Patent ID: 8221104
Filing Date: 2012-07-17
Classification: F04C

Abstract:
1. A compressor comprising: a housing including a chamber in fluid communication with a suction plenum and a discharge plenum; a pair of rotors located in said chamber in meshing engagement with one another to compress a fluid from a suction pressure at said suction plenum to a discharge pressure at said discharge plenum; and a slide valve adjacent said pair of rotors including a passage having an axial portion that extends at least partially along an axial length of said slide valve, a first radial portion that extends between said axial portion and a sidewall of said slide valve to define a first opening in said sidewall, and a second radial portion that extends between said axial portion and an opposing sidewall of said slide valve to define a second opening in said opposing sidewall, wherein said passage is blocked by said housing to prevent fluid communication between said discharge plenum and said suction plenum along said passage when said slide valve is in a fully loaded position within said housing to prevent said fluid from flowing from said discharge plenum to said suction plenum, and wherein the first radial portion and the second radial portion are in fluid communication with each other, the first opening and the first radial portion having a same cross-sectional area, and the second opening and the second radial portion having a same cross-sectional area.