Round wheel cam

F - Mech Eng,Light,Heat,Weapons – 41 – B

Patent

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Details

F41B 5/10 (2006.01)

Patent

CA 2397744

An archery bow includes a handle portion (115), an upper limb (120) supported by the handle portion and a lower limb (140) supported by the handle portion. A top pulley (170) is rotatably mounted upon the upper limb for rotation about a first axle (150). The top pulley includes a pulley track (172). A bottom cam assembly (180) is rotatably mounted upon the lower limb for rotation about a second axle (160). The bottom cam assembly has a primary string payout track (181) and a secondary string payout track (182). The primary string payout track is characterized by a constant radius of curvature.

L'invention concerne un arc comprenant une partie poignée (115), une branche supérieure (120) soutenue par la partie poignée, et une branche inférieure (140) soutenue par la partie poignée. Une poulie supérieure (170) est montée rotative sur la branche supérieure aux fins de rotation autour d'un premier axe (150). La poulie supérieure comprend une jante (172). Un ensemble came inférieur (180) est monté rotatif sur la branche inférieure aux fins de rotation autour d'un second axe (160). L'ensemble came inférieur comporte une première piste de dévidage de corde (181) et une piste secondaire de dévidage de corde (182). La première piste de dévidage de corde est caractérisée par un rayon de courbure constant.

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