Patent ID: 7721685

Claim:
A power train assembly in a rotary power device ( 100 ) having a stationary block ( 10 ) having a central axis ( 101 ), said block ( 10 ) supporting an axially disposed, rotatable crankshaft ( 30 ), a plurality of axially oriented spaced cylinders ( 8 ) formed within said block ( 10 ), said rotatable crankshaft ( 30 ) supporting a curved track ( 80 ), a plurality of dual headed pistons ( 60 ) slidingly supported in each of said axially oriented spaced cylinders ( 8 ), each piston ( 60 ) supporting a cam follower pin ( 63 ) which extends radially inwardly and terminating in a cam follower member ( 67 ) riding in said curved track ( 80 ) so that as the curved track ( 80 ) rotates with respect to said block ( 10 ), the pistons ( 60 ) oscillate in the cylinders as said cam follower members ( 67 ) ride in said curved track ( 80 ) wherein the improvement of said power train assembly comprises: the curved track being formed by two adjacent separate opposing power sleeves (emphasis added); wherein one/each of said two power sleeves having a hollow cylindrical body portion spaced from said rotatable crankshaft and being secured to said rotatable crankshaft on an inner surface of a power sleeve on an outer surface of one of a pair of mounting brackets which are axially and rotationally fixed to said rotatable crankshaft, and wherein said one/each of the power sleeves ( 70 ) forms one half of said curved track.