Akira Tatsumi

Person

Ibaraki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Control device for hydraulically propelled work vehicle
- Patent number 5,638,677
- Issue date Jun 17, 1997
- Hitachi Construction Machinery Co., Ltd.
- Junichi Hosono
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Hydraulic control system for construction machines
- Patent number 5,479,778
- Issue date Jan 2, 1996
- Hitachi Construction Machinery Co., Ltd.
- Tsukasa Toyooka
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Apparatus for controlling revolution speed of prime mover for hydra...
- Patent number 5,477,679
- Issue date Dec 26, 1995
- Hitachi Construction Machinery Co., Ltd.
- Akira Tatsumi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic control apparatus for hydraulic construction machine
- Patent number 5,307,631
- Issue date May 3, 1994
- Hitachi Construction Machinery Co., Ltd.
- Akira Tatsumi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Engine revolution speed control device for a hydraulically driven v...
- Patent number 5,277,269
- Issue date Jan 11, 1994
- Hitachi Construction Machinery Co., Ltd.
- Kazuhiro Ichimura
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Hydraulic drive system for construction machine
- Patent number 5,155,996
- Issue date Oct 20, 1992
- Hitachi Construction Machinery Co., Ltd.
- Akira Tatsumi
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Engine remote control system
- Patent number 5,036,817
- Issue date Aug 6, 1991
- Hitachi Construction Machinery Co., Ltd.
- Osamu Tomikawa
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Apparatus for controlling rotational speed of prime mover of constr...
- Patent number 4,955,344
- Issue date Sep 11, 1990
- Hitachi Construction Machinery Co., Ltd.
- Akira Tatsumi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Drive control system for hydraulic construction machine
- Patent number 4,942,737
- Issue date Jul 24, 1990
- Hitachi Construction Machinery Co., Ltd.
- Akira Tatsumi
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Control system of hydraulic construction machinery
- Patent number 4,726,186
- Issue date Feb 23, 1988
- Hitachi, Construction Machinery Co.
- Akira Tatsumi
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Control system for hydraulically-operated construction machinery
- Patent number 4,697,418
- Issue date Oct 6, 1987
- Hitachi Construction Machinery Co., Ltd.
- Nobuya Okabe
- B60 - VEHICLES IN GENERAL

Akira Tatsumi

Person

Patents Grantslast 30 patents

Control device for hydraulically propelled work vehicle

Hydraulic control system for construction machines

Apparatus for controlling revolution speed of prime mover for hydra...

Hydraulic control apparatus for hydraulic construction machine

Engine revolution speed control device for a hydraulically driven v...

Hydraulic drive system for construction machine

Engine remote control system

Apparatus for controlling rotational speed of prime mover of constr...

Drive control system for hydraulic construction machine

Control system of hydraulic construction machinery

Control system for hydraulically-operated construction machinery