Fluid actuated pump system

A control valve comprising,

• a unitary valve housing having a bore extending therethrough,
• a plurality of fluid inlet and outlet ports extending through said valve housing and communicating with said bore,
• a rotatable unitary valve member positioned in said bore,
• bearing means for rotatably supporting said unitary valve member in said bore,
• said unitary valve member having a plurality of inlet ports and a plurality of outlet ports,
• a plurality of internal passages in said unitary valve member for connecting in pairs said inlets with said outlets,
• timing means for rotating said unitary valve member at a preselected rate,
• said timing means being fluid actuated and including a pair of timing gears positioned in meshing relation in a fluid chamber with one of said timing gears being nonrotatably connected to said unitary valve member so that rotation of said meshing gears rotates said unitary valve member at a preselected rate,
• said fluid chamber having an inlet for receiving fluid under pressure from a source and an outlet for conveying fluid under pressure to said unitary valve member such that flow of fluid under pressure from said inlet through said fluid chamber to said outlet rotates said timing gears to rotate said unitary valve member and to convey fluid to said unitary valve member,
• said timing gears being rotatable by said fluid flow at a preselected rate to displace a preselected volume of fluid under pressure to control the volume of fluid being conveyed to said unitary valve member,
• a fluid circuit connecting said timing gears to a source of fluid and to said unitary valve member for controlling the flow of fluid from the source through said timing means to said unitary valve member,
• said fluid circuit including a pilot valve and an operator controllable valve means,
• said pilot valve being positioned in said fluid circuit between the fluid source and said timing means and operable to control the volume of fluid entering said timing means and thereby control the rate of rotation of said timing gears by normally diverting fluid away from said timing means and directing fluid flow from the source to a fluid reservoir,
• said operator controllable valve means being positioned in fluid communication with said pilot valve for actuating said pilot valve to direct fluid flow to said timing means and control the volume of fluid conveyed by said timing means to said unitary valve member,
• said unitary valve member being arranged upon each revolution thereof to rotate between a first valve position and a second valve position,
• a first set of said valve member inlet and outlet ports in said first valve position being positioned in communication with a first set of said valve housing inlet and outlet ports for directing a preselected volume of fluid upon rotation of said timing gears through said unitary valve member and said valve housing in a first flow pattern, and
• a second set of said valve member inlet and outlet ports in said second valve position being positioned in communication with a second set of said valve housing inlet and outlet ports for directing a preselected volume of fluid upon rotation of said timing gears through said unitary valve member and said valve housing in a second flow pattern.