公开(公告)号：US11959500B2

公开(公告)日：2024-04-16

申请号：US17640498

申请日：2020-08-03

Applicant: SMC CORPORATION

Inventor： Youji Takakuwa ,  Akihiro Kazama ,  Hiroyuki Asahara ,  Kengo Monden

IPC: F15B11/04 ,  F15B11/06 ,  F15B15/14 ,  F15B15/20 ,  F15B15/22

CPC classification number: F15B15/1433 ,  F15B11/0413 ,  F15B15/204 ,  F15B15/22 ,  F15B11/06 ,  F15B2211/30505 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/40515 ,  F15B2211/40584 ,  F15B2211/40592 ,  F15B2211/7053 ,  F15B2211/75 ,  F15B2211/8855

Abstract: The present invention pertains to an air cylinder (10) in which flow rate controllers (24, 24A) are built into a head cover (14) and a rod cover (16), said flow rate controllers (24, 24A) being provided with a first flow rate adjustment part (28) connected between a port (14a, 16a) and a cylinder chamber (12c), a second flow rate adjustment part (32) provided adjacent to the first flow rate adjustment part (28), and a pilot check valve (38) connected in series to the second flow rate adjustment part (32). In response to the pressure of pilot air, the pilot check valve (38) switches between a state in which the passage of exhaust air from the cylinder chamber (12c) is permitted and a state in which the passage of exhaust air is prevented.

公开(公告)号：US11773879B2

公开(公告)日：2023-10-03

申请号：US17640237

申请日：2020-08-03

Applicant: SMC CORPORATION

Inventor： Youji Takakuwa ,  Akihiro Kazama ,  Hiroyuki Asahara ,  Kengo Monden

IPC: F15B15/22 ,  F15B11/06 ,  F15B13/04 ,  F15B13/02 ,  F15B11/04 ,  G05D7/01 ,  F15B15/20

CPC classification number: F15B15/22 ,  F15B11/0413 ,  F15B11/06 ,  F15B13/027 ,  F15B13/0401 ,  F15B15/204 ,  F15B2211/30505 ,  F15B2211/40515 ,  F15B2211/40584 ,  F15B2211/40592 ,  F15B2211/41527 ,  F15B2211/473 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7053 ,  F15B2211/75 ,  F15B2211/8855 ,  G05D7/014

Abstract: In a flow rate controller and a drive device, a housing is provided therein with a first flow passage, a second flow passage adjacent to the first flow passage, a first throttle valve provided to the first flow passage, and a second throttle valve provided to the second flow passage. A pilot check valve is provided to the second flow passage and is connected in series to the second throttle valve. A pilot air flow passage communicates with a pilot port of the pilot check valve for supplying and discharging pilot air, and a third throttle valve is provided to the pilot air flow passage. In response to the pressure of the pilot air, the pilot check valve switches between a state in which the passage of exhaust air discharged from an air cylinder is permitted and a state in which passage of the exhaust air is prevented.

公开(公告)号：US11746502B2

公开(公告)日：2023-09-05

申请号：US17014187

申请日：2020-09-08

Applicant: SUMITOMO CONSTRUCTION MACHINERY CO., LTD.

Inventor： Takashi Yamamoto

IPC: E02F9/22 ,  E02F9/20 ,  E02F9/26 ,  F15B11/04 ,  F15B21/08 ,  E02F3/43

CPC classification number: E02F9/2203 ,  E02F9/2004 ,  E02F9/2271 ,  E02F9/26 ,  F15B11/04 ,  F15B21/087 ,  E02F3/435 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/75 ,  F15B2211/78

Abstract: An excavator includes a plurality of hydraulic actuators, and a setting unit that performs a setting related to operation speeds of the plurality of hydraulic actuators during a combined operation of the hydraulic actuators, so that when the operation speed of one of the actuators increases, the operation speed of another one of the actuators decreases. The setting unit is capable of performing the setting for a plurality of kinds of combined operations.

