公开(公告)号：US20240326217A1

公开(公告)日：2024-10-03

申请号：US18130038

申请日：2023-04-03

申请人： Caterpillar Inc.

发明人： Cody MOORE

IPC分类号： B25D17/06 ,  E02F3/96 ,  E02F9/22 ,  F15B1/04 ,  F15B11/08 ,  F15B13/02 ,  F15B15/00

CPC分类号： B25D17/06 ,  E02F3/966 ,  E02F9/2217 ,  E02F9/2225 ,  F15B1/04 ,  F15B11/08 ,  F15B13/027 ,  F15B15/00 ,  B25D2217/0023 ,  E02F9/2285

摘要： A piston for a hydraulic hammer of a work machine is disclosed. The piston comprises a first portion having a first diameter, a second portion having a second diameter larger than the first diameter, the second portion having a plurality of grooves, and a third portion having a third diameter less than the second diameter.

公开(公告)号：US11788591B2

公开(公告)日：2023-10-17

申请号：US17051819

申请日：2019-04-29

申请人： POCLAIN HYDRAULICS INDUSTRIE

发明人： Gilles Grillon ,  Loic Bonnard ,  Dominique Costaz ,  Julien Engrand ,  Philippe Telega

IPC分类号： F16D55/38 ,  F16D65/18 ,  F16D55/40 ,  F15B15/00 ,  B60K7/00 ,  B60T13/58 ,  F16D121/04 ,  F16D121/12

CPC分类号： F16D55/38 ,  F15B15/00 ,  F16D65/186 ,  B60K7/0015 ,  B60T13/58 ,  F16D55/40 ,  F16D2121/04 ,  F16D2121/12

摘要： A braking device may include a brake casing rotatably assembled with respect to a shaft along an axis of rotation, first braking elements and second braking elements, forming a stack, an elastic return element configured to exert an application force on the first and second braking elements, and a brake release actuator, adapted to bias the elastic return element along a direction opposing the application direction. The braking device a may include a diffusion wedge and a pressure wedge positioned respectively to bear against the stack and against the elastic return element. The diffusion wedge and the pressure wedge may have contact surfaces defining an annular linear contact about the axis of rotation.

公开(公告)号：US20230313793A1

公开(公告)日：2023-10-05

申请号：US18206304

申请日：2023-06-06

申请人： White Drive Motors and Steering sp. z.o.o.

发明人： Adam Mrowczynski

IPC分类号： F04C2/10 ,  F15B15/00

CPC分类号： F04C2/10 ,  F15B15/00 ,  F15B2211/40

摘要： A hydraulic machine (1) has a working section (6) and a fluid control section (28). The fluid control section includes a spool (3) that is rotatable in a cylindrical bore (30) about an axis (4). A distributor plate (18) extends intermediate of the control section and the working section. The spool includes an axial recess (10) which is axially bounded by a radially extending annular wall (44). A front face (48) of the annular wall rotates in abutting engagement with a plate face contact area (50) of the distributor plate. Hydraulic fluid flows through at least one groove (52) that extends radially and circumferentially across the abutting areas of the spool and the distributor plate to provide lubrication and heat absorption.

公开(公告)号：US11691846B2

公开(公告)日：2023-07-04

申请号：US16772162

申请日：2019-09-12

申请人： China University of Mining and Technology

发明人： Gang Shen ,  Zhencai Zhu ,  Xiang Li ,  Yu Tang ,  Guohua Cao ,  Gongbo Zhou ,  Songyong Liu ,  Yuxing Peng ,  Hao Lu

IPC分类号： B66B1/28 ,  G06F30/23 ,  B66B19/00 ,  F15B15/00 ,  G05B13/04 ,  G06F111/10

CPC分类号： B66B1/28 ,  B66B19/00 ,  F15B15/00 ,  G05B13/042 ,  G06F30/23 ,  G06F2111/10

摘要： The present invention discloses a hoisting container pose control method of a double-rope winding type ultra-deep vertical shaft hoisting system. The method comprises the following steps of step 1, building a mathematical model of a double-rope winding type ultra-deep vertical shaft hoisting subsystem; step 2, building a position closed-loop mathematical model of an electrohydraulic servo subsystem; step 3, outputting a flatness characteristics of a nonlinear system; step 4, designing a pose leveling flatness controller of a double-rope winding type ultra-deep vertical shaft hoisting subsystem; and step 5, designing a position closed-loop flatness controller of the electrohydraulic servo subsystem.

公开(公告)号：US20230151827A1

公开(公告)日：2023-05-18

申请号：US17917329

申请日：2021-05-06

申请人： AUMA Riester GmbH & Co. KG

发明人： Matthias TRITSCHLER ,  Peter MALUS ,  Lutz STÖCKLIN ,  Guido KOCH

IPC分类号： F15B1/04 ,  F15B15/00 ,  F15B1/027

CPC分类号： F15B1/04 ,  F15B15/00 ,  F15B1/027 ,  F16K31/05

摘要： An actuator (1) having an energy accumulator (6), with which an emergency drive (5) can be supplied, is configured to be tensioned by an electric motor (2). The motor (2) displaces at least one engaging element (41, 42) of the energy accumulator (6), on which a restoring force of the energy accumulator (6) acts, along an actuating travel in normal operating mode.

