Patent ID: 6170412
Filing Date: 2001-01-09
Classification: A01C,F15B,Y02P,Y10S

Abstract:
A hydraulic drive system for an agricultural implement adapted to be connected to a prime mover having a main source of hydraulic power including a main pump and a reservoir, comprising:a hydraulic motor for driving a load, a high pressure supply line connected to an inlet of said hydraulic motor and a low pressure return line connected to an outlet of said hydraulic motor, said supply and return lines adapted to be connected to output and return ports respectively of said main source;a boost pump having an outlet and an inlet in communication with said supply and return lines respectively such that when said drive system is connected to said main source said boost pump is in parallel with said main pump;a drive for said boost pump whereby in use the output of said boost pump complements the output of the main pump to assist in delivering fluid to said hydraulic motor sufficient as to help in maintaining a desired speed thereof; andfluid control means disposed between the outlet of said boost pump and the inlet of the hydraulic motor to further assist in maintaining the desired speed of said hydraulic motor, said fluid control means is operable to control the proportions of the flow volume delivered to said hydraulic motor from each of said main pump and said boost pump.