公开(公告)号：US11643793B2

公开(公告)日：2023-05-09

申请号：US16671985

申请日：2019-11-01

Applicant: Takeuchi Mfg. Co., Ltd.

Inventor： Koichi Shimizu ,  Shumpei Okutani ,  Kengo Kumeuchi

IPC: E02F9/20 ,  E02F9/22 ,  E02F3/42 ,  E02F3/43 ,  F15B11/04 ,  F15B13/02 ,  E02F3/32 ,  E02F3/96

CPC classification number: E02F9/2235 ,  E02F3/425 ,  E02F3/435 ,  E02F9/2004 ,  E02F9/2228 ,  E02F9/2271 ,  E02F9/2296 ,  F15B11/04 ,  F15B13/02 ,  E02F3/325 ,  E02F3/964 ,  E02F9/2285 ,  E02F9/2292

Abstract: An operation control device for a working vehicle comprises a hydraulic actuator to drive the hydraulic working device, operating oil supply source for driving the hydraulic actuator, an operating oil supply control device that performs control to supply operating oil to the hydraulic actuator, an operating device to be operated to make the hydraulic actuator work and a working gain setting device that sets a gain of working speed of the hydraulic actuator corresponding to the operation of the operating device. The operating oil supply control device controls operating oil supply from the operating oil supply source to the hydraulic actuator based on the operation output signal from the operating device and the working speed gain set by the working gain setting device.

公开(公告)号：US20220260094A1

公开(公告)日：2022-08-18

申请号：US17630653

申请日：2019-12-03

Applicant: CHINA OILFIELD SERVICES LIMITED ,  CHINA NATIONAL OFFSHORE OIL CORPORATION

Inventor： Zhibin TIAN ,  Yongren FENG ,  Tao LU ,  Lin HUANG ,  Tiemin LIU ,  Zanqing WEI ,  Yong JIANG ,  Xiaoqiang DU ,  Liping LIU ,  Xiaodong CHU

IPC: F15B11/17 ,  F15B11/04 ,  F15B11/028 ,  F15B20/00

Abstract: A hydraulic power system for a downhole device, including a first motor, a first hydraulic pump, a second hydraulic pump, a first main oil circuit, a second main oil circuit, a switching control module and a first execution module. The first motor has a first output shaft which drives the first hydraulic pump and has an oil outlet connected to an input end of the first main oil circuit and a second output shaft which drives the second hydraulic pump and has an oil outlet connected to an input end of the second main oil circuit; the first execution module is connected to an output end of the first main oil circuit; displacement of the first hydraulic pump is smaller than that of the second hydraulic pump; and the switching control module is connected between the first main oil circuit and the second main oil circuit.

公开(公告)号：US20220251804A1

公开(公告)日：2022-08-11

申请号：US17620131

申请日：2020-06-25

Applicant: LIEBHERR-WERK BISCHOFSHOFEN GMBH

Inventor： Hans KNAPP ,  Josef STOCK ,  Rupert GAPPMAIER ,  Christoph KIEGERL ,  Reinhard WINDHOFER ,  Florian ALTENBERGER

IPC: E02F9/22 ,  F15B11/04

Abstract: The present invention relates to a mobile work machine, in particular to a wheeled loader, having a hydraulic circuit, having a pump for conveying a hydraulic medium through the hydraulic circuit, and having at least one control block having an inflow control edge and an outflow control edge for controlling the flow of the hydraulic medium, wherein the work machine has a working tool and a cylinder for actuating the working tool and wherein the cylinder has an outflow and in inflow for the hydraulic medium, and wherein the outflow is in fluid communication with the outflow control edge and the inflow is in fluid communication with the inflow control edge, and wherein the inflow control edge does not have any or has fewer fine control notches than the outflow control edge and thus works in a largely unrestricted manner, while the outflow control edge is equipped with one or more fine control notches so that with a pulling load at the working tool, the outflow control edge restricts the outflow amount through the outflow of the cylinder.

