Fluid motor

Claim 1

An opposed piston fluid motor comprising a pair of angularly related cylinders having adjacent ends rigidly joined in a common plane oblique to the axis of each cylinder and remote open ends, a base, means mounting said pair of cylinders spaced above said base with said common plane in which the adjacent ends of the cylinders lie perpendicular to the base, and with the cylinders inclined downwardly from said common plane toward said base in the manner of an inverted V, a pair of pistons, there being a different one of said pistons reciprocably mounted in each of said cylinders, a separate piston rod for each piston, each of said piston rods extending outwardly through the open end of a cylinder and having an inner end pivotally connected to one of the pistons and an outer end located outside of the cylinder in which the piston reciprocates, a pair of oscillating arms, each arm having one end pivotally supported from said base and another end pivotally connected to the outer end of one of the piston rods, means mounting each of said oscillating arm to oscillate about an axis parallel to said common plane and in a plane normal to said common plane, a crank shaft, means rotatably mounting said crankshaft above said base to rotate about an axis parallel to said base and lying in said common plane, said crankshaft having a pair of axially displaced cranks, angularly displaced 180° from each other, a pair of connecting rods having opposite ends, one of said connecting rods having one end pivotally connected to one of said cranks and an opposite end pivotally connected to the pivot connection between one of said piston rods and one of the oscillating arms, the other connecting rod having one end pivotally connected to the other of said cranks and having an opposite end pivotally connected to the pivot connection between the other of said piston rods and the other of said oscillating arms, a fly wheel mounted on said crankshaft to rotate therewith, said pistons each having a working face, the working faces of said pair of pistons facing each other within said cylinders, an expansible working chamber within said cylinders between the working faces of the pistons, a fluid port communicating with said expansible working chamber at the adjacent ends of said cylinders, a fluid control valve means for cylically admitting pressurized fluid to said expansible working chamber and exhausting exhaust fluid from said expansible working chamber, and fluid conduit means connecting said fluid control valve means with said fluid port, said control valve means being operatively connected to said crankshaft.