Rotary expansible chamber devices – With wear surface treatment or integrally plated wear layer
Reexamination Certificate
2005-05-17
2005-05-17
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
With wear surface treatment or integrally plated wear layer
C418S201100, C418S152000
Reexamination Certificate
active
06893240
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 depsoited on the surface of the bores coacting with the rotors.
REFERENCES:
patent: 5364250 (1994-11-01), Aoki et al.
patent: 5672054 (1997-09-01), Cooper et al.
patent: 56075992 (1981-06-01), None
Bush James W.
Cooper Clark V.
DeBlois Paula R.
Drost Ronald T.
Du Hong
Carrier Corporation
Denion Thomas
Trieu Theresa
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