Patent Number: 6,167,771

Title: Clearance distribution to reduce the leakage area

Abstract: Zero clearance screw rotor profiles are modified by determining clearance requirements at spaced points on the profiles and varying the clearance distribution between adjacent points using a non-linear distribution. Additionally, when the clearances are put in the rotors, zero clearance is maintained between the rotors in the contact band which is maintained near the pitch circle.

Inventors: Kumar; Keshava B. (South Windsor, CT), Bush; James W. (Skaneateles, NY)

Assignee: Carrier Corporation

International Classification: F04C 18/08 (20060101); F16H 055/17 (); F16H 055/22 ()

Expiration Date: 01/02/2018