Retainer for broadhead blades

1. A broadhead, comprising:

a ferrule;

an elastic collar; and

a plurality of blades pivotally coupled to the ferrule, each blade comprising:

a retention region; and

a deployment region defined at least in part by a first and a second deployment edge;

wherein,

a first biasing force exerted by the collar on the retention region retains the blades in a retracted position;

a first deployment biasing force exerted by the collar on the first deployment edge retains the blades in a first deployed position; and

a second deployment biasing force exerted by the collar on the second deployment edge retains the blades in a second deployed position.

2. The broadhead of claim 1 , wherein each blade is displaced from the retracted position towards the first deployed position when a force exerted on at least a portion of the blade is greater than the first biasing force.

3. The broadhead of claim 2 , wherein the blade is displaced towards the retracted position when the force decreases.

4. The broadhead of claim 2 , wherein the blade is displaced to the first deployed position.

5. The broadhead of claim 4 , wherein the blade is displaced towards the second deployed position when the force is greater than the first deployment biasing force.

6. The broadhead of claim 5 , wherein the blade is displaced towards the first deployed position when the force decreases.

7. The broadhead of claim 5 , wherein the blade is displaced to the second deployed position.

8. The broadhead of claim 7 , wherein a cutting edge of the blade forms an obtuse angle with a longitudinal axis of the ferrule.

9. The broadhead of claim 5 , wherein the blade is displaced towards the second deployed position when the force decreases.

10. The broadhead of claim 4 , wherein a cutting edge of the blade is substantially orthogonal to a longitudinal axis of the ferrule.

11. The broadhead of claim 2 , wherein:

each blade comprises an impact region; and

at least a portion of the force is exerted on at least a portion of the impact region.

12. The broadhead of claim 2 , wherein displacement of the blade from the retracted position exposes at least a portion of a cutting edge of the blade.

13. The broadhead of claim 12 , wherein at least a portion of the force is exerted on at least a portion of the cutting edge of the blade.

14. The broadhead of claim 2 , wherein the blade is displaced towards the first deployed position when the force decreases.

15. The broadhead of claim 1 , wherein the ferrule comprises as least one recess configured for housing at least a portion of one or more blades.

16. The broadhead of claim 15 , wherein each blade comprises a leading edge having at least a portion thereof housed in at least a portion of the at least one recess.

17. The broadhead of claim 16 , wherein

at least a portion of the leading edge is configured as a cutting edge;

at least a portion of the cutting edge is housed within the recess; and

displacement of the blade from the retracted position exposes at least a portion of the cutting edge.

18. The broadhead of claim 1 , wherein each blade is displaced towards the second deployed position when the collar ruptures after the broadhead impacts a target.

19. The broadhead of claim 1 , wherein each blade is displaced towards the second deployed position when a force exerted on at least a portion of the blade is greater than the first and the second deployment biasing forces.

20. The broadhead of claim 1 , wherein a cutting radius of each blade is defined at least in part by a distance between a longitudinal axis of the ferrule and an outermost tip of the blade.

21. The broadhead of claim 20 , wherein the cutting radius of each blade in the first deployed position is greater than the cutting radius of each blade in the second deployed position.