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    SHOVEL
    2.
    发明公开
    SHOVEL 审中-公开

    公开(公告)号：US20240052595A1

    公开(公告)日：2024-02-15

    申请号：US18471532

    申请日：2023-09-21

    申请人： SUMITOMO HEAVY INDUSTRIES, LTD.

    发明人： Yoshiyasu ITSUJI

    IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B13/02 ,  F15B11/024

    CPC分类号： E02F9/2203 ,  E02F9/2217 ,  F15B11/16 ,  F15B13/02 ,  F15B11/024 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2011/0243

    摘要： A shovel includes a plurality of hydraulic actuators each configured to move in response to a movement command; a pressure sensor configured to detect a pressure of hydraulic oil in each of the hydraulic actuators; a meter-in valve in correspondence with each of the hydraulic actuators; a meter-out valve in correspondence with each of the hydraulic actuators; and a controller having a plurality of output characteristics set for each of the hydraulic actuators. The controller is configured to calculate a required flow rate corresponding to the movement command, based on an output characteristic corresponding to the movement command from among the plurality of output characteristics.

    Compressed air processing system for commercial vehicle
    5.
    发明授权
    Compressed air processing system for commercial vehicle 有权

    公开(公告)号：US11439945B2

    公开(公告)日：2022-09-13

    申请号：US17555546

    申请日：2021-12-20

    申请人： SEMYUNGTECH CO., LTD.

    发明人： Seong-won Moon ,  Sang-sun Park

    IPC分类号： B01D53/04 ,  B01D53/26 ,  B01D46/00 ,  F15B11/024 ,  F15B13/02 ,  B60T17/00

    摘要： The present disclosure provides a compressed air processing system of which the operation of supplying compressed air and the regeneration operation can be efficiently controlled by an electronic control unit. In particular, the present disclosure is characterized in that the pressure of a regeneration sequence valve installed in a regeneration line is increased over a set pressure by controlling a valve, which is electronically controlled, to switch, so the opening time of the regeneration line is delayed in comparison to the opening time of an unloader valve, whereby regeneration efficiency is improved.

    STEERING DEVICE, STEERING DEVICE FOR SHIP AND SWITCHING VALVE
    6.
    发明申请
    STEERING DEVICE, STEERING DEVICE FOR SHIP AND SWITCHING VALVE 有权

    公开(公告)号：US20220234709A1

    公开(公告)日：2022-07-28

    申请号：US17203089

    申请日：2021-03-16

    申请人： HITACHI ASTEMO, LTD.

    发明人： Xing SUN ,  Hayato TSUTSUI

    IPC分类号： B63H20/12 ,  F15B13/02 ,  F15B11/024 ,  F15B15/14

    摘要： A steering device includes: a cylinder demarcated into first and second chambers by a piston; a main valve having first and second shuttle chambers; a hydraulic source having first and second discharge ports; a first oil passage configured to connect the first chamber and the first shuttle chamber; a second oil passage configured to connect the second chamber and the second shuttle chamber; a third oil passage configured to connect the first shuttle chamber and the first discharge port; a fourth oil passage configured to connect the second shuttle chamber and the second discharge port; and a tank connected to the main valve via the third oil passage and the fourth oil passage. One of the first shuttle chamber and the second shuttle chamber of the main valve is in an opened state when the hydraulic source is stopped.

