Power transmission

Claim 1

A power transmission comprising a base support; a chambered cylindrical housing mounted on said support, having an end wall and a removable front plate with aligned apertures in said wall and plate on a horizontal axis; a rotatable crankshaft axially disposed through said housing with portions of said crankshaft journalled and mounted on supports on the exterior and independent of said housing; at least one pair of equally spaced rods on and projecting radially from said crankshaft within said housing; a radially adjustable piston pivotally mounted on each rod on an axis parallel to the crankshaft and yieldably biased outwardly in axial alignment with said rod on rotation of said crankshaft; spring means on each rod engagable with its piston when pivoted approximately 90° with respect to said rod adapted to bias said piston toward alignment with its rod; cam rollers journalled upon said pistons on axes parallel to the housing axis; said housing having an arcuate cam bore operatively engaging said rollers; said bore including a circular portion of uniform maximum radius throughout 225°, approximately; merging into a cam surface of reduced minimum dimension which merges into a circular portion of minimum radius for 90°, approximately; and a run out arcuate sector of 45°, approximately starting from said minimum radius, at one end pivotally mounted on said housing and at its other end, having a radial step surface extending towards said cam bore at its maximum radius; each piston as it traverses the circular cam bore portion of maximum radius, being in alignment with its rod, and as it progressively traverses the cam surface of reduced minimum dimension and said run out sector, being pivoted progressively at angles up to 90° relative to its rod; whereby one piston when traversing the bore of maximum radius has an increased leverage with respect to the other piston simultaneously traversing the cam portions and reduced radius portions of said bore and sector.