Patent ID: 8894384

Claim:
A fluid motor/pump, the improvement comprising: (a) a motor block having a plurality of cylinders having interiors and arranged radially about a drive shaft; (b) a corresponding plurality of pistons, each piston mounted within a different one of said cylinders for reciprocating movement therein, and each piston connected by a piston rod to said drive shaft to drive, or be driven by, said drive shaft; (c) each cylinder having an enclosed top with an input port and an exhaust port extending through said top to provide fluid communication with the interior of said cylinder, said input port and exhaust port separated from each other axially along the motor block and drive shaft by a bridge formed therebetween; (d) a center mounting plate circumscribing and secured to said motor block and extending radially therefrom, said center mounting plate in sealing engagement with said motor block and in contact with each bridge to separate the input ports from the exhaust ports; (e) a rotary intake valve and a rotary exhaust valve each mounted for rotation with said drive shaft and each extending radially therefrom and terminating in an axially extending flange; the axially extending flange of the rotary intake valve extending axially over and in close radial proximity to the input ports of the cylinders; the axially extending flange of the rotary exhaust valve extending axially over and in close radial proximity to the exhaust ports of the cylinders; and (f) each of the axially extending flanges of the rotary valves including slots therein so that when the slots align with an input port or an exhaust port, a fluid passageway is presented to permit fluid to enter or exhaust from a cylinder longitudinally of the cylinder.