Rotor assembly for rotary power device

In a rotary power device adaptable for use as an engine, pump or compressor, said device comprising a rotor assembly having at least a pair of cylinders, a stator defining a side wall and end plates defining end walls which cooperate to form an interior for receiving said rotor assembly, a sinusidal cam track formed in said side wall extending about the circumference of said stator, said rotor assembly being carried by a drive shaft for rotation in said stator interior, said cylinders opening at each end of said stator for intermittent communication with ports formed in said stator end walls, a piston body having a piston head at each end slidably disposed in each of said cylinders for reciprocating movement therein, a piston pin disposed on each said piston extending normal to the axis of said piston for projection into said sinusoidal cam track to serve as a cam follower for reciprocating said pistons responsive to the rotation of said rotor, the improvement comprising:

• a. said rotor assembly consisting of first and second opposing cylindrical rotor sections, said first and second opposing rotor sections each defining an end face for contact with a respective one of said stator end walls and an inner surface facing said opposing rotor section, said first and second sections being movable with respect to one another in said shaft in a direction parallel to the axis of rotation of said rotator,
• b. an inwardly extending support leg being formed on said inner surface of said first and second rotor sections, said support leg defining an extended end for supporting said rotor sections on one another and for limiting the travel of said rotor sections towards one another;
• c. at least two through running cylinders opening at the end face and the inner surface of said first and second rotor sections, each of said cylinders in said first rotor section being aligned with a corresponding cylinder in said second rotor section when said rotor sections are assembled in said stator;
• and
• d. spring means disposed between said first and second rotor sections being normally compressed when said rotor sections are assembled in said stator for urging said first and second rotor sections apart;
• whereby contact is maintained between said end face of said first and second rotor sections and a respective end wall of said stator, and said rotor sections move inwardly against the urging of said spring means as components of said rotary power device expand due to heating, and move outwardly as said components contract due to cooling.