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公开(公告)号：US10155258B2
公开(公告)日：2018-12-18
申请号：US15007360
申请日：2016-01-27
申请人： Michael J. Marx
发明人： Michael J. Marx
摘要： A portable workstation includes a frame, a plurality of wheels coupled to the frame, a handle coupled to the frame, a pneumatic inlet port coupled to the frame and a pump coupled to the frame and pneumatically coupled to the pneumatic inlet port. The pump pumps hydraulic fluid. A plurality of hydraulic outlet ports is coupled to the frame and is hydraulically coupled to the pump.
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公开(公告)号：US10150657B2
公开(公告)日：2018-12-11
申请号：US15447815
申请日：2017-03-02
发明人： Kota Miyoshi
IPC分类号： F16D31/02 , B66C23/86 , B66C13/16 , B66C13/20 , B66C23/00 , F15B11/044 , F15B11/08 , F15B13/043 , B66C23/36
摘要： The crane includes a swing brake device installed between a hydraulic motor and a control valve and having a flow restrictor; a first backpressure detector detecting a motor backpressure between the flow restrictor and one of ports of the hydraulic motor; a second backpressure detector detecting a motor backpressure between the flow restrictor and the other port of the hydraulic motor; and a control device. The control device has an external-force direction estimation unit that estimates a swing direction of an upperstructure under an external force acting on the upperstructure on the basis of a motor backpressure detected by the first backpuressure detector and a motor backpressure detected by the second backpressure during an operating state of the swing brake device. The control device has a notification control unit that causes the notification device to provide notification of the estimated swing direction of the upperstructure.
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公开(公告)号：US10125750B2
公开(公告)日：2018-11-13
申请号：US15205517
申请日：2016-07-08
发明人： Joe Pfaff , Bradley Kramer , Dwight Stephenson , Eric Hamkins
IPC分类号： F04B1/053 , F04B1/04 , F04B49/22 , F04B53/16 , F15B11/08 , F15B11/16 , E02F9/22 , F04B1/06 , F04B49/00
摘要： A system and method for machinery performing work with hydraulic actuators. Radial hydraulic pumps are aligned end-to-end along a common driveshaft axis to form a multi-pump assembly having a plurality of piston/cylinder units extending in a radial direction. Two or more piston/cylinder units are associated with one another to form multiple piston/cylinder groups. A plurality of control valves combines individual output flows from the two or more associated piston/cylinder units into respective common output flows for each respective piston/cylinder group. A plurality of flow control devices varies the common output flow from each respective piston/cylinder group by throttling inlet flow to the two or more associated piston/cylinder units in each respective piston/cylinder group. Each respective common output flow is directed from each respective piston/cylinder group to a hydraulic actuator on the heavy machinery to control its direction of movement.
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公开(公告)号：US20180319634A1
公开(公告)日：2018-11-08
申请号：US15522105
申请日：2015-10-30
发明人： Zenghai Shan , Xiaodong Hu , Guowang Jiao , Bin Zhou , Conglin Yuan
CPC分类号： B66C13/20 , B66D1/08 , F15B11/08 , F15B13/0417 , F15B13/16
摘要： The present application relates to a crane hydraulic system and a controlling method of the system, wherein the crane hydraulic system includes a load sensing subsystem, and the subsystem includes a variable pump, a variable pump oil inlet line, a load feedback line, an oil return line and a pressure compensator; the pressure compensator is provided with an oil inlet, an oil outlet, a first control oil port, a second control oil port and a control spring; the oil inlet communicates with the variable pump oil inlet line, the oil outlet communicates with the oil return line, the first control oil port communicates with the load feedback line, and the second control oil port also communicates with the variable pump oil inlet line; and wherein the control spring and the first control oil port are located on the same end of the pressure compensator, and a set pressure of the control spring is greater than a pressure difference of the variable pump. According to the present application, since the load sensing subsystem is arranged, at the start and stop moments of a winch system, the pressure compensator can be opened, and the variable pump oil inlet line communicates with the oil return line to realize pressure relief, so as to reduce the pressure impact.
