Patent ID: 7793623

Claim:
Piston cam engine comprising a housing, a drive or driven shaft ( 39 ), a cylindrical tubular 3D cam ( 3 ) having a cam groove on the inner cylindrical surface, at least one cylinder ( 13 ), a first piston ( 20 ) moving in the cylinder ( 13 ) and a second piston ( 20 ) moving in another cylinder ( 13 ) or a balancer ( 84 ) of the first piston ( 20 ) moving in the housing, at least two guides ( 10 ) for linear reciprocal motion of the first piston ( 20 ) and for the second piston ( 20 ) or the balancer ( 84 ), two followers ( 1 ) having at least two arms ( 26 ), one follower of said two followers being connected to the first piston ( 20 ) and another follower of said two followers being connected to the second piston ( 20 ) or the balancer ( 84 ), and the at least two arms of said two followers ( 1 ) are equally placed compared to the axes of power transmission ( 90 ), as well as rollers ( 2 ) for moving in the cam groove and mounted on the ends of the arms ( 26 ), characterized by the fact that: the guides ( 10 ) are guide columns, parallel and equally placed compared to the axes of the cam ( 3 ); the cam ( 3 ) is composed and comprises two coaxial bushes ( 3 a , 3 b ), each one having corrugated cam section ( 95 a or 95 b ) from its one side and flange ( 35 ) from its other side, besides the bushes ( 3 a , 3 b ) are positioned against each other with its corrugated ends in such a way that the convexities of one ( 3 a ) of the cam sections are positioned against concavities of the other ( 3 b ), at a distance from each other, and further comprises spacer ( 37 ) between the flanges ( 35 ) of the bushes ( 3 a , 3 b ), so as to form the cam groove having a constant section and controlled for ensuring a permanent contact between the rollers ( 2 ) and the corresponding cam section ( 95 a or 95 b ).