公开(公告)号：US20240159252A1

公开(公告)日：2024-05-16

申请号：US18284249

申请日：2022-03-17

Applicant: EAGLE INDUSTRY CO., LTD.

Inventor： Yoshiyuki SHIMADA ,  Koji SATO ,  Yuta OKAMOTO ,  Tomoki SEKI ,  Tatsuhiro ARIKAWA

IPC: F15B1/04 ,  F15B1/26

CPC classification number: F15B1/04 ,  F15B1/26

Abstract: A fluid circuit includes first switching valve that switches between flow passages and first flow passages according to a change in a fluid pressure to be applied, a second switching valve that is switched to a flow passage which applies the fluid pressure to the first switching valve, when a piston has reached an initial position or an end position, and second flow passages. A biasing force of a biasing member when the piston reaches the end position is smaller than a pressing force acting on the piston due to the fluid pressure caused by a fluid supply device, and a biasing force of the biasing member when the piston reaches the initial position is larger than a sum of a flow passage resistance force acting on the first flow passages and a flow passage resistance force acting on the second flow passages.

公开(公告)号：US20240167488A1

公开(公告)日：2024-05-23

申请号：US18284248

申请日：2022-03-17

Applicant: EAGLE INDUSTRY CO., LTD.

Inventor： Tatsuhiro ARIKAWA ,  Yoshiyuki SHIMADA ,  Tomoki SEKI ,  Yuta OKAMOTO ,  Koji SATO

IPC: F15B1/04 ,  F15B13/02 ,  F15B19/00

CPC classification number: F15B1/04 ,  F15B13/027 ,  F15B19/00

Abstract: A fluid circuit includes: a fluid supply device that delivers a working fluid; and an accumulator that accumulates the working fluid which is increased in pressure. A variable throttle valve and the accumulator are disposed in a branch flow passage branched from a main flow passage extending from the fluid supply device to an actuator. A first pressure detector is provided between the variable throttle valve and the accumulator, a second pressure detector is provided in the branch flow passage between the main flow passage and the variable throttle valve, and the variable throttle valve is controllable based on pressures detected by the first pressure detector and the second pressure detector. A check valve is provided in the branch flow passage.

公开(公告)号：US20240159255A1

公开(公告)日：2024-05-16

申请号：US18284520

申请日：2022-03-17

Applicant: EAGLE INDUSTRY CO., LTD.

Inventor： Yoshiyuki SHIMADA ,  Koji SATO ,  Yuta OKAMOTO ,  Tomoki SEKI ,  Tatsuhiro ARIKAWA

IPC: F15B15/14 ,  F15B3/00 ,  F15B15/22

CPC classification number: F15B15/1476 ,  F15B3/00 ,  F15B15/226 ,  F15B2211/20538 ,  F15B2211/40515 ,  F15B2211/4159 ,  F15B2211/7716

Abstract: A first switching valve that switches between flow passages which allow communication between a first pressure-receiving chamber and a fluid supply device side and flow passages which allow communication between a second pressure-receiving chamber and the fluid supply device side, according to a change in a fluid pressure to be applied, and a second switching valve that is switched to flow passages which apply the fluid pressure to the first switching valve, are provided. The second switching valve includes return device, and is provided to be reciprocatable between an operation position to which the second switching valve is moved by a stroke of a piston and a return position to which the second switching valve is moved by the return device. The piston and the second switching valve are movable independently of each other.