Patent ID: 7438543

Claim:
An oscillating slide machine comprising: (a) a housing; (b) at least one set of rotors comprising an inner rotor disposed on a drive shaft and an outer rotor pivotally mounted directly or indirectly to the housing; (c) a plurality of moving bars connecting the inner rotor to the outer rotor, each moving bar comprising a moving head having a front side and a rear side, a moving foot, and a moving head plate disposed on the rear side of the moving head so that the moving head plate tilts toward the moving foot in comparison to a connection line between a center point of a circle formed by the moving head and a center of the moving foot and changes over at a free end of the moving head plate approximately at a right angle to form a rear side slide-off cam and the moving head on the front side changes over by traveling down a moving head groove to the moving foot to form a front side slide-off cam; (d) a plurality of seating slots uniformly distributed circumferentially over the outer rotor, each seating slot receiving a moving head of a respective moving bar; (e) a plurality of moving flange holders, each moving flange holder being disposed on a front side of a respective seating slot; (f) a plurality of tilted moving contact surfaces, each tilted contact surface being disposed on a rear side of a respective seating slot; and (g) a plurality of moving guide slots provided in the inner rotor, each moving guide slot receiving a moving foot of a respective moving bar; wherein the moving guide slots are provided with front edge grooves and rear edge grooves of differing heights so that an intended diameter of a first circumference of a first connection of all front edge grooves is smaller than a diameter of a second circumference of a second connection of all rear edge grooves.