    HYDRAULIC ACTUATION SYSTEM FOR AN AIRCRAFT
    7.
    发明申请
    HYDRAULIC ACTUATION SYSTEM FOR AN AIRCRAFT 有权

    公开(公告)号：US20220194564A1

    公开(公告)日：2022-06-23

    申请号：US17604272

    申请日：2020-08-25

    申请人： AIRBUS OPERATIONS LIMITED

    发明人： Paul L'ALLIER ,  Andy MOUNTY ,  Sean KERR

    IPC分类号： B64C25/22 ,  B64C25/16 ,  F15B11/024 ,  F15B15/18

    摘要： An aircraft hydraulic actuation system for retracting an aircraft landing gear. The actuation system includes a supply line arranged to carry hydraulic fluid pressurized by a pump, a return line arranged to return hydraulic fluid to a reservoir, and a hydraulic actuator 128. In a first mode of operation, a first chamber 130 of the actuator 128 is supplied with pressurized hydraulic fluid from the supply line such that a piston 134 is moved in a first direction so as to move a load such as a landing gear. In a second mode of operation, the first chamber 130 is taken out of fluid communication with the supply line and a second chamber 132 is in fluid communication with the return line, such that the piston 134 is able to be moved under the influence of the load, for example when the landing gear extends under gravity.

    Hydraulic system for working machine
    8.
    发明授权
    Hydraulic system for working machine 有权

    公开(公告)号：US11215201B2

    公开(公告)日：2022-01-04

    申请号：US16366150

    申请日：2019-03-27

    申请人： KUBOTA CORPORATION

    发明人： Yuji Fukuda ,  Keigo Honda

    IPC分类号： F15B11/024 ,  E02F9/20 ,  E02F9/22 ,  F15B11/044

    摘要： A hydraulic system includes a hydraulic pump, a first hydraulic actuator, a second hydraulic actuator, a first control valve to control the first hydraulic actuator, a second control valve to control the second hydraulic actuator, the second control valve being arranged on a downstream side of the first control valve, and a discharge fluid tube in which the operation fluid flows. The hydraulic system further includes a first fluid tube in which a return fluid flows toward the second control valve. The hydraulic system further includes a second fluid tube in which a supply fluid flows toward the first hydraulic actuator, a third fluid tube coupling the first fluid tube to the discharge fluid tube, and a fourth fluid tube in which the return fluid flows toward the second fluid tube, the fourth fluid tube being connected to the first fluid tube.

    FLUID CIRCUIT OF AIR CYLINDER
    9.
    发明申请
    FLUID CIRCUIT OF AIR CYLINDER 有权

    公开(公告)号：US20210131454A1

    公开(公告)日：2021-05-06

    申请号：US17251093

    申请日：2019-06-07

    申请人： SMC CORPORATION

    发明人： Gohei HARIMOTO ,  Mitsuru SENOO ,  Yuto FUJIWARA

    IPC分类号： F15B11/06 ,  F15B11/024 ,  F15B11/044

    摘要： A first fluid circuit is a fluid circuit of an air cylinder provided with an air cylinder with a first air chamber and a second air chamber that are defined by a piston; a switching valve that is switched between the drive step and return step of the piston; a first flow channel between the first air chamber and the switching valve; and a second flow channel between the second air chamber and the switching valve. Two speed control valves are provided in series in the second flow channel.

    Hydraulic system of construction machinery
    10.
    发明授权
    Hydraulic system of construction machinery 有权

    公开(公告)号：US10988915B2

    公开(公告)日：2021-04-27

    申请号：US16604508

    申请日：2018-04-10

    申请人： DOOSAN INFRACORE CO., LTD.

    发明人： Byung Il Kang

    IPC分类号： E02F9/22 ,  F15B11/024 ,  F15B21/14 ,  F15B1/02

    摘要： A hydraulic system of construction machinery includes: a boom cylinder divided; a first boom hydraulic line serving to supply a hydraulic oil to the boom cylinder during an ascending operation of a boom; a second boom hydraulic line serving to supply the hydraulic oil to the boom cylinder during a descending operation of the boom; a regeneration line serving so that the hydraulic oil discharged from the head side of the boom cylinder flows during the descending operation of the boom; a circulation line connected to the second boom hydraulic line; an accumulator connected to the regeneration line and serving to accumulate the hydraulic oil discharged from the boom cylinder; a boom regeneration valve including a first regeneration spool and a second regeneration spool; and a control unit serving to adjust opening areas of the first regeneration spool and the second regeneration spool during the descending operation of the boom.