Draw extending archery system
OwnerRobert DeBoleinventor
Life of this patent
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Abstract
A draw extending archery system enables a user to draw a draw string multiple times to store energy. Embodiments of the system include a transmission that operatively engages the draw string and a flexible limb. From an initial rest position, the user initiates a charging stroke on the draw string. During a first charging stroke, the transmission engages to store energy during the draw. At the end of the charging stroke, the transmission engages to prevent release of stored energy. The transmission also disengages the draw string to enable a subsequent charging stroke from an intermediate rest position. From a final rest position, the user initiates a firing stroke on the draw string. At the end of the firing stroke, the transmission couples the draw string and the flexible limb to release stored energy through the draw string.
Claims24
An archery apparatus, comprising:
- a riser;
- a flexible limb;
- a draw string;
- a tension string;
- and
- a transmission comprising:
- a first cam component coupled to the draw string for receiving a first and second input torque,
- a second cam component coupled to the tension string for compressing the flexible limb, and
- a reduction component operatively coupling the first cam component to the second cam component when receiving the first and second input torque, and configured to convert the input torque received at the first cam component to a first and second output torque received at the second cam component.
A method of storing energy in a flexible limb, comprising:
- compressing the flexible limb to store an amount of energy in response to each of a first and second input torque received at a first cam, including the steps of:
- coupling the first cam to a reduction component, the reduction component converting input torque received at the first cam to an output torque;
- coupling a second cam to the reduction component to receive the output torque, wherein the second cam causes compression of the flexible limb in response to each of the first and second input torques;
- and
- releasing substantially the sum of energy stored in the flexible limb into a string of a bow by decoupling at least one of the first cam and the second cam from the reduction component.
A method of operating a bow comprising:
- receiving two or more input torques at a first transmission component in response to two or more charging strokes for storing energy in one or more flexible limbs;
- a step for coupling the first transmission component with a second transmission component during each one of the two or more charging strokes to store energy in the one or more flexible limbs;
- and
- a step for decoupling the first transmission component from the second transmission component in response to a last charging stroke in the two or more charging strokes to release substantially the sum of energy stored in the one or more flexible limbs during the charging strokes into a string of the bow.
Dependencies are inferred from the claim text.