Patent ID: 8511277

Claim:
A positive displacement rotary-piston machine comprising: (a) a casing having an annular working chamber and intake and exhaust ports, (b) first and second drive shafts coaxial with the annular surface defining the working chamber and provided with rotary pistons on one end thereof and with arms on the other end thereof, (c) a stationary central gear coaxial with the surface defining the working chamber and with the drive shafts, (d) an output shaft concentric with the drive shafts and having an offset portion carrying a carrier and a planetary gear, (e) the planetary gear being in mesh with the stationary central gear on the internal teeth thereof with a gear ratio i=n/(n+1), where n is a positive integer (i.e. n=1, 2, 3, 4, 5 . . . ), (f) the carrier being pivotally connected to the arms of both drive shafts through the connecting rods, and (g) the number of the rotary pistons mounted on each drive shaft being n+1, characterized in that (h) the annular working chamber of the casing has intake ports and exhaust ports and exit channels and entrance channels to pass overflow content(s) carried out beyond the annular working chamber, (i) the intake ports, the exit channels, the entrance channels, and the exhaust ports being sequentially and contiguously connected to the annular working chamber of the casing in the same direction as the rotary pistons move, (j) the intake ports and the exhaust ports as well as the exit channels and the entrance channels being arranged on each side of the site where the sides of the rotary pistons close the respective intake and exhaust ports and the respective exit and entrance channels, (k) and the sides of the rotary pistons in themselves having an angular width sufficient to simultaneously shutdown the exit channel and entrance channel.