![]() ![]() A crossbow incorporating the draw mechanism of claim 1, further comprising: a barrel a stock connected to the barrel at the rear of the crossbow a bow connected to the barrel at the front of the crossbow and comprising two bow limbs a bowstring connected to the bow limbs and a trigger mechanism, wherein: the draw mechanism is arranged on the crossbow to draw the bowstring in the first direction rearward along the barrel.ġ3. The draw mechanism of claim 1 wherein the catch is arranged (i) to position the drawn bowstring to be retained by a trigger mechanism of the crossbow, and (ii) to release the drawn bowstring retained by the trigger mechanism.ġ2. The draw mechanism of claim 1 wherein the catch is arranged to release the drawn bowstring to shoot the crossbow in response to actuation of a trigger mechanism of the crossbow.ġ1. The draw mechanism of claim 1 further comprising at least one reduction gear pair coupling (i) the drive gear and the coupling gear or (ii) the coupling gear and the rotary drive member.ġ0. The draw mechanism of claim 1 wherein the diameter of the coupling gear is greater than the diameter of the drive gear.ĩ. The draw mechanism of claim 6 wherein the rotary drive member comprises a drive sprocket, the idler member comprises an idler sprocket, and the tension member comprises a chain engaged with the drive sprocket and the idler sprocket.Ĩ. The draw mechanism of claim 1 further comprising an idler member engaged with the tension member, wherein (i) the tension member or (ii) the tension member and the catch form a closed loop, so that rotation of the coupling gear in the second rotation direction causes the rotary drive member to tension the tension member to move the catch in the second direction.ħ. The draw mechanism of claim 1 wherein the one-way rotary clutch comprises a roller clutch or a sprag clutch.Ħ. The draw mechanism of claim 1 wherein relative rotation of the coupling gear and the retaining member in the first rotation direction is substantially silent.ĥ. The draw mechanism of claim 1 wherein the rotary drive member comprises a drive sprocket and the tension member comprises a chain engaged with the drive sprocket.Ĥ. ![]() The draw mechanism of claim 1 wherein the retaining member comprises a retaining gear and the retainer comprises a pawl arranged to releasably engage the retaining gear to substantially prevent rotation of the retaining gear when engaged and to permit substantially unrestricted rotation of the retaining gear when released.ģ. A draw mechanism for a crossbow, the draw mechanism comprising: a drive gear arranged to be rotated by a user of the crossbow a coupling gear coupled to the drive gear a retaining member mounted coaxially with the coupling gear a one-way rotary clutch arranged to couple the retaining member and the coupling gear to allow their relative rotation in a first rotation direction and to substantially prevent their relative rotation in a second rotation direction opposite the first rotation direction a retainer arranged to releasably engage the retaining member to retard or prevent rotation of the retaining member when engaged and to permit substantially unrestricted rotation of the retaining member when released a rotary drive member coupled to the coupling gear a tension member engaged with the rotary drive member and a releasable catch connected to the tension member and arranged to retain a bowstring of the crossbow as it is drawn, wherein the draw mechanism is further arranged so that: rotation of the coupling gear in the first rotation direction causes the rotary drive member to tension the tension member to move the catch in a first direction to draw the crossbow engagement of the retainer with the retaining member substantially retards or prevents rotation of the coupling gear in the second rotation direction thereby retarding or preventing movement of the catch in a second direction opposite the first direction and release of the retaining member by the retainer allows rotation of the retaining member and the coupling gear in the second rotation direction thereby allowing movement of the catch in the second direction.Ģ. ![]()
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