Rotary expansible chamber devices – With wear surface treatment or integrally plated wear layer
Reexamination Certificate
2005-04-26
2005-04-26
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
With wear surface treatment or integrally plated wear layer
C418S179000, C418S201100, C148S230000, C148S232000
Reexamination Certificate
active
06884049
ABSTRACT:
A screw compressor of which a female rotor is driven by a motor, and of which a male rotor is driven by the female rotor. The male or female rotor is composed of a member which is made of cast iron and is subjected to surface hardening treatment or heat treatment including quenching. The surface hardening treatment may include sulphonitriding or nitiriding treatment. In the case of subjecting the cast iron to the heat treatment, austemper treatment is applied.
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Hida Takeshi
Kameya Hirotaka
Nozawa Shigekazu
Ohsumimoto Hiroki
Urashin Masayuki
Antonelli Terry Stout & Kraus LLP
Hitachi , Ltd.
Trieu Theresa
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