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1. (WO2002002949) SCREW MACHINE

Pub. No.:    WO/2002/002949    International Application No.:    PCT/US2000/034871
Publication Date: Jan 10, 2002 International Filing Date: Dec 21, 2000
IPC: B05D 3/12
F04C 18/08
F04C 18/16
Applicants: CARRIER CORPORATION
Inventors: BUSH, James, W.
COOPER, Clark, V.
DROST, Ronald, T.
DU, Hong
EATON, Harry, E.
KHALIFA, Hussein, E.
KUMAR, Keshava, B.
LIN, Reng, Rong
MC CLUSKEY, Philip, H.
DE BLOIS, Raymond
Title: SCREW MACHINE
Abstract:
A screw machine (10) has a rotor housing (12) defining overlapping bores (12-1,12-2). Female rotor (14) is located in bore (12-1) and male rotor (16) is located in bore (12-2). A wear resistant coating is deposited on the tips (14-1, 16-1) of the rotors. A conformable coating is deposited on the valleys (14-2, 16-2) of the rotors. A conformable coating is deposited on the surface of the bores coacting with the rotors.