Patent ID: 8366345

Claim:
A screed machine comprising a support frame, a machine control system associated with said machine, a screed blade interconnected to said frame, a screed-axis weight module operatively interconnected to said screed blade, said screed-axis weight module comprising a screed weight disposed within a screed weight housing, an elongated slot formed in said screed weight perpendicular to the travel direction of said screed weight, an eccentric cam disposed in said elongated slot formed in said screed weight to impart reciprocating motion to said screed weight, a travel-axis weight module comprising a travel weight disposed within a weight guide, an elongated slot formed in said travel weight perpendicular to the travel direction of said screed machine, an eccentric cam disposed in said elongated slot formed in said travel weight to impart reciprocating motion to said travel weight, said weight guide disposed within a spring frame, a pair of springs attached respectively to opposite ends of said travel weight and to said spring frame, and said travel-axis weight module operatively interconnected to said machine and comprising said spring frame slideable with respect to said support frame to simultaneously increase the compression of one of said springs and decrease the compression of the other of said springs.