Patent ID: 8210151
Filing Date: 2012-07-03
Classification: F01C,F02B,F02G

Abstract:
1. A positive displacement rotary-piston machine comprising: (a) a casing having an annular working chamber and an intake port and exhaust port, (b) first and second drive shafts coaxial with the annular surface defining the annular working chamber and provided with 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 first and second drive shafts, (d) an output shaft concentric with the first and second drive shafts and having a carrier, (e) crankshafts connected to the arms of the carrier of the output shaft and carrying planetary gears meshed with the stationary central gear, (f) connecting rods linking the arms of the first and second drive shafts and the crankshafts, characterized in that the output shaft has an offset portion carrying the carrier and a planetary gear, 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 an integer (i.e. n=1, 2, 3 . . . , a series of integers), the carrier is pivotally connected to the arms of the first and second drive shafts through the connecting rods, and the number of vanes mounted on each of the first and second drive shafts is n+1.