Patent ID: 6601547
Filing Date: 2003-08-05
Classification: F02B,F04B

Abstract:
An axial piston rotary power device comprising a stator portion and a rotor portion, the rotor portion comprising a rotatable shaft extending along an axis of the device,wherein the stator portion comprises: an external stator portion defining a generally cylindrical interior; the external stator portion comprising a back plate portion forming one of two ends of the generally cylindrical interior, a front plate portion forming the second end of the generally cylindrical interior, the front plate having a central throughhole within which the rotatable shaft is journaled; a cylindrical internal stator portion projecting from the back plate portion into the cylindrical interior along the axis of the device so as to define an annular space extending between the internal and external stator portions, the internal stator portion having a plurality of passageways formed therein, each of the passageways comprising a channel parallel to the axis, each of the channels communicating with at least one respective radial port formed in the internal stator at a respective selected axial position, at least one of the passageways comprising an inlet passageway, at least one of the passageways comprising an exhaust passageway; and an axially undulating guide track surface; and wherein the rotor portion further comprises: a cylindrical block fixedly attached to the shaft, the block rotatable within the annular space between the internal stator portion and the guide track surface, the block comprising a central cylindrical bore for receiving the internal stator, the block further comprising a selected number of working cylinders parallel to the axis of the device, each of the working cylinders spaced apart from the axis of the device by a single selected radial distance, each of the working cylinders having a radially inwardly directed end opening adjacent each of the two ends thereof, one of the end openings of each cylinder communicating with the central cylindrical bore at a first of the selected axial positions, the second of the end openings of each cylinder communicating with the central cylindrical bore at a second of the selected axial positions; each of the working cylinders further comprising a respective axial cam follower slot extending outwardly through an outer wall of the cylindrical block; the selected number of pistons, each piston slidably received in a respective one of the selected number of working cylinders; the selected number of pins, each of the pins extending through a respective cam follower slot, each of the pins connecting a respective piston to a respective cam follower, each of the cam followers engaging the guide track surface.