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Toshiyuki Maeda
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last 30 patents
Information
Patent Grant
Non-lubricated rotary pump with discharge through end heads
Patent number
4,315,719
Issue date
Feb 16, 1982
Nippon Piston Ring Co., Ltd.
Hiroshi Sakamaki
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Rotary vane pump with pairs of end inlet or outlet ports
Patent number
4,286,933
Issue date
Sep 1, 1981
Toyota Jidosha Kogyo Kabushiki Kaisha
Hiroshi Sakamaki
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Rotary pump with carbon vanes and an aluminum cylindrical sleeve in...
Patent number
4,276,007
Issue date
Jun 30, 1981
Toyota Jidosha Kogyo Kabushiki Kaisha
Hiroshi Sakamaki
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Rotary vane pump with inlet and discharge ports in end sealing plates
Patent number
4,274,817
Issue date
Jun 23, 1981
Toyota Jidosha Kogyo Kabushiki Kaisha
Hiroshi Sakamaki
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Rotary fluid pump or compressor
Patent number
4,198,195
Issue date
Apr 15, 1980
Nippon Piston Ring Co., Ltd.
Hiroshi Sakamaki
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Vane type rotary fluid pumps or compressors
Patent number
4,163,635
Issue date
Aug 7, 1979
Nippon Piston Ring Kabushiki Kaisha
Hiroshi Sakamaki
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES