In some embodiments, a limb assembly comprises a limb cup, a first limb member and a second limb member. The first limb member supports a rotatable member. The first limb member is supported by the limb cup at a first location and is supported by the second limb member at a second location. The second limb member is supported by the limb cup. The second limb member applies a supporting force to the first limb member.

A bow capable of replacing the cable more easily is provided. A bow, includes: a bow body; a plurality of string cams around which each of both ends of a string for nocking an arrow is wound, the string cams being rotated when the string is drawn; a plurality of cable cams around which each of both ends of an elastically deformable cables is wound, each of the cable cams being rotated interlockingly with each of the string cams to elastically deform the cables; and a plurality of holders, each of the holders having a base portion pivotably held on each of both ends of the bow body and an end portion for rotatably holding each of the cable cams.

A method of constructing a crossbow may include the steps of: supporting the riser to the main beam; supporting a pair of bow limbs to the ends of the riser; separating the bow limbs such that a minimum distance between them is not greater than about 5 inches; supporting the bowstring to the bow limbs; and providing at least a portion of the opening in the riser to be as wide as a user's foot and to extend between the bow limb.

A dual-cam archery bow with simultaneous power cable take-up and let-out journals. Each cam has power cable journals located on opposite sides of the draw string journal, where at least one of power cable journals is a helical journal.

A crossbow assembly may include a riser and a pair of bow limbs that attach to the riser. The limb attachment surfaces on the riser may be separated such that a minimum distance between them is not greater than 5 inches. The minimum distance may be at least as wide as a user's foot. The riser may have an opening that extends between the limb attachment surfaces. The limb attachment surfaces may be angled between 60 and 30 degrees. The riser may have a foot stirrup that begins behind the limb attachment surfaces and extends beyond them.

A crossbow including first and second flexible limbs attached to a center rail. A first cam is mounted to the first bow limb and rotatable around a first axis. A draw string is received in string guide journals and is secured to first and second cams. The draw string unwinds from the string guide journals as it translates from a released configuration to a drawn configuration. Power cables are received in first and second power cable take-up journals on each of the first and second cams. As the crossbow is drawn from the released configuration to the drawn configuration the first and second power cables wrap onto the respective first and second 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.

Described is an archery device for transmitting power aimed at transmitting power from at least one limb to at least one arrow using at least one cam which is operatively connected to two or more flexible, substantially inextensible elements, designed to withstand tensile stress (cables and strings or tracts thereof), simultaneously operating at least one string tract and several cable tracts, the latter, in different directions to each other, wherein the net radial moment is determined by the combination of tensions and directions of the elements connected to it. This increases the design freedom when positioning the cam and reduces the friction linked to its rotation against a support, if necessary, making it possible to do without a support, thereby eliminating friction and improving efficiency.

In some embodiments, an archery bow comprises a frame, a first limb assembly supporting a first rotatable member and a second limb assembly supporting a second rotatable member. The first rotatable member comprises a cam. A bowstring extends between the first rotatable member and the second rotatable member. A power cable is in communication with the cam. The first limb assembly has a width and a length, wherein the width is at least 26% of the length. In some embodiments, the width is at least 28% of the length.

Crossbows are provided having a barrel with one limb and one winding system mounted to each of two opposite sides of the barrel. Each winding system has a limb string connected to one of the limbs and a limb cam about which the limb string can be wound. The limb cams are connected to and positioned apart from arrow string cams by respective interconnects and an arrow string extends across the barrel from an arrow string cam on one side of the barrel to an arrow string cam on the other side of the barrel. The limbs provide first forces urging the limb strings to unwind from the limb cams and the interconnects receive the first forces and convey a second forces to the arrow cams urging the arrow cams to rotate so as to wind the arrow strings onto the arrow cams. The arrow string is drawn against such urging.

A compound bow system includes a compound bow with a bow string; a first pulley engaged with the bow string; a cam attachment having a smaller diameter than the first pulley and positioned on a front surface of the first pulley; and a trigger attached to the front surface of the first pulley; the first pulley and cam attachment are connected via the trigger; and the first pulley is so that when the trigger is engaged, the cam attachment holds a force.