公开(公告)号：US20250003193A1

公开(公告)日：2025-01-02

申请号：US18885836

申请日：2024-09-16

Applicant: Kubota Corporation

Inventor： Junki ITO ,  Daiki TAMBA ,  Takuma SAI

IPC: E02F9/20 ,  B60K1/00 ,  B60K11/02 ,  E02F9/08 ,  E02F9/22 ,  E02F9/26 ,  F15B15/18 ,  F15B19/00 ,  F15B21/0423

Abstract: A working machine includes an electric motor, a working device driven by power of the electric motor, an operation device to operate the working device, an operation locker switchable between an enabling position at which an operation of the working device by the operation device is enabled and a disabling position at which the operation is disabled, a cooler including an electric cooling fan, a temperature detector to detect a cooling target temperature, which is the temperature of a cooling target to be cooled by the cooler, and a controller to control a fan rotational speed, which is the rotational speed of the cooling fan, in accordance with the cooling target temperature detected by the temperature detector. The controller changes a characteristic of the fan rotational speed with respect to the cooling target temperature depending on whether the operation locker is in the enabling position or in the disabling position.

公开(公告)号：US20240271590A1

公开(公告)日：2024-08-15

申请号：US18434103

申请日：2024-02-06

Applicant: Xi'an Thermal Power Research Institute Co., Ltd ,  Northwestern Polytechnical University

Inventor： Xiaolei Jing ,  Cunliang Liu ,  Yuwen Lin ,  Dangqi Xu ,  Liang Zhao ,  Shuting Liang

IPC: F03B13/06 ,  F15B1/26 ,  F15B21/0423

CPC classification number: F03B13/06 ,  F15B1/26 ,  F15B21/0423 ,  F05B2260/42

Abstract: A device for isothermal compression, constant-pressure power generation and physical energy storage includes an air storage tank, a weight, a piston and a piston rod. An inner cavity of the air storage tank is divided into first to third chambers by first and second heat conducting baffles. The piston is arranged in the second chamber. The piston rod has a lower end connected with the piston and an upper end connected with the weight. First and second elastic sealing belts are arranged in the first and third chambers, respectively. The first chamber includes a first water injection port and a first water outlet above the first elastic sealing belt, and the third chamber includes a second water injection port and a second water outlet above the second elastic sealing belt. A bottom of the air storage tank includes an air injection port and a compressed air outlet.

公开(公告)号：US20240263652A1

公开(公告)日：2024-08-08

申请号：US18596408

申请日：2024-03-05

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hirotoshi TORII

IPC: F15B21/0423

CPC classification number: F15B21/0423

Abstract: A hydraulic unit includes an oil tank, a hydraulic pump, a first return pipe, and a first heat exchanger. The oil tank stores a hydraulic oil. The hydraulic pump supplies the hydraulic oil in the oil tank to an actuator. The first return pipe returns the hydraulic oil from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank. The first heat exchanger causes a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe.

公开(公告)号：US20230349402A1

公开(公告)日：2023-11-02

申请号：US18221055

申请日：2023-07-12

Applicant: KUBOTA CORPORATION

Inventor： Daiki ABE ,  Ryota HAMAMOTO ,  Hiroaki NAKAGAWA

IPC: F15B21/0423 ,  F01P7/04 ,  E02F9/22

CPC classification number: F15B21/0423 ,  F01P7/044 ,  E02F9/226 ,  F15B2211/62 ,  F15B21/02

Abstract: A working machine includes a prime mover, a hydraulic pump driven by power of the prime mover, a cooler including a cooling fan rotated by either the power of the prime mover or hydraulic fluid delivered from the hydraulic pump, and a controller configured or programmed to perform a reduction control for reducing a target fan rotation speed that is a target rotation speed of the cooling fan in response to reduction of an actual prime mover rotation speed that is an actual rotation speed of the prime mover, and to perform, after the reduction control, a restoration control for restoring the target fan rotation speed. The controller is configured or programmed to make a difference between a reduction rate of the target fan rotation speed in the reduction control and an increase rate of the target fan rotation speed in the restoration control.

公开(公告)号：US11384512B2

公开(公告)日：2022-07-12

申请号：US17275945

申请日：2019-10-31

Applicant: KOMATSU LTD.

Inventor： Akira Nakashima ,  Isamu Oda

IPC: E02F9/22 ,  F15B21/0423 ,  F15B11/16 ,  F15B15/20 ,  E02F3/76 ,  E02F9/20

Abstract: A load sensing valve maintains a differential pressure at a set pressure by controlling a regulator in accordance with a differential pressure between a discharge pressure of a hydraulic pump and a load pressure of hydraulic actuators. A set pressure control device controls the set pressure. A controller controls the set pressure control device to reduce the set pressure more than when the work implement is being operated, when a predetermined determination condition that includes the work implement not being operated is satisfied.

