Reciprocating rotary engine

A reciprocating, rotary, combustion engine, comprising:

• (a) a hollow, non-rotatable support block member of predetermined length and adapted to be supported in an operative position,
• (b) at least one cylinder member support in said block member such that the ends of said cylinder open to the outside of said block member and whereby within said block member there is space externally of the cylinder, said cylinder including opposed pistons with piston rods extending out of the opposed ends of said cylinder and said piston rods being provided at their outer ends with follower bearing means for engaging a driven cam surface,
• (c) a rotary output member mounted for rotation around said support block member and including a generally round exterior surface and a continuous interior driven cam surface for said cylinder, pistons and piston rods spaced from said support block, said driven cam surface being engaged by said follower bearing means to rotate said output member,
• (d) said driven cam being shaped such that it includes predetermined arcuate areas of constant radius from the axis of the rotary member at least for radially opposed top dead center positions for said pistons in order to allow for predetermined periods of time and degrees of rotation at which the chamber between the pistons is at constant volume, said cam also providing at least radially opposed bottom dead center positions, and said cam further being so shaped that every radius therein has an equal and opposite counterpart radius,
• (e) said cam also being shaped after the top dead center constant volume areas to provide radially opposed rapid expansion areas of a predetermined number of degrees of rotation of the rotary output member in which a first portion of each of said rapid expansion areas moves the piston away from top dead center at an accelerating velocity and a second portion moves the pistons away at a decelerating velocity toward bottom dead center, and
• (f) said cylinder being provided with means for admitting fuel thereto, means for timed ignition of the same and further provided with air intake and exhaust gas manifolds and means for selectively opening and closing said cylinder to said intake and exhaust manifolds.