Patent ID: 7334514

Claim:
An actuation assemblies comprising; (a) A body having a vertical bore extending to three horizontal passageways; (b) Three pistons, each piston slidably positioned in a respective one of said passageways for reciprocating; (c) An output shaft rotatably positioned within said body; (d) A conversion-transmission means operatively associated with said pistons and said output shaft for converting movements between reciprocating movements of said pistons and a rotary movement of said output shaft, said conversion-transmission means comprises a roller attached to said output shaft, said roller has three, equally spanned, axial openings for converting movements, respected one of said openings is engaged with a rotatable bearing having an internal wall engaged with a rotatable pin, respected one of said pins is linked to respected one of said pistons by a piston rod, said conversion-transmission means also has at least a guide plate being vertically adjacent to said roller, said plate has a plurality of slots which are equally spanned for constraining and supporting said pins.