Patent ID: 6945217

Claim:
An improved rotary machine which includes: a housing having formed therein a generally elongate cavity, said cavity being formed by a pair of adjoining, partially overlapping cylindrical bores, each said bore separated from the adjoining bore by a pair of non-joining partition walls; a pair of non-cylindrical rotors arranged in said pair of adjoining bores, each said rotor having a curved perimeter surface formed between said pair of parallel side surfaces, said perimeter surface formed of a plurality of curved portions, each abutted by a pair of said curved portions, contiguous therewith and mutually tangential thereto, wherein each said rotor is disposed in one of said bores for synchronized, non-touching and same-directional rotation with the other said rotors; a pair of rotor shafts associated with said pair of rotors, each said rotor shaft extending through one of said bores, and mounted transversely to each said rotor so as to provide rotation thereof in said bore; a gear assembly and a driver associated with said rotor shafts, said assembly and said driver, cooperating to provide synchronized same directional rotation of said rotor shafts; at least one pair of intake gas ports formed in said housing and communicating with said elongate cavity thereof, for permitting selectable intake of working gases; at least one pair of exhaust gas ports formed in said housing and communicating with said elongate cavity thereof, for permitting selectable exhausting of working gases, wherein, introduction of a working gas into interactive association with said rotors causes rotation of said pair of rotors and thus also of said driver; and shutter apparatus mounted so as to normally close at least one predetermined gas port so as to prevent gas flow therethrough.