Patent ID: 6174151
Filing Date: 2001-01-16
Classification: F01C,Y10T

Abstract:
A rotary, chambered, fluid energy-transfer device comprising:(a) a housing comprising:(1) a housing cylindrical portion having a bore formed therein;(2) a housing end plate having:a) an inlet passage;b) an outlet passage; andc) a hub extending therefrom;(b) an outer rotor with a female gear profile rotating in said bore of said housing cylindrical portion and comprising:(1) a radial portion;(2) a female gear profile formed in said radial portion;(3) a first end covering said female gear profile; and(4) a second end skirting said female gear profile;(c) an inner rotor with:(1) a male gear profile in operative engagement with said outer rotor;(2) a central bore portion by which said inner rotor is located for rotation about said hub; and(3) said hub setting the rotational axis of said inner rotor;(d) said outer rotor having a coaxial hub extending normally from said outer rotor with said coaxial hub being mounted in said housing with a bearing assembly comprising a first rolling element bearing, said bearing assembly:(1) setting at least one of:a) a rotational axis of said outer rotor; andb) an axial position of said outer rotor; and(2) maintaining a fixed-gap clearance of said outer rotor with at least one surface ofa) said housing; andb) said inner rotor; and(e) a second rolling element bearing located between said housing end plate and said inner rotor and maintaining a minimum fixed-gap clearance of said inner rotor with said housing end plate.