Patent ID: 6250278
Filing Date: 2001-06-26
Classification: F01C,F04C

Abstract:
A 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 being separated from an adjoining bore by a pair of non-joining partition walls, and each said bore having a geometric center;a pair of cylindrical rotors arranged in said pair of adjoining bores, each said rotor being disposed in one of said bores for synchronized, non-touching and same-directional rotation with the other of said pair of rotors about a rotation axis spaced from said geometric center by a predetermined eccentricity, wherein each said cavity is bounded by a pair of parallel wall surfaces transverse to said rotation axis;at least a pair of gas ports provided in communication with each said bore, for permitting selectable intake and exhaust of working gases, wherein a first of said gas ports is arranged at a first radius from said geometric center and a second of said gas ports is arranged at a second radius from said geometric center, wherein said second radius has a magnitude smaller than that of said first radius, and wherein each said rotor is operative to rotate within one of said bores so as to periodically cover and uncover said first port, thereby to periodically prevent and enable a flow therethrough of a working gas;a pair of rotor shafts associated with each said pair of cylindrical rotors, each said rotor shaft extending through a single bore of all of said housing cavities, and mounted transversely to each said rotor so as to provide eccentric rotation thereof in said bore; anda 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,wherein, introduction of a working gas into interactive association with said rotors causes rotation of said pairs of rotors in said machines and thus also of said driver,and wherein each said rotor has a pair of flat, parallel surfaces disposed in dynamic, non-touching, sealing relation with said pair of parallel wall surfaces of each said cavity, and each said rotor has formed therein a throughflow portion which is formed so as to be brought periodically into communicative association with the interior of said cavity and with said second gas port, so as to facilitate gas communication therebetween.