Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5613519 | Operating valve assembly with pressure compensation valve | — | 1997-03-25 |
| 5572919 | Apparatus for controlling pressure in a cylinder chamber of a hydraulic pump-motor | — | 1996-11-12 |
| 5481872 | Hydraulic circuit for operating plural actuators and its pressure compensating valve and maximum load pressure detector | Tadao Karakama, Teruo Akiyama, Kouji Yamashita | 1996-01-09 |
| 5477678 | Hydraulic circuit system | Kiyoshi Shirai, Terruo Akiyama, Shigeru Shinohara, Takahide Takiguchi | 1995-12-26 |
| 5398507 | Hydraulic circuit system | Teruo Akiyama, Kiyoshi Shirai, Koji Yamashita, Shin-ichi Shinozaki | 1995-03-21 |
| 5372060 | Hydraulic valve assembly | Jun Maruyama, Koji Yamashita | 1994-12-13 |
| 5279122 | Hydraulic circuit apparatus for supplying fluid under pressure into hydraulic cylinders for work implement | Kiyoshi Shirai, Teruo Akiyama, Shigeru Shinohara, Takahide Takiguchi | 1994-01-18 |
| 5273069 | Operation valve with pressure compensation valve | Teruo Akiyama, Kiyoshi Shirai, Koji Yamashita, Shinichi Shinozaki | 1993-12-28 |
| 5271227 | Hydraulic apparatus with pressure compensating valves | Teruo Akiyama, Kiyoshi Shirai, Koji Yamashita, Shinichi Shinozaki | 1993-12-21 |
| 5255705 | Hydraulic pressure control system | Kazuo Uehara, Tadao Karakama, Sadao Nunotani, Masayuki Tanaami | 1993-10-26 |
| 5253672 | Hydraulic pressure control system | Kazuo Uehara, Tadao Karakama, Sadao Nunotani, Masayuki Tanaami | 1993-10-19 |
| 5234028 | Variable pressure control valve | Toshiro Takano, Sadao Nunotani | 1993-08-10 |
| 5218897 | Hydraulic circuit apparatus for operating work-implement actuating cylinders | Kiyoshi Shirai, Terruo Akiyama, Shigeru Shinohara, Takahide Takiguchi | 1993-06-15 |
| 5212950 | Hydraulic circuit with pilot pressure controlled bypass | Kiyoshi Shirai, Teruo Akiyama, Shigeru Shinohara, Takahide Takiguchi | 1993-05-25 |
| 5209063 | Hydraulic circuit utilizing a compensator pressure selecting value | Kiyoshi Shirai, Shigeru Shinohara, Teruo Akiyama, Takahide Takiguchi | 1993-05-11 |
| 5188147 | Pressure compensating type hydraulic valve | Kiyoshi Shirai, Kazuo Uehara, Koichi Morita, Takahide Takiguchi | 1993-02-23 |
| 5163477 | Electrohydraulic proportional control valve | Toshiro Takano, Sadao Nunotani | 1992-11-17 |
| 5136930 | Apparatus for supplying pressure oil to hydraulic cylinders employed in working machines | Tadao Karakama, Hiroshi Endo, Sadao Nunotani, Toshiro Takano | 1992-08-11 |
| 5076144 | Poppet valve device | Tadao Karakama, Sadao Nunotani, Toshiro Takano | 1991-12-31 |
| 5056415 | Pilot operated control valve system performing a support function | Tadao Karakama, Yosuke Oda | 1991-10-15 |
| 5046400 | Control valve system | Tadao Karakama, Yosuke Oda | 1991-09-10 |
| 5040565 | Pilot operated control valve system | Tadao Karakama, Yosuke Oda | 1991-08-20 |
| 4984603 | Flow control valve assembly | Tadao Karakama, Toshiro Takano, Sadao Nunotani | 1991-01-15 |
| 4646622 | Hydraulic control apparatus | Sadao Nunotani, Tatsumi Tada, Kazuo Uehara, Shuki Akushicki | 1987-03-03 |
| 4599050 | Device for controlling displacement of variable displacement hydraulic pump | Koichi Morita | 1986-07-08 |