Patent ID: 6139256
Filing Date: 2000-10-31
Classification: F16J,Y10T

Abstract:
A gas compressor comprising:a housing defining a cavity, said housing having an inlet end portion and an outlet end portion in communication with said cavity;a shaft positioned within said housing and extending through said cavity, said shaft having an outer profile;a sealing arrangement positioned within at least one of said inlet end portion and said outlet end portion; anda centering device defining a generally cylindrical sleeve positioned about said shaft and within said sealing arrangement, said generally cylindrical sleeve having a first end and a second end, an inner surface and an outer surface defined between said first end and said second end, a first inner protrusion being axially spaced from said first end a preestablished distance and extending radially inward from said outer surface, a second inner protrusion axially spaced from said second end a preestablished distance and extending radially inward from said outer surface, a first outer protrusion axially spaced from said first end a preestablished distance and extending radially outward from said inner surface, said first outer protrusion being between said first end and said first inner protrusion, a second outer protrusion axially spaced from said second end a preestablished distance and extending radially outward from said inner surface, said second outer protrusion being between said first inner protrusion and said second inner protrusion, said first inner protrusion and said second inner protrusion being in contacting relationship with said outer profile of said shaft, said first outer protrusion and said second outer protrusion being in contacting relationship with said sealing arrangement, and said first outer protrusion being cantilevered about said outer profile of said shaft and said second outer protrusion being supported about said outer profile by said first inner protrusion and said second inner protrusion.