Rotary expansible chamber devices – With wear surface treatment or integrally plated wear layer
Reexamination Certificate
2011-08-16
2011-08-16
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
With wear surface treatment or integrally plated wear layer
C418S077000, C418S133000, C418S152000
Reexamination Certificate
active
07997884
ABSTRACT:
An oil pump has: a base part having a working chamber; and a rotor provided rotatably in the working chamber. The base part is configured by a plurality of split bodies. At least one of the plurality of split bodies is made of aluminum alloy, and on which an opposed sliding surface made of a ceramic film is formed. The ceramic film of the opposed sliding surface has a hardness of approximately Hv 500 to 1100 and a surface roughness of approximately 2 to 8 micrometers, and contains α-alumina and zirconia.
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Konishi Tomoyoshi
Mio Takumi
Saito Toshiyuki
Suda Arata
Suzuki Masahiro
JTEKT Corporation
Nihon Parkerizing Co. Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Trieu Theresa
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