公开(公告)号：US5140815A

公开(公告)日：1992-08-25

申请号：US427126

申请日：1989-10-23

申请人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

发明人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

IPC分类号： F15B13/04 ,  F16K15/18

CPC分类号： F15B13/0405 ,  F16K15/18

摘要： A hydraulic actuator is driven by hydraulic fluid discharged from a hydraulic pump, for controlling driving of the actuator. A valve has a meter-in circuit for introducing the hydraulic fluid discharged from the hydraulic pump into the actuator. The valve also has a meter-out circuit for returning fluid from the actuator, into a tank. The meter-out circuit is provided with a main valve for controlling the return fluid from the actuator, and a pilot circuit including a variable restrictor. When the main valve is closed, the pilot circuit is closed, and when the main valve is open, its degree of opening varies depending upon an amount of restriction of the variable restrictor. A controller varies the amount of restriction of the variable restrictor valve in accordance with the driving pressure of the actuator.

摘要翻译： PCT No.PCT / JP89 / 00184 Sec。 371日期：1989年10月23日 102（e）日期1989年10月23日PCT提交1989年2月23日PCT公布。 第WO89 / 08213号公报。 日期1989年9月8日。液压致动器由从液压泵排出的液压流体驱动，用于控制致动器的驱动。 阀具有用于将从液压泵排出的液压流体引入致动器的计量回路。 阀还具有用于将流体从致动器返回到罐中的出口回路。 出口电路设置有用于控制来自致动器的返回流体的主阀和包括可变节流器的先导电路。 当主阀关闭时，先导电路关闭，当主阀打开时，其开度根据可变节流器的限制量而变化。 控制器根据致动器的驱动压力改变可变节流阀的限制量。

公开(公告)号：US4942900A

公开(公告)日：1990-07-24

申请号：US412491

申请日：1989-09-26

申请人： Yusaku Nozawa ,  Kazumasa Yuasa ,  Wataru Ootu ,  Kinya Takahashi

发明人： Yusaku Nozawa ,  Kazumasa Yuasa ,  Wataru Ootu ,  Kinya Takahashi

IPC分类号： F16K17/04 ,  F15B11/00 ,  F16K17/10 ,  F16K31/363 ,  F16K31/383

CPC分类号： F16K31/3835 ,  F16K17/105 ,  F16K31/363 ,  Y10T137/7764 ,  Y10T137/7765 ,  Y10T137/7769

摘要： A pressure control valve has a main valve element of seat type slidably accommodated in a valve case for controlling communication between inlet and outlet sections of the valve case by movement of the main valve element, a control chamber defined within the valve case and between the valve case and an end face of the main valve remote from the outlet section for biasing the main valve element in a valve closing direction, and a variable restriction variable in its opening in response to the movement of the main valve element for communication between the control chamber and the inlet section of the valve case. There are provided first and second pilot lines for communication between the control chamber and the outlet section of the valve case, first and second pilot valve elements arranged respectively in the first and second pilot lines, a first valve drive unit operative in response to the pressure of the inlet section of the valve case for opening the first pilot valve element when the pressure reaches a first predetermined value, and a second valve drive unit operative in response to differential pressure between the pressure of the inlet section of the valve case and signal pressure introduced to a signal port for opening the second pilot valve element when the differential pressure reaches a second predetermined value.

公开(公告)号：US07814823B2

公开(公告)日：2010-10-19

申请号：US11632422

申请日：2006-04-14

申请人： Masakazu Takahashi ,  Kazumasa Yuasa

发明人： Masakazu Takahashi ,  Kazumasa Yuasa

IPC分类号： F01B3/00 ,  F01B13/04 ,  F01B9/02 ,  F04B1/06

CPC分类号： F04B1/22

摘要： A feedback link which transmits a movement of a servo piston to a control sleeve of a regulator is constituted by a link lever formed of a rigid material and an expansion spring formed of a spring material. The expansion spring is formed by folding a narrow leaf spring substantially into U-shape, and provided with a pair of convexly curved plate portions extending forward from a bent portion as a base end and spread apart from each other in a forward direction. On the other hand, an indented groove which is provided on the servo piston is composed of a parallel groove portion and a tapered groove portion. The convexly curved plate portions are engaged in the parallel groove portion of the indented groove in a resilient deformed state to transmit a displacement of the servo piston from the expansion spring to the link lever.

摘要翻译： 将伺服活塞的运动传递到调节器的控制套筒的反馈链路由由刚性材料形成的连杆和由弹簧材料形成的膨胀弹簧构成。 膨胀弹簧通过将窄的板簧基本上折叠成U形而形成，并且设置有从作为基端的弯曲部分向前延伸并且向前方向彼此分开的一对凸形弯曲的板部。 另一方面，设置在伺服活塞上的凹槽由平行槽部和锥形槽部构成。 凸起弯曲的板部分在弹性变形状态下接合在凹槽的平行槽部分中，以将伺服活塞从膨胀弹簧移位到连杆。

公开(公告)号：US20080041223A1

公开(公告)日：2008-02-21

申请号：US11632422

申请日：2006-04-14

申请人： Masakazu Takahashi ,  Kazumasa Yuasa

发明人： Masakazu Takahashi ,  Kazumasa Yuasa

IPC分类号： F01B3/00

CPC分类号： F04B1/22

摘要： A feedback link which transmits a movement of a servo piston to a control sleeve of a regulator is constituted by a link lever formed of a rigid material and an expansion spring formed of a spring material. The expansion spring is formed by folding a narrow leaf spring substantially into U-shape, and provided with a pair of convexly curved plate portions extending forward from a bent portion as a base end and spread apart from each other in a forward direction. On the other hand, an indented groove which is provided on the servo piston is composed of a parallel groove portion and a tapered groove portion. The convexly curved plate portions are engaged in the parallel groove portion of the indented groove in a resilient deformed state to transmit a displacement of the servo piston from the expansion spring to the link lever.

摘要翻译： 将伺服活塞的运动传递到调节器的控制套筒的反馈链路由由刚性材料形成的连杆和由弹簧材料形成的膨胀弹簧构成。 膨胀弹簧通过将窄的板簧基本上折叠成U形而形成，并且设置有从作为基端的弯曲部分向前延伸并且向前方向彼此分开的一对凸形弯曲的板部。 另一方面，设置在伺服活塞上的凹槽由平行槽部和锥形槽部构成。 凸起弯曲的板部分在弹性变形状态下接合在凹槽的平行槽部分中，以将伺服活塞从膨胀弹簧移位到连杆。