Yukio Aoyagi

Person

Ibaraki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Hydraulic drive system for construction machine
- Patent number 5,488,787
- Issue date Feb 6, 1996
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic drive system for construction machine
- Patent number 5,295,795
- Issue date Mar 22, 1994
- Hitachi Construction Machinery Co., Ltd.
- Tomohiko Yasuda
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic drive system with pressure compensting valve
- Patent number 5,277,027
- Issue date Jan 11, 1994
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic drive system for construction machine
- Patent number 5,174,114
- Issue date Dec 29, 1992
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic drive system for construction machines
- Patent number 5,056,312
- Issue date Oct 15, 1991
- Hitachi Construction Machinery Co., Ltd.
- Toichi Hirata
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Pump controlling apparatus for construction machine
- Patent number 5,048,293
- Issue date Sep 17, 1991
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic drive system
- Patent number 4,768,339
- Issue date Sep 6, 1988
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Load weight indicating system for load moving machine
- Patent number 4,627,013
- Issue date Dec 2, 1986
- Hitachi Construction Machinery Co., Ltd.
- Shuichi Ichiyama
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Method of and system for controlling hydraulic power system
- Patent number 4,606,313
- Issue date Aug 19, 1986
- Hitachi Construction Machinery Co., Ltd.
- Eiki Izumi
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Control system for hydraulic circuit means
- Patent number 4,587,808
- Issue date May 13, 1986
- Hitachi Construction Machinery Co., Ltd.
- Hiroshi Watanabe
- G05 - CONTROLLING REGULATING
Information Patent Grant
Control system for hydraulic circuit apparatus
- Patent number 4,586,330
- Issue date May 6, 1986
- Hitachi Construction Machinery Co., Ltd.
- Hiroshi Watanabe
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic power system
- Patent number 4,571,941
- Issue date Feb 25, 1986
- Hitachi Construction Machinery Co, Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Control system for hydraulic circuit apparatus
- Patent number 4,561,249
- Issue date Dec 31, 1985
- Hitachi, Ltd.
- Hiroshi Watanabe
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Hydraulic drive system having a plurality of prime movers
- Patent number 4,561,250
- Issue date Dec 31, 1985
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Flushing valve system in closed circuit hydrostatic power transmission
- Patent number 4,531,369
- Issue date Jul 30, 1985
- Hitachi Construction Machinery Co., Ltd.
- Eiki Izumi
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Control system for hydrostatic power transmission
- Patent number 4,528,813
- Issue date Jul 16, 1985
- Hitachi Construction Machinery Co., Ltd.
- Eiki Izumi
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Hydraulic drive system for single rod cylinder
- Patent number 4,520,626
- Issue date Jun 4, 1985
- Hitachi Construction Machinery Co., Ltd.
- Kichio Nakajima
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Circuit pressure control system for hydrostatic power transmission
- Patent number 4,510,750
- Issue date Apr 16, 1985
- Hitachi Construction Machinery Co., Ltd.
- Eiki Izumi
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Hydraulic power system
- Patent number 4,464,898
- Issue date Aug 14, 1984
- Hitachi Construction Machinery Co., Ltd.
- Yukio Aoyagi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Control method and control system for hydrostatic drive system
- Patent number 4,451,893
- Issue date May 29, 1984
- Hitachi Construction Machinery Co., Ltd.
- Eiki Izumi
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Control method of a system of internal combustion engine and hydrau...
- Patent number 4,395,199
- Issue date Jul 26, 1983
- Hitachi Construction Machinery Co., Ltd.
- Eiki Izumi
- B60 - VEHICLES IN GENERAL

Yukio Aoyagi

Person

Patents Grantslast 30 patents

Hydraulic drive system for construction machine

Hydraulic drive system for construction machine

Hydraulic drive system with pressure compensting valve

Hydraulic drive system for construction machine

Hydraulic drive system for construction machines

Pump controlling apparatus for construction machine

Hydraulic drive system

Load weight indicating system for load moving machine

Method of and system for controlling hydraulic power system

Control system for hydraulic circuit means

Control system for hydraulic circuit apparatus

Hydraulic power system

Control system for hydraulic circuit apparatus

Hydraulic drive system having a plurality of prime movers

Flushing valve system in closed circuit hydrostatic power transmission

Control system for hydrostatic power transmission

Hydraulic drive system for single rod cylinder

Circuit pressure control system for hydrostatic power transmission

Hydraulic power system

Control method and control system for hydrostatic drive system

Control method of a system of internal combustion engine and hydrau...