Rotary piston compressor with rotary pistons arranged eccentrically one within the other

Claim 1

A ROTARY PISTON COMPRESSOR, ESPECIALLY FOR A REFRIGERATING MEDIUM, WHICH INCLUDES: OUTER AND INNER ROTARY PISTON MEANS ROTATABLY AND ECCENTRICALLY ARRANGED ONE WITHIN THE OTHER AND DRIVINGLY CONNECTED TO EACH OTHER, SAID INNER AND OUTER PISTON MEANS CONFINING WITH EACH OTHER CHAMBER MEANS VARYING IN VOLUME IN RESPONSE TO A ROTATION THEREOF FOR RECEIVING AND COMPRESSING A MEDIUM TO BE COMPRESSED, ONE OF SAID PISTON MEANS HAVING INLET MEANS FOR ADMITTING A MEDIUM TO BE COMPRESSED TO SAID CHAMBER MEANS, HOUSING MEANS HOUSING SAID OUTER AND INNER ROTARY PISTON MEANS AND HAVING AN INTAKE PORT COMMUNICATING WITH SAID INLET MEANS AND CONNECTABLE TO A SUPPLY OF A MEDIUM TO BE COMPRESSED, SAID HOUSING MEANS ALSO HAVING A DISCHARGE PORT FOR DISCHARGING THE COMPRESSED MEDIUM, SAID OUTER PISTON MEANS BEING OPEN AT ONE END FACE AND HAVING A SHAFT JOURNAL CONNECTED TO IS OTHER END FACE, BEARING MENS ARRANGED IN SPACED RELATIONSHIP TO EACH OTHER AND SUPPORTING SAID SHAFT JOURNAL AT SPACED PORTIONS THEREOF, DRIVING MOTOR MEANS HAVING A ROTOR ARRANGED BETWEEN SAID BEARING MEANS AND DRIVINGLY CONNECTED TO SAID SHAFT JOURNAL, ADDITIONAL BEARING MEANS CONNECTED TO SAID HOUSING MEANS AND SUBSTANTIALLY CENTRALLY ROTATABLY SUPPORTING SAID INNER ROTARY PISTON MEANS, AND CONDUIT MEANS EXTENDING AROUND SAID ADDITIONAL BEARING MEANS AND COMMUNICATING WITH SAID DISCHARGE PORT, SAID INNER ROTARY PISTON MEANS BEING PROVIDED WITH OUTLET MEAND OPERABLE IN RESPONSE TO A CERTAIN RELATIVE POSITION OF SAID INNER AND OUTER PISTON MEANS TO CONVEY COMPRESSED MEDIUM FROM SAID CHAMBER MEANS TO SAID CONDUIT MEANS AND THEREBY TO SAID DISCHARGE PORT.