impressive isnt over engineering
all good engineering is simple
well done him for getting the patent
but the machine has never been sold and never will
it basically replicates a dumbell with 30000 moving parts
rubbish.
if thi8s machine does it, it could be set so that at any position in the movement, the weight elicits maximum tension in the muscle.
a dumbell cannot do that. a dumbell moves in an arc which means that its force at the pivot, near where the biceps attaches, varies greatly.
but, in addition, the tension on the muscle varies greatly due to the arc itself.
so a machine that removes any overly difficult parts of the arc, which are preventing the user from moving the resistance to an angle where there is better mechanical leverage, is a good thing. its essentially like having a cheat portion, but without cheating.
that means the effort you put into the cheat, can be used directly by the muscle.
basically this is how a cable with an adjustable cam on it would work. pretty useless in a public gym where every person has different length levers and insertions.
would be very good for professional athletes who want to nail the specific biomechanics for their own body.