Sliding-blade vapor engine with vortex boiler

A sliding-blade fluid expansion engine comprising:

• a housing having an oval-shaped expander chamber with a peripheral side wall which is oval-shaped in cross section, parallel opposed facing flat end walls, and a cylindrical guide groove concentric with said peripheral side wall formed in each said end wall;
• a cylindrical expander rotor having a circular side wall, parallel opposed flat end walls, a concentric shaft extending outwardly from each said expander rotor end wall, and at least two mutually perpendicular slots extending radially through said expander rotor with a radial extending portion of each said slot extending through said expander rotor end walls, said expander rotor rotatably mounted by said shafts eccentrically in said expander chamber relative to the major axis of said expander chamber;
• at least two elongate rectangular expander blades, one slidably mounted in each of said slots extending slidably through said expander rotor in mutually perpendicular relation and each independently movable relative to the other in a radial direction, each said expander blade having a guide element extending from opposed sides and through said radial extending portion of each said slot outwardly from said expander rotor end walls and slidably received in a said cylindrical guide groove in said expander chamber end walls;
• said inner periphery of said oval-shaped side walls of said expander chamber in the plane of rotor rotation configured according to the equation:
• ##EQU2## where x and y represent vertical and horizontal coordinates of said expander chamber, h is equal to one-half of the length of said rotor blades and equal to one-half of the major axis of said oval-shaped inner periphery, and L is equal to the eccentrically offest distance between the center of said oval-shaped expander chamber and said guide grooves;
• upon rotation of said expander rotor said guide elements traveling in said cylindrical guide grooves causing said expander blades to extend and retract radially with their outer ends following the inner periphery of said oval-shaped side walls of said expander chamber with a constant clearance between the outer tip ends of said blades and said inner periphery of said expander chamber side walls;
• and
• working fluid inlet and outlet means formed in said expander chamber side wall configured to receive a working fluid tangential to the direction of rotation of said expander rotor, said working fluid expanding upon entry into said expander chamber to impart a force on said expander blades to cause rotation of said expander rotor and to discharge the working fluid tangential to the direction of rotation of said expander rotor.