Speed-sensitive crossbow cocking device
First Claim
Patent Images
1. A crossbow cocking device comprisinga speed-sensitive clutch havinga housing;
- an input shaftin operational engagement with an associated crossbow cocking cable, andin selectable rotational engagement with said housing; and
wherein,below a critical rotational speed of the input shaft with respect to the housing, the speed-sensitive clutch will maintain a disengaged state, and at or above the critical speed of the input shaft with respect to the housing, said speed sensitive clutch will automatically switch to an engaged state.
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Abstract
Provided is a crossbow cocking device comprising a speed-sensitive clutch having a housing; an input shaft in operational engagement with an associated crossbow cocking cable, and in selectable rotational engagement with said housing; and wherein, below a critical rotational speed of the input shaft with respect to the housing, the speed-sensitive clutch will maintain a disengaged state, and at or above the critical speed of the input shaft with respect to the housing, said speed sensitive clutch will automatically switch to an engaged state.
51 Citations
20 Claims
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1. A crossbow cocking device comprising
a speed-sensitive clutch having a housing; -
an input shaft in operational engagement with an associated crossbow cocking cable, and in selectable rotational engagement with said housing; and wherein, below a critical rotational speed of the input shaft with respect to the housing, the speed-sensitive clutch will maintain a disengaged state, and at or above the critical speed of the input shaft with respect to the housing, said speed sensitive clutch will automatically switch to an engaged state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of using a crossbow cocking device comprising,
providing an associated crossbow having an associated bow string movable in a first direction, and movable in an second direction; -
providing an associated crossbow cocking cable; providing a crossbow cocking device having, a speed-sensitive clutch having a housing, an input shaft in operational engagement with the associated crossbow cocking cable, and in selectable rotational operational engagement with said housing, and wherein, below a critical rotational speed of the input shaft with respect to the housing, the speed-sensitive clutch will maintain a disengaged state, and at or above the critical speed of the input shaft with respect to the housing, said speed sensitive clutch will automatically switch to an engaged state; and
,engaging the input shaft to the bow string with the associated crossbow cocking cable. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A crossbow comprising
a frame; -
a bow string in operational engagement with the frame and adapted be operated to be moved between an uncocked position, and a cocked position; a crossbow cocking cable in selectable operational engagement with said bow string; a cocking device having a housing, a pulley set in operational engagement with the crossbow cocking cable, said pulley set being adapted to spool in the crossbow cocking cable when rotated in a first direction, and spool out the crossbow cocking cable when rotated in an uncocking direction, a pulley shaft in operational engagement with the pulley set and adapted to rotate the pulley set in either a first direction or a second direction; an input shaft in operational engagement with the pulley shaft through a mechanical transmission whereby the input shaft and the pulley shaft are mechanically linked to transmit work to one another and to impart rotational motion to one another; a speed-sensitive clutch in operational engagement with the input shaft, the speed-sensitive clutch having a first rotor in operational engagement with the input shaft to transmit work and torque therebetween, and rotationally engaged to the housing, a weighted arm rotatably mounted to the rotor, the weighted arm being movable between a first position wherein the arm does not operationally engage the first rotor to housing, and a second position wherein the arm does operationally engage the first rotor to housing, a spring engaged to the weighted arm to apply a spring force to bias the weighted arm toward the first position; wherein, rotation of the input shaft rotates the first rotor and the weighted arm, rotation of the weighted arm at a speed at or above the critical speed results in inertial forces on the weighted arm of sufficient magnitude to overcome the spring force to bias the weighted arm toward the first position and move the weighted arm into engagement with the housing and thereby engage the input shaft with the housing; and wherein the housing is operationally engaged with the frame. - View Dependent Claims (19, 20)
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Specification