To all:
I work for a company that caters to the material handling industry. A distributor has approached us looking to design a cart to move a heavy load vertically (down) using gravity only. I am looking to source extra long shock absorbers or dampeners that will allow this to happen. Specifically, I am looking to move the cart 72" and it will carry a load of 2500#. Powered hydraulics and pneumatics are not an option; the unit must be self contained.
/R,
NearBeer