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公开(公告)号：US20240352951A1
公开(公告)日：2024-10-24
申请号：US18682369
申请日：2022-08-05
发明人： Myeongku YEO
CPC分类号： F15B13/06 , F15B13/025 , F15B2211/45
摘要： A hydraulic system according to an embodiment of the present invention comprises: a main hydraulic pump for discharging a hydraulic fluid; a plurality of driving apparatuses operating by receiving the hydraulic fluid; a parallel flow path through which the hydraulic fluid discharged by the main hydraulic pump flows; a plurality of control spools respectively connected to the parallel flow path in parallel to control the supply of hydraulic fluid to the plurality of driving apparatuses; and a plurality of electronic proportional decompression valves for adjusting a pilot pressure, applied to the respective control spools to be proportional to a current signal which has been input, wherein, if the plurality of control spools do not operate, the hydraulic fluid discharged by the main hydraulic pump is drained into an oil tank via the parallel flow path without passing through the plurality of control spools.
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公开(公告)号：US20240336466A1
公开(公告)日：2024-10-10
申请号：US18621780
申请日：2024-03-29
发明人： MARCO IOTTI
CPC分类号： B66F9/22 , B66F9/0655 , B66F9/0755 , F15B13/06 , F15B15/16
摘要： Described is a telescopic lifting arm (1) for self-propelled operating machines (10) comprising three tubular elements (21, 22, 23, 24, 25, 26), with a decreasing cross-section and telescopically connected to each other to define a supporting structure, designed to move between a retracted configuration wherein said tubular elements (21, 22, 23, 24, 25, 26) are inserted one in the other and an elongated configuration wherein two tubular elements are partly extracted. The arm (1) comprises actuator means (5) associated with the tubular elements (21, 22, 23, 24, 25, 26) and configured for actuating two tubular elements (21, 22, 23, 24 25, 26) for pulling them out independently from one other and with different speeds.
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公开(公告)号：US20240328436A1
公开(公告)日：2024-10-03
申请号：US18622719
申请日：2024-03-29
发明人： Lars HOFFMANN , Rolf GÖESSING , Martin HAMM
摘要： An apparatus and method for hydraulically powering at least one consumer of a hydraulic system of an aircraft is disclosed including a