| 摘要 |
A string guide for a bow including first and second cams are mounted to first and second bow limbs, respectively. Each of the cams includes a string guide journal, an upper power cable take-up journal, and a lower power cable take-up journal. The draw string is arranged in a reverse draw configuration. The upper and lower power cables are received in each of the respective upper and lower power cable take-up journals and are displaced away from the respective draw string journals as the bow is drawn from the released configuration to the drawn configuration. In one embodiment, the upper and lower power cable take-up journals are helical in configuration. As a result of this configuration the cams can rotate more than 270 degrees, and preferably more than 300 degrees, as the bow is drawn from the released configuration to the drawn configuration. |
| 主权项 |
1. A bow comprising:
first and second flexible limbs attached to a riser; a first cam mounted to the first bow limb and rotatable around a first axis, the first cam comprising a first draw string journal having a first plane of rotation perpendicular to the first axis, a first upper power cable take-up journal extending in a direction perpendicular to the first plane of rotation of the first draw string journal, and a first lower power cable take-up journal extending in an opposite direction perpendicular to the first plane of rotation; a second cam mounted to the second bow limb and rotatable around a second axis, the second cam comprising a second draw string journal having a second plane of rotation perpendicular to the second axis, a second upper power cable take-up journal emending in a direction perpendicular to the second plane of rotation of the second draw string journal, and a second lower power cable take-up journal extending in an opposite direction perpendicular to the second plane of rotation; a draw string received in the string guide journals and secured to the first and second cams, wherein the draw string unwinds from the string guide journals as it translates from a released configuration to a drawn configuration; and upper and lower power cables received in the upper and lower power cable take-up journals on each of the first and second cams; wherein as the bow is drawn from the released configuration to the drawn configuration the upper and lower power cables wrap onto the respective upper and lower power cable take-up journals and are displaced along the first and second axes away from the first and second planes of rotation of the first and second draw string journals. |