公开(公告)号：US11255358B1

公开(公告)日：2022-02-22

申请号：US17016136

申请日：2020-09-09

Applicant: Bryan J. Srock

Inventor： Bryan J. Srock

IPC: F17D5/00 ,  F15B20/00 ,  F15B21/0423 ,  B67D7/32 ,  F28F11/00 ,  F16L55/168

Abstract: A manifold structure for a fluid reclamation apparatus incorporated into a hydraulic system having inner and outer fluid lines and with annular containment space between the inner and outer fluid lines for capturing fluid leaking from the inner fluid line, the manifold structure being connected to least one end the inner and outer fluid lines and contains a chamber for receiving leaked fluid from the annular space and including a manifold inner sleeve to which the inner fluid line is coupled, the inner sleeve being retained within a manifold outer sleeve to which the outer fluid line is coupled and having a lateral bore extending from the chamber and through the outer sleeve for delivering leaked fluid into a reclamation line and back into the hydraulic system, the inner sleeve being rotatably mounted within the outer sleeve by at least one O-ring seated in a groove around the inner sleeve and sealingly abutting the inner surface of the outer sleeve.

公开(公告)号：US11255353B2

公开(公告)日：2022-02-22

申请号：US17185333

申请日：2021-02-25

Applicant: KUBOTA CORPORATION

Inventor： Yuji Fukuda ,  Keigo Honda

IPC: F15B11/16 ,  E02F3/42 ,  E02F9/22 ,  E02F3/34 ,  F15B13/02 ,  F15B21/0423 ,  F16K11/07 ,  F15B13/04

Abstract: A hydraulic system includes a hydraulic pump to output an operation fluid, first and second hydraulic devices to be operated by the operation fluid, first and second control valves to control the first and second hydraulic device, respectively, first and second communication tubes connecting the first hydraulic device to the first control valve, a supply fluid tube connecting the first control valve to the second control valve, the supply fluid tube being configured to supply the return fluid to the second control valve, first and second connection fluid tubes disposed on the first control valve, a discharge fluid tube connected to the first control valve, first and second branching fluid tubes branched from the first and second connection fluid tubes, respectively, first and second throttles disposed on the first and second branching fluid tubes, respectively, the second throttle being smaller than the first throttle.

公开(公告)号：US11022157B2

公开(公告)日：2021-06-01

申请号：US16678448

申请日：2019-11-08

Applicant: ZF Friedrichshafen AG

Inventor： Alexander Haberstock ,  Armin Haugg ,  Thilo Schmidt ,  Markus Herrmann

IPC: F15B21/0423 ,  F16H61/02 ,  F16K49/00

Abstract: A cooling prioritization valve (5) for a hydraulic system (4) of a motor vehicle transmission (3) includes a valve housing (6), a valve slide (7), an inlet (18), an outlet (15), and a further outlet (21). A secondary system pressure circuit (39) of the hydraulic system (4) can be connected to the inlet (18), a cooler (54) can be connected to the outlet (15) or to the further outlet (21), and a suction loading (44) can be connected to the outlet (15) or to the further outlet (21). In a starting position, the inlet (18) is not connected either to the outlet (15) or to the further outlet (21). In a first control position, the inlet (18) is connected to the outlet (15). In a second control position, the inlet (18) is connected to the outlet (15) and the further outlet (21).

公开(公告)号：US20200271143A1

公开(公告)日：2020-08-27

申请号：US16799570

申请日：2020-02-24

Applicant: Clark Equipment Company

Inventor： Mark Binstock ,  Scott LaCoe ,  Kjell Kroh ,  Kenneth L. Dieter

IPC: F15B21/041 ,  F15B21/0423 ,  E02F9/20

Abstract: A hydraulic sub-assembly of the present disclosure can be used with a power machine. The hydraulic sub-assembly can include a support panel and a plurality of components secured to the support panel, to be supported by the support panel relative to the power machine. The plurality of components can include a control valve configured to provide hydraulic control of the work functions and hydraulic. The support panel can be configured to be a structural portion of a cab of the power machine.

公开(公告)号：US10746200B1

公开(公告)日：2020-08-18

申请号：US16574117

申请日：2019-09-18

Applicant: Caterpillar SARL

Inventor： Adam Adeeb ,  Steven Johnson

IPC: F15B13/08 ,  E02F9/22 ,  F15B13/06 ,  F15B11/16 ,  F15B11/17 ,  F01P7/04 ,  B60W10/20 ,  B60W10/188 ,  B60W10/30 ,  B60T13/14 ,  B62D5/07 ,  F15B21/0423

Abstract: A hydraulic valve assembly for a work vehicle includes a fan and brake function module. A first pump supplies hydraulic pressure to a fan circuit and to first and second service brake circuits of the vehicle. A second pump supplies hydraulic pressure to a steering and work function module that in turn supplies hydraulic pressure to a steering circuit and a work function circuit of the vehicle. The hydraulic valve assembly may also include a work control module and an auxiliary module. The modules of the hydraulic valve assembly are separably connected together via interface surfaces.