Inventor
MURAYAMA AKIRA
JP35 patents
⚠️ This page may combine multiple inventors who share the name “MURAYAMA AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
26 patentsUS4774816AOct 4, 1988
Air conditioner or refrigerating plant incorporating scroll compressor
HITACHI LTD117 citations96
US4669962AJun 2, 1987
Scroll compressor with pressure differential maintained for supplying oil
HITACHI LTD81 citations96
US4596521AJun 24, 1986
Scroll fluid apparatus
HITACHI LTD61 citations96
US4560330ADec 24, 1985
Scroll device with suction chamber pressure relief
HITACHI LTD60 citations96
US4818195AApr 4, 1989
Scroll compressor with valved port for each compression chamber
HITACHI LTD125 citations95
US4382370AMay 10, 1983
Refrigerating system using scroll type compressor
HITACHI LTD116 citations95
US5211031AMay 18, 1993
Scroll type compressor and refrigeration cycle using the same
HITACHI LTD85 citations92
US5017108AMay 21, 1991
Scroll compressor with first and second oil pumps in series
HITACHI LTD48 citations92
US4989414AFeb 5, 1991
Capacity-controllable air conditioner
HITACHI LTD50 citations92
US4743181AMay 10, 1988
Scroll-type fluid machine with seal to aid lubrication
HITACHI LTD41 citations92
US4696629ASep 29, 1987
Hermetic scroll compressor with welded casing section
HITACHI LTD33 citations92
US4545747AOct 8, 1985
Scroll-type compressor
HITACHI LTD44 citations92
US4714415ADec 22, 1987
Scroll compressor with closed compression spaces having valves to reduce starting torque
HITACHI LTD28 citations91
US4371319AFeb 1, 1983
Hermetic motor compressor
HITACHI LTD46 citations91
US4755114AJul 5, 1988
Sealed type scroll compressor with wire mesh oil separating member
HITACHI LTD31 citations88
US4557675ADec 10, 1985
Scroll-type fluid machine with back pressure chamber biasing an orbiting scroll member
HITACHI LTD22 citations82
US4551082ANov 5, 1985
Bearing device of sealed type scroll compressor
HITACHI LTD22 citations82
US4518324AMay 21, 1985
Sealed type electrically operated compressor
HITACHI LTD26 citations82
US4473343ASep 25, 1984
Bearing device for scroll-type compressor
HITACHI LTD14 citations74
US4352642AOct 5, 1982
Hermetic motor-compressor
HITACHI LTD18 citations74
US4904170AFeb 27, 1990
Scroll-type fluid machine with different terminal end wrap angles
HITACHI LTD9 citations73
US4810176AMar 7, 1989
Anti-rotation mechanism for use with orbiting scroll member of scroll compressor
HITACHI LTD19 citations73
US4749344AJun 7, 1988
Oil feeding device for scroll fluid apparatus
HITACHI LTD13 citations73
US4579512AApr 1, 1986
Scroll-type fluid machine with radial clearance between wraps
HITACHI LTD13 citations73
US4690625ASep 1, 1987
Scroll-type fluid machine with configured wrap edges and grooves
HITACHI LTD13 citations72
US4730997AMar 15, 1988
Hermetic scroll compressor having concave spaces communicating with a delivery port
HITACHI LTD6 citations63
RENESAS ELECTRONICS CORP
3 patentsUS10481185B2Nov 19, 2019
Semiconductor device, semiconductor system, and control method of semiconductor device to monitor a power supply voltage
RENESAS ELECTRONICS CORP3 citations68
US10884035B2Jan 5, 2021
Semiconductor device, semiconductor system, and control method of semiconductor device
RENESAS ELECTRONICS CORP0 citations58
US10288493B2May 14, 2019
Semiconductor integrated circuit and electronic control unit
RENESAS ELECTRONICS CORP0 citations41