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公开(公告)号：US10106379B2
公开(公告)日：2018-10-23
申请号：US15485978
申请日：2017-04-12
发明人： Jann Reesing , Johannes Schuermann
摘要： The invention relates to a drive device for supplying power to multiple engine pumps (4, 5), provided in the superstructure (3) of a mobile crane for superstructure functions, by way of a drive motor (2) arranged in the undercarriage (1) of the mobile crane, comprising a hydraulic motor (7) which is arranged in the superstructure (3) and hydraulically driven by the drive motor (2) and which comprises a first mechanical output which couples at least one first engine pump (4) to the hydraulic motor (7) and a second mechanical output which couples at least one second engine pump (5) to the hydraulic motor (7). The invention also relates to a mobile crane comprising this drive device.
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公开(公告)号：US10100848B2
公开(公告)日：2018-10-16
申请号：US15098480
申请日：2016-04-14
摘要： A hydraulic actuator having a body defining a chamber, a piston rod including an annular groove and a piston head slidably housed within the chamber, the piston head having a number of segments each of which has a base portion mounted within the annular groove.
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公开(公告)号：US10100494B2
公开(公告)日：2018-10-16
申请号：US15235785
申请日：2016-08-12
申请人： Caterpillar Inc.
摘要： A system and method for controlling the swing of a machine is disclosed. The system may comprise a hydrostatic circuit that includes an electronic displacement control pump and a first swing motor fluidly connected in a closed loop circuit. The electronic displacement control pump configured to control the supply of fluid to the swing motor based on a final pump displacement command. The first swing motor configured to rotate the upper carriage of the machine. The hydrostatic circuit configured to control (a) an actual speed of the first swing motor when the final pump displacement command results from a requested swing motor speed and (b) a torque of the first swing motor when the final pump displacement command results from a requested swing motor torque.
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公开(公告)号：US10093516B2
公开(公告)日：2018-10-09
申请号：US15301478
申请日：2015-03-31
发明人： Thomas Kuczera , Walter Hoffmann
摘要： An elevator may include a braking device such as a safety gear system or a service brake, for instance. The braking device may include a hydraulically-acting brake for braking an elevator car of the elevator. The braking device may further include a hydraulic unit with a pump assembly, a brake cylinder assembly, and a valve assembly for ventilating the brake. Further, the hydraulic unit may be fastened to the braking device.
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公开(公告)号：US10087831B2
公开(公告)日：2018-10-02
申请号：US15209219
申请日：2016-07-13
申请人： IHI Corporation
摘要： Provided is an engine that includes a first member, a second member, a first hydraulic pressure chamber formed between facing parts of the first and second members, and a hydraulic pressure adjustment mechanism. The hydraulic pressure adjustment mechanism has a plunger pump having a pump cylinder and a plunger and configured to supply hydraulic oil in the pump cylinder to the first hydraulic pressure chamber by pushing the plunger into the pump cylinder. The plunger pump moves in a stroke direction along with a piston and a power transmission section, and the plunger is pushed into the pump cylinder by receiving a reaction force opposite to reciprocating forces of the piston and the power transmission section.
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公开(公告)号：US10066368B2
公开(公告)日：2018-09-04
申请号：US14761384
申请日：2014-01-16
IPC分类号： F15B11/024 , E02F9/22 , F15B11/08 , F15B21/14 , E02F9/20
摘要： The hydraulic fluid energy recovery apparatus includes a fluid communication line for holding a bottom-side hydraulic fluid chamber and a rod-side hydraulic fluid chamber of a hydraulic cylinder in fluid communication with each other, a fluid communication valve connected to the fluid communication line for adjusting the pressure and/or flow rate of a hydraulic fluid passing through the fluid communication line in a manner that allows for adjustment of a degree of opening of the fluid communication valve, first pressure detecting means for detecting a signal indicative of pressure at the bottom-side hydraulic fluid chamber of the hydraulic cylinder, an amount-of-operation detecting means for detecting an amount of operation of the operating means, and a control device for capturing the signal of pressure at the bottom-side hydraulic fluid chamber of the hydraulic cylinder detected by the first pressure detecting means.
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