Patent ID: 6343575
Filing Date: 2002-02-05
Classification: F01B,F02B

Abstract:
A positive displacement device having an intake and an exhaust, comprised of:a convex piston; a hollow cylinder having one closed end, the cylinder overlapping the piston; a means for defining the relative translation and rotation of the piston and the cylinder, such that the piston is generally fixed and the cylinder rotates and translates relative to the piston; and a chamber between the piston and the closed end of the cylinder, the volume of said chamber being varied by said relative translation and rotation of the piston and cylinder; and such rotation and translation accomplishing the functions of a rotary valve with respect to the intake and exhaust, such that the cylinder contains a recessed volume which serves as a transfer port, and the piston contains a recessed volume which serves as an intake port, such that the intake port, the transfer port, and the chamber are in periodic registry during the cylinder rotation to allow fluid to enter the chamber through the intake port and the transfer port, and the piston contains a recessed volume which serves as an exhaust port, such that the exhaust port, the transfer port, and the chamber are in periodic registry during the cylinder rotation to allow fluid to exit the chamber through the transfer port and the exhaust port.