Patent ID: 7828532

Claim:
A rotary-vane machine, comprising: a stationary tubular housing having a pump lubricated section including an oil carter, and an oil-free section, having two pairs of ports through which a working medium can enter or exit; a housing cover fixedly attachable to the pump lubricated housing section; a central boss member associated with the housing, the housing comprising the stationary tubular housing and the housing cover; a sun gear fixedly attached to said central boss member; a united or separated central bearing and oil transferring member, which are mounted on said central boss member or on a hub of said sun gear; a cover disc fixedly attachable to the end of said oil-free housing section, or integral therewith, adapted to define, together with said central boss member, the longitudinal axis of said tubular housing; a tubular rotor to the inside of which are fixedly attachable, or integrally with, two tapering vanes rotatable, together with said tubular rotor, at a uniform speed, said tubular rotor including four ports through which a working medium can enter or exit; a first rotor end plate fixedly attached to said tubular rotor or to its tapering vanes; a drive shaft fixedly attached to, or integral with, said first end plate, supported by at least one bearing located in said cover disc, and adapted to carry an electrical motor rotor or to be connected with an external source of rotary power; a second rotor end plate fixedly attached to said tubular rotor or to its tapering vanes and a support ring mounted on said central boss member or on the hub of the sun gear via said central bearing, said second rotor end plate and said support ring being joined together via at least two projections; a hollow main shaft oscillatably mounted in main shaft bearings seated in said first end plate and said second end plate, and being concentric with said tubular rotor, said hollow main shaft having a solid end of a reduced diameter; two substantially flat vanes fixedly attached to opposite sides of said hollow shaft by rods, and defining with said hollow shaft, said tubular rotor, said tapering vanes and said first and second end plates, four chambers; at least one shaft unit for rotating in crank shaft bearings mounted in said second end plate and said support ring respectively, each shaft unit having attached thereto or integral therewith, an eccentric or a crank section, and a planet gear; at least one connecting rod having a big end and a small end, the big end being associated with said eccentrics and the small end being associated via pivots with a rocker arm fixedly attached to said reduced hollow main shaft end, wherein rotation of said drive shaft at a uniform speed causes said tubular rotor, including said tapering vanes, to be rotated at the same uniform speed, while an oscillatory motion is superposed on said hollow main shaft and said tapering vanes, for causing the volume of said four chambers to successively vary between a minimum and a maximum.