公开(公告)号：US20210404486A1

公开(公告)日：2021-12-30

申请号：US17292223

申请日：2019-10-30

Applicant: SMC CORPORATION

Inventor： Youji TAKAKUWA ,  Akihiro KAZAMA ,  Hiroyuki ASAHARA ,  Kengo MONDEN

IPC: F15B11/06 ,  F15B11/04 ,  F15B13/04

Abstract: A main flow path that introduces high-pressure air to an air cylinder, or discharges exhaust air therefrom, includes a sub flow path provided alongside the main flow path; an exhaust flow rate adjustment unit that suppresses the operation speed of the air cylinder by adjusting the flow rate of the exhaust air flowing through the sub flow path; and a switching valve that is connected between the air cylinder, the main flow path and the sub flow path, and that connects the main flow path and the sub flow path to the air cylinder in a switching manner. The switching valve is constituted by a spool valve.

公开(公告)号：US11131081B2

公开(公告)日：2021-09-28

申请号：US16759872

申请日：2018-10-12

Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.

Inventor： Masatoshi Kozui

IPC: F15B11/04 ,  F15B11/08 ,  E02F9/22

Abstract: Provided is a slewing-type working machine including: a slewing motor; a capacity control device; a slewing control device operated by a slewing instruction operation to allow hydraulic fluid to be supplied from a hydraulic pump to the slewing motor; a slewing parking brake; a brake switching device; a brake release instruction unit which inputs a brake release instruction to the brake switching device so as to make the brake switching device switch the slewing parking brake to a brake releasing state after allowing hydraulic fluid to be supplied to the slewing motor; and a capacity limiting unit that limits the capacity of the slewing motor controlled by the capacity control device to a predetermined brake-release capacity value or less until a brake release point and allows the capacity to increase after the brake release point.

公开(公告)号：US11073170B2

公开(公告)日：2021-07-27

申请号：US16755079

申请日：2018-10-05

Applicant: NORRHYDRO OY

Inventor： Ari Lappalainen ,  Mika Sahlman ,  Jussi Mäkitalo ,  Peter Stambro

IPC: F15B1/02 ,  F15B11/04

Abstract: A hydraulic system including: a pressure line; a pump; an actuator; a valve device configured to control the flow of pressurized hydraulic fluid to the actuator; an electronic control unit configured to control the valve device by a control signal proportional to the desired speed of the actuator at any given time; a pressure accumulator capable of supplying, together with the pump, pressurized hydraulic fluid for moving the actuator; a sensor device configured to measure, directly or indirectly, the amount of pressurized hydraulic fluid in the pressure accumulator at any given time; setting devices configured to set a setting signal to be proportional with the desired speed of the actuator at any given time. The electronic control unit is configured to restrict the targeted speed of the actuator not to exceed a predetermined maximum speed which is proportional to the amount of pressurized hydraulic fluid in the pressure accumulator.

公开(公告)号：US10920797B2

公开(公告)日：2021-02-16

申请号：US16634891

申请日：2018-10-19

Applicant: Komatsu Ltd.

Inventor： Yuusuke Miyamoto ,  Yuichi Hishinuma

IPC: F15B11/024 ,  E02F9/22 ,  F15B11/08 ,  F15B21/14 ,  F15B11/04

Abstract: A hydraulic circuit includes: a direction switching valve, which is in a state where a bottom oil path is connected to a first tank oil path and where a bypass oil path is connected to a second tank oil path when a pump oil path is connected to a rod oil path and when the rod oil path is connected to the bypass oil path when the pump oil path is connected to the bottom oil path, and a pilot operation control valve which allows flows of oil in both directions between the direction switching valve and the bottom oil path when the pump oil path is connected to the rod oil path and allows only a flow of oil from the direction switching valve to the bottom oil path when the pump oil path is connected to the bottom oil path by the direction switching valve.