Patent ID: 8152505
Filing Date: 2012-04-10
Classification: F01C,F04C

Abstract:
1. A rotary apparatus comprising: a static rotor housing including a cover having at least two ports; a vane assembly housed within the static rotor housing; and an output shaft in communication with the vane assembly and having a plurality of engagement arms extending upwardly from a flange of the output shaft; the vane assembly including a plurality of intersecting vanes, a portion of each engagement arm juxtaposed between a portion of the intersecting vanes so that the vane assembly and output shaft rotate together, the static rotor housing having an outer contour and an inner contour, the inner contour being defined by a conchoid of rhodonea, the conchoid of rhodonea being expressed in polar form as r=a+b sin(cΘ), where “r” is a radius of the inner contour, Θ is a polar angle of a curvature of the inner contour, “a” is a diameter of the inner contour, “b” is an eccentricity coefficient defining a rate of curvature of the inner contour, and “c” is an odd integer value at least equal to 3 in magnitude.