An archery bow comprises a structural riser that comprises a plurality of cells arranged in a repeating pattern. In some embodiments, the riser comprises multiple pluralities of similarly shaped cells, wherein each plurality comprises a different shape. In some embodiments, a bow comprises one or more rotatable members. Each rotatable member can comprise a plurality of cells arranged in a repeating pattern. In some embodiments, cell shapes in the rotatable member(s) are similar to cell shapes in the riser.

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 assembly may include bow limbs on opposite sides and a cam rotatably supported to each bow limb. In some embodiments, the cams on each limb may be identical. In other embodiments, each cam may have a stud on each side of the cam that may engage with the bowstring. In yet other embodiments, each cam may have a channel on each side of the cam that may engage with the bowstring.

In some embodiments, an archery bow comprises a riser, a limb assembly attached to the riser and a stabilizer. The limb assembly comprises a first limb member and a second limb member. The stabilizer is attached to the riser, and at least a portion of the stabilizer is oriented between the first limb member and the second limb member.

A crossbow including a frame with a riser and a center rail. First and second flexible limbs are attached to the riser. A draw string is received in string guide journals in first and second cams rotatably attached to the frame. The draw string unwinds from the string guide journals as it translates between a released configuration and a drawn configuration. The first and second cams include at least first and second power cable take-up journals, respectively. At least first and second power cables are attached to the first and second limbs and received in the first and second power cable take-up journals, respectively. 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.

A projectile launching device includes self-timing without cam lean. The projectile launching device preferably includes a rail, a riser, two energy storing components, (such as two limbs), two cams, a launch string, and at least two cables. The ends of the launch string are attached to the two cams. Opposing ends of first and second cables are coupled to the first and second cams. A mid-segment of the first and second cables are slidably engaged with the first and second cable pulleys, respectively. The two cams are preferably built as mirror images of each other at a centerline of the rail. The two cams include a launch string track, having identical, but mirrored, upper and lower cable tracks.

A crossbow includes a frame, a riser coupled to the frame, a first flexible limb, a second flexible limb, a third flexible limb, and a fourth flexible limb. A first cam assembly couples to the first flexible limb and the second limb and includes a first draw string journal, a first power cable journal, and a second power cable journal. A second cam assembly couples to the third flexible limb and the fourth flexible limb and includes a second draw string journal, a third power cable journal, and a fourth power cable journal. A draw string is received in the first draw string journal and the second draw string journal. Power cables cross over the center rail, above and below the draw string, and are received in the first power cable journal, the second power cable journal, the third power cable journal, and the fourth power cable journal, respectively.

A method for monitoring operation of an archery bow includes attaching an apparatus to a bow cord. The apparatus includes a processor, a monitoring device electrically coupled with the processor, a wireless communication module electrically coupled with the processor, and a power supply electrically coupled with each of the processor and the wireless communication module. The method further includes detecting, by the monitoring device, a tension of the bow cord. The method also includes generating, by the processor and based upon the detected tension of the bow cord, data concerning tension of the bow cord. The method further includes wirelessly transmitting, by the wireless communication module, the data to a remote computing device. The method also includes receiving, by the remote computing device, the data. The method also includes presenting, by the remote computing device and based upon the data, information to a user reflecting the detected tension.

An energy storage system for a bow, the system defined at least in part by a riser, a first and second limb each having a first end coupled to the riser, a first and second wheel disposed at a second end of respective first and second limbs, a first and second power cord each having a first end coupled to the riser and a second end coupled to respective first and second wheels, and a string extending between and coupled to the first and second wheels.

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.