A VARIABLE FLUID FLOW HYDRAULIC PUMP

摘要

A variable fluid flow hydraulic pump including one or more displacement bodies 2 having a fixed volume chamber 3. Within this fixed volume chamber 3 a piston 4 cycles or reciprocates thus providing for the movement of fluid. Also present is a low pressure valve 9 connecting said displacement chamber with the low pressure side 5.Also present in embodiments of the present invention on the high pressure side 7 is a high pressure valve 6. The low pressure valve 9 is provided with adjustable means10 or Fcontrol providing an opening force thereon and further providing a closing force, which periodically increases during the pumping stroke and decreases during the suction stroke of said piston 4 reciprocating within the displacement body 3 and further comprises means to supply fluid from the low pressure side 5 to said fixed volume chamber 3 of the displacement body 3 while the pressure in the displacement chamber 3 is less than that of the low pressure side 5.