Patent ID: 8096288

Claim:
A supercharger having a longitudinal axis, comprising: a housing at least partially defining a chamber, the housing having a first end and a second end; at least one rotor disposed within the chamber; an inlet port proximate the first end of the housing and in fluid communication with the chamber; an outlet port proximate the second end of the housing and in fluid communication with the chamber, wherein at least a section of the outlet port is located at the same longitudinal position as a portion of the rotor and is configured to allow fluid to directly exit the chamber in a radial direction; and a relief chamber in fluid communication with the chamber, the relief chamber including a chamber end surface and a pair of oppositely disposed chamber side surfaces defining the entire width of the relief chamber, wherein the relief chamber has a depth in the axial direction that is equal to at least about 10% of the axial length of the rotor and is configured to allow fluid to exit the chamber in an axial direction, and wherein the chamber end surface is substantially curved from a front edge to a back edge and each of the chamber side surfaces is angled outwardly from the relief chamber.