Patent ID: 8794943

Claim:
A rotary apparatus, comprising: a rotor located within a stator, said rotor and said stator defining an interior space therebetween; a vane slidingly engaged in a rotor vane slot of said rotor, said vane separating said interior space into a rotationally trailing chamber and a rotationally leading chamber; a first passage through said vane, said first passage comprising a first exit port into said rotationally trailing chamber, said first exit port comprising an opening on a rotationally trailing side of said vane; and a second exit port to said rotationally trailing chamber, said second exit port comprising an opening on at least one of: said rotationally trailing side of said vane; and a bottom edge of a radial extension from a top of said vane, wherein said first exit port and said second exit port connect to any of: said first passage; and said first passage and a second passage through said vane, respectively.