Inventor
HATA HIROAKI
JP31 patents
⚠️ This page may combine multiple inventors who share the name “HATA HIROAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
26 patentsUS6152714ANov 28, 2000
Displacement type fluid machine having rotation suppression of an orbiting displacer
HITACHI LTD57 citations96
US6258293B1Jul 10, 2001
Refrigeration cycle
HITACHI LTD35 citations95
US5964581AOct 12, 1999
Refrigerant compressor
HITACHI LTD53 citations95
US5711165AJan 27, 1998
Refrigerating apparatus and refrigerant compressor
HITACHI LTD47 citations95
US4726738AFeb 23, 1988
Motor-driven compressor provided with torque control device
HITACHI LTD61 citations94
US6029459AFeb 29, 2000
Refrigeration cycle
HITACHI LTD28 citations92
US5553465ASep 10, 1996
Refrigeration apparatus containing lubricant composition
HITACHI LTD24 citations92
US5417872AMay 23, 1995
Lubricant composition, refrigeration apparatus containing same and process for operating the apparatus
HITACHI LTD28 citations92
US4992715AFeb 12, 1991
Torque control apparatus for rotating motor machine
HITACHI LTD50 citations92
US6352418B1Mar 5, 2002
Displacement type fluid machine
HITACHI LTD27 citations91
US4915554AApr 10, 1990
Hermetic rotary compressor with balancing weights
HITACHI LTD38 citations91
US5230616AJul 27, 1993
Rotary compressor with shaft balancers
HITACHI LTD51 citations90
US4736143AApr 5, 1988
Torque control apparatus for rotary machine
HITACHI LTD41 citations90
US5314318AMay 24, 1994
Horizontal multi-cylinder rotary compressor
HITACHI LTD45 citations87
US5445753AAug 29, 1995
Lubricant for refrigeration compressors
HITACHI LTD16 citations81
US6217303B1Apr 17, 2001
Displacement fluid machine
HITACHI LTD9 citations73
US6099279AAug 8, 2000
Displacement fluid machine
HITACHI LTD14 citations73
US5494423AFeb 27, 1996
Rotary compressor and blade tip structure
HITACHI LTD12 citations72
US5540061AJul 30, 1996
Refrigerator
HITACHI LTD16 citations71
US6332763B1Dec 25, 2001
Displacement type fluid machine having an orbiting displacer forming a plurality of spaces
HITACHI LTD3 citations63
US6164941ADec 26, 2000
Displacement type fluid machine having an orbiting displacer forming a plurality of spaces
HITACHI LTD4 citations63
US6406279B2Jun 18, 2002
Displacement type fluid machine
HITACHI LTD3 citations62
US6179593B1Jan 30, 2001
Displacement fluid machine
HITACHI LTD6 citations62
US6332764B1Dec 25, 2001
Displacement type fluid machine having an orbiting displacer forming a plurality of spaces and method for manufacturing same
HITACHI LTD0 citations52
US6183228B1Feb 6, 2001
Displacement type fluid machine
HITACHI LTD1 citations52
US6213743B1Apr 10, 2001
Displacement type fluid machine
HITACHI LTD1 citations51