公开(公告)号：US20230112211A1

公开(公告)日：2023-04-13

申请号：US18079628

申请日：2022-12-12

申请人： KUBOTA CORPORATION

发明人： Hiroshi HORII

IPC分类号： E02F9/22 ,  E02F9/20 ,  E02F3/32 ,  E02F3/42 ,  E02F3/43 ,  F15B13/02 ,  F15B15/00 ,  F15B13/06

摘要： A working machine includes a machine body, a first hydraulic actuator mounted on the machine body, a first control valve that controls the first hydraulic actuator, a controller that controls the first control valve, and a second hydraulic actuator that is different from the first hydraulic actuator. When the second hydraulic actuator and the first hydraulic actuator are operated in combination, the controller reduces the amount of change in the flow rate of a hydraulic fluid supplied from the first control valve to the first hydraulic actuator with respect to changes in a manipulation amount to operate the first hydraulic actuator to a value smaller than that when the first hydraulic actuator is solely operated.

公开(公告)号：US11530691B2

公开(公告)日：2022-12-20

申请号：US16575744

申请日：2019-09-19

申请人： Mainspring Energy, Inc.

发明人： Matt Svrcek ,  Jodie Prudhomme

IPC分类号： F04B1/00 ,  F16J1/09 ,  F15B15/00 ,  F16F9/36 ,  F04B1/0448 ,  F16J9/16 ,  F16J9/22 ,  F16J9/28 ,  F16J15/34

摘要： A sealing ring includes a first sealing element having a first mating surface and a second sealing element having a second mating surface. A high-pressure boundary extends across at least a portion of the first sealing element and across at least a portion of the second sealing element, and
a low-pressure boundary extends across at least a portion of the first sealing element and across at least a portion of the second sealing element. The first mating surface, the second mating surface, or both, includes a recess open to the low-pressure boundary and not open to the high-pressure boundary. The recess may include a groove, for example. The first mating surface is sealed against the second mating surface by a first force acting on the first sealing element and a second force acting on the second sealing element. These forces act to pressure-lock the assembly.

公开(公告)号：US20210123216A1

公开(公告)日：2021-04-29

申请号：US17251069

申请日：2019-03-13

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Koji HYODO ,  Fumihiro NAKAO ,  Yasunori MIYAMOTO ,  Masaki NUKII

IPC分类号： E02F9/22 ,  E02F3/28 ,  E02F9/02 ,  F15B15/00

摘要： A loading vehicle is capable of improving work efficiency by adjusting engine rotational speed with high accuracy in accordance with an operation state of the working device. An HST traveling driven wheel loader has an electrically controlled HST pump. A controller is configured to control input torque of the HST pump 31 and solenoid proportional pressure reducing valve is configured to generate control pressure for controlling displacement volume of the pump based on a control signal from the controller. The controller is configured to calculate the displacement volume q of the HST pump based on discharge pressure Pf of a loading hydraulic pump so that maximum input torque Thst of the HST pump decreases as the discharge pressure Pf or input torque of the loading hydraulic pump increases, and output a control signal corresponding to the calculated displacement volume q to the solenoid proportional pressure reducing valve.

公开(公告)号：US10989330B1

公开(公告)日：2021-04-27

申请号：US16701660

申请日：2019-12-03

申请人： Facebook Technologies, LLC

发明人： Sean Jason Keller ,  David R. Perek ,  Tristan Thomas Trutna ,  Nicholas Roy Corson ,  Raymond King ,  Jack Lindsay ,  Riccardo DeSalvo ,  Joseph Minh Tien

IPC分类号： F15B15/00 ,  F16K99/00 ,  F15C3/04 ,  G06F3/01 ,  G08B6/00 ,  G06T19/00

摘要： A fluidic device controls fluid flow in channel from a source to a drain. In some embodiments, the fluidic device comprises a channel and a gate. The channel is configured to transport a fluid from the source to the drain. The gate controls a rate of fluid flow in the channel in accordance with the fluid pressure within the gate. Specifically, the gate is configured to induce a first flow rate of the fluid in the channel in accordance with a low pressure state of the gate, and a second flow rate of the fluid in the channel in accordance with a high pressure state of the gate. In certain embodiments, the first flow rate is greater than the second flow rate. In alternative embodiments, the second flow rate is greater than the first flow rate.

公开(公告)号：US20190143441A1

公开(公告)日：2019-05-16

申请号：US16245580

申请日：2019-01-11

申请人： NEWFREY LLC

发明人： Christoph EISENBERG ,  Jochen HAIN ,  Nicolas NAB ,  Wolfgang OBERMANN ,  Michael SCHNEIDER

IPC分类号： B23K11/00 ,  B23K11/36 ,  B23K9/20 ,  B23K9/32 ,  F15B15/00

摘要： A joining head for the joining of a joining element to a workpiece, wherein the joining head) has a fluid cylinder that acts in an axial direction for actuating a loading pin, and the fluid cylinder has a cross-sectional area and defines a dimension of the joining head in a predetermined radial direction, and the cross-sectional area of the fluid cylinder deviates from a circular shape in order to reduce the dimension of the joining head in the predetermined radial direction.