Patent ID: 7909590

Claim:
A reciprocating component-free kinematic motion apparatus, to transform pressure variations of a fluid operating in cyclically variable volume toroidal chambers into a mechanical work on a rotary axis of said apparatus, said apparatus comprising a cylinder, rotary pistons in said cylinder, each said rotary piston having a circular sector cross-section, a piston wall, a piston axis, two piston sides and a piston front face, between two adjoining said piston sides of each said pair of said piston being defined a cyclically variable volume circular sector cross-section chamber, said cylinder including a coaxial liner, thereon a plurality of piston prismatic sealing elements slide, said sealing elements being centrifugally urged against an inner wall of said liner, said prismatic sealing elements being optionally tightly resiliently coupled, and being engaged in cavities formed on each said piston wall, said pistons being delimited by two front disc elements, including elongated slots therethrough said axes of said pistons pass, to allow said pistons to be mutually driven toward one another and away from one another to in turn cause a volume variation of each said chamber, said disc elements comprising sealing elements arranged between contact surfaces of said disc elements and said piston front faces, said disc sealing elements including a plurality of prismatic elements centrifugally urged by wedge urging masses, said axes of said pistons being coupled to a connecting rod leverage, the connecting rods of which pass through bearings rolling on an inner wall of a cam, while deforming an articulated polygon including said connecting rods thereby causing a rotary speed of said pistons to cyclically change, wherein said bearings axially support pin elements, each said pin element being coupled to a said piston and to a first and second connecting rod being pivoted to a crank element of said apparatus.