20130004353 | PARTITION AND PARTITION CHAMBER FOR ROTARY ENGINES - A device and method for selectively maintaining pressure in a toroidal cylinder having an internal wall and a piston moving in the toroidal cylinder, the device including at least one partition plate pivotally mounted in the internal wall for selective sealing engagement of the internal wall of the cylinder, whereby a selected portion of the cylinder between the partition plate and the piston is selectively maintained at high pressure. | 01-03-2013 |