Archery Bow Modular Cam System

Abstract

A modular cam system for an archery bow or crossbow includes swappable cams that change the maximum draw weight of the archery bow or crossbow. Moreover, the modular cams can be affixed to a rotatable member in a number of orientations to set the desired draw length without changing the limbs, tightening or loosening limb bolts, or disassembling the bow. Further, the maximum draw weight of the bow remains substantially similar throughout a large portion of the draw length adjustment for a specified cam module.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This Application claims priority to U.S. Provisional Application No. 61 / 539,885, filed Sep. 27, 2011, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]This invention relates generally to archery bows and more specifically to compound bows having cam adjustability.[0003]Various types of compounding archery bows are generally known in the art. Compounding archery bows generally include a plurality of rotatable members, at least one of which comprises a cam. The cam desirably provides for a reduction in the draw weight when the bow is fully drawn, allowing an archer to hold the bow in a drawn position with less fatigue.[0004]Some compounding bows include at least one rotatable member having a cam, wherein at least a portion of the cam is either adjustable with respect to the rest of the rotatable member or can be removed entirely and replaced with another cam module having a different shape.[...

AI Technical Summary

Benefits of technology

[0024]In some embodiments, an archery bow comprises a riser and opposed limbs, and each limb supports a rotatable member. At least one rotatable member comprises a body and a cam module. The body defines a bowstring payout track and the cam module defines a power cable take-up track. The cam module is rotatably adjustable with respect to the body between first and second orientations. The cam module is removable from the bow without precompressing the limbs or relaxing the tension on the limbs of the bow. In some embodiments, the cam module comprises a hook that engages a portion of the rotatable member body. In some embodiments, the hook comprises a semi-circular portion that abuts a semi-circular portion of the rotatable member body.

Problems solved by technology

The main short coming of this concept is that each module only provides a single draw force profile capability; therefore it would require a multitude of different designed modules to cover all of the normal draw weight and draw length combinations encountered in market place.

However, the '374 concept is even more complex in that it can require a number of add on plates or modules to arrive at a single given draw force configuration.

While this concept requires only one module on each cam that is not readily replaceable or subject to loss, the resulting system is limited in that it does not offer draw weight change capability.

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