a different said corner edge in the active position.

4. The device of claim 2 wherein the center regions of said curved side segments are concentric with said hole and have a radius greater than the radius of said hole.

5. The device of claim 4 wherein said sliding surfaces are concentric with said hole and have a radius greater than said radius of said curved side segments.

6. The device of claim 3 wherein said notches in said bowtie cam are different sizes.

7. The device of claim 3 wherein two said notches in said bowtie cam are equal sizes.

8. The device of claim 3 wherein three said notches in said bowtie cam are equal sizes.

9. The device of claim 3 wherein four said notches in said bowtie cam are equal sizes.

10. A cam for a triggerless back tension archery release device comprising:

a component in the shape of a bowtie with

a through hole in the center;

two curved side segments;

two curved sliding surfaces; and

a notch in at least one corner edge.

11. The cam of claim 10 wherein said curved side segments are on opposite sides of said hole and the center regions of said curved side segments are concentric with said hole and have a radius greater than the radius of said hole.

12. The cam of claim 11 wherein said sliding surfaces are on opposite sides of said hole and are concentric with said hole and have a radius greater than said radius of said curved side segments.

13. The cam of claim 10 wherein said notches are different sizes.

14. The cam of claim 10 wherein two said notches are equal sizes.

15. The cam of claim 10 wherein three said notches are equal sizes.

16. The cam of claim 10 wherein four said notches are equal sizes.