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US 10,295,316 B2Granted
Variable cutting diameter arrowhead
OwnerJacob Wukieinventor
Life of this patent
Estimating the term…
Abstract
Arrowheads can include blades which remain deployed to a maximum cutting diameter on contact with soft media and deflect on contact with hard media in a target.
Claims20
A variable cutting diameter arrowhead, comprising:
- a ferrule;
- a blade having a cutting portion, a blade pivot aperture, and a deployment extension, wherein the deployment extension includes a locking geometry and an impact geometry;
- a pivot through the blade pivot aperture rotatably coupling the blade to the ferrule;
- a blade spring longitudinally aligned with the ferrule and disposed adjacent to the deployment extension, wherein the locking geometry and the impact geometry are configured to compress the blade spring to different lengths when rotated to interact with the blade spring;
- and
- a trigger mechanism configured to cause outward rotation of the blade from a stowed position to a deployed position upon actuation of the trigger mechanism,
- wherein the locking geometry is under compression from the blade spring when the blade is rotated in the stowed position,
- wherein the locking geometry biases the blade to resist the outward rotation up to an actuation resistance and allow outward rotation above the actuation resistance,
- wherein the impact geometry is geometrically distinct from the locking geometry, wherein the impact geometry is under compression from the blade spring when the blade is rotated in a deployed position,
- wherein after the blade is rotated into the deployed position the impact geometry biases the blade to resist inward rotation of the blade up to a deflection resistance and allow inward rotation above the deflection resistance,
- wherein the actuation resistance is based on a first compressing longitudinal force applied to the locking geometry when the blade spring is aligned with the locking geometry, and
- wherein the deflection resistance is based on a second compressing longitudinal force applied to the impact geometry when the blade spring is aligned with the impact geometry.
9 more elements
An arrowhead blade, comprising:
- a cutting portion;
- a blade pivot aperture about which the arrowhead blade is configured to rotate;
- and
- a deployment extension having a locking geometry and an impact geometry,
- wherein the locking geometry is subject to a first compressing longitudinal force configured to be applied to the locking geometry based on contact of the locking geometry with a blade spring,
- wherein the blade spring is longitudinally aligned with a ferrule and disposed adjacent to the deployment extension when the blade is rotated in a stowed position,
- wherein the locking geometry biases the blade to resist outward rotation of the arrowhead blade up to an actuation resistance,
- wherein the actuation resistance is a function of the first compressing longitudinal force,
- wherein the impact geometry is geometrically distinct from the locking geometry,
- wherein the impact geometry is configured to be under compression from the blade spring when the blade is rotated in a deployed position,
- wherein the impact geometry is subject to a second compressing longitudinal force configured to be applied to the impact geometry based on contact of the impact geometry with a blade spring,
- wherein after the blade is in the deployed position the impact geometry biases the blade to resist inward rotation of the arrowhead blade up to a deflection resistance and allow inward rotation above the deflection resistance, and
- wherein the deflection resistance is a function of the second compressing longitudinal force.
10 more elements
A method, comprising:
- causing rotation of a blade in an arrowhead,
- wherein the blade has a cutting portion, a blade pivot aperture, and a deployment extension, wherein the deployment extension includes a locking geometry and an impact geometry,
- wherein the arrowhead has a pivot through the blade pivot aperture rotatably coupling the blade to a ferrule,
- wherein the arrowhead has a blade spring longitudinally aligned with the ferrule and disposed adjacent to the deployment extension,
- wherein the locking geometry and the impact geometry are configured to compress the blade spring to different lengths,
- wherein the arrowhead has a trigger mechanism configured to cause outward rotation of the blade from a stowed position to a deployed position upon actuation of the trigger mechanism,
- wherein the blade rotates outward when an effective rearward force on the trigger mechanism exceeds an actuation force,
- wherein the actuation force is based on a locking geometry of the blade and a first compressing longitudinal force applied to the locking geometry when the blade spring is aligned with the locking geometry,
- wherein the blade rotates inward after the blade is rotated into the deployed position when an effective rearward force on the blade exceeds a deflection force,
- wherein the deflection force is based on the impact geometry of the blade and a second compressing longitudinal force applied to the impact geometry when the blade spring is aligned with the impact geometry.
7 more elements
Dependencies are inferred from the claim text.