Patent ID: 6840151

Claim:
A fluid pressure actuated motor comprising: a cylinder block having at least one set of opposed cylinders formed therein, said cylinder block further having a central axis midway between the cylinders and an intake face and an exhaust face at right angles to the axis, said block further having two intake ports for each cylinder formed therein and extending from the intake face of the block to opposite ends of each of the cylinders, said block further having two exhaust ports extending from opposite ends of each of the cylinders to the exhaust face of the block; a piston reciprocable in each of the cylinders; a crankshaft supported by the cylinder block and rotatable about the block axis, said crankshaft having portions extending beyond the faces of the block; a connecting rod connected to each of said pistons and having a Scotch yoke connection to the crankshaft; an intake rotor valve mounted on and rotating with the crankshaft extension at the intake face of the block; an exhaust rotor valve mounted on and rotating with the crankshaft extension at the exhaust face of the block; and means for introducing pressurized fluid to the intake rotor valve; said intake rotor valve and said exhaust rotor valve cooperating to introduce pressurized fluid to and exhaust spent fluid from each of the cylinders of the set in a manner to drive both pistons in the set in the same direction during each stroke of the pistons.