Invention Grant
US08387604B1 Compound bow 失效
复合弓

Compound bow
Abstract:
A compound bow, recurve bow, long bow, or crossbow with two idler pulleys that allow for a faster decrease in bowstring angle in relation to the arrow thereby increasing the amount of stored energy during the draw stroke and decreasing the distance required to reach peak draw weight. The two idler pulleys also allow the force draw curve to be designed around the human body kinematic strengths as opposed to the limitations of the bow geometry.
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