Rotary machine with lenticular rotor and a circular guide member therefor

A rotary machine which comprises:

• a casing including a chamber defined by axially spaced apart end walls and a single lobe annular wall within an inner surface having at least in part a cardioidal configuration;
• a shaft extending into said chamber, rotatably mounted in at least one of said end walls and comprising, within said chamber, an acircular portion having mutually parallel and linear opposite edges, said shaft having a predetermined diameter;
• a two-lobe lenticular rotor with symmetrically opposed apices and disposed within said chamber for eccentric rotation therein with said apices in sliding sealing contact with said inner surface of said annular wall, said rotor being provided with a first elongated slot having opposite sides within which said acircular portion of said shaft is slidingly disposed for driving reciprocating movement therewithin on rotation of sais shaft and, in an end surface thereof, and said rotor being provided with a second elongated slot having parallel opposite sides and perpendicular to said first elongated slot;
• a fixed circular guide member on the inner face of a said end wall of said casing and extending into said second elongated slot within said rotor so that, on rotation of said rotor within said chamber, said opposite sides of said second elongated slot move tangentially around said guide member in response to relative reciprocating movement of said guide member along said second elongated slot with at least a semi-circular part of said circular guide member remaining within said second elongated slot at all times during such rotation of said rotor, said guide member having a predetermined diameter larger than said shaft, and located with its centre offset relative to the centre of said shaft, the relative diameters of said shaft and said guide members being such that said shaft lies within the circumference of said guide member, and,
• mutually spaced inlet and outlet ports opening into said chamber for the supply and discharge respectively of a fluid material.