I'd tend to think that it would take a pretty revolutionary cam to do it, and I'd think it would be more like a ratchet than a cam, but the more I mull it over, the more I think that it's possible. The physics are there, so really, all one would need to do is devise a simple machine to make it happen.

I know that draw-locking devices are illegal in many parts, but really, this wouldn't be a "draw lock" per se - it would be more of a potential energy storage device. Definitely something that the archery world has never seen.

Come on all you engineers out there, this is our shot to revolutionize bowhunting as we know it. Besides, it's Friday, and I wanna think about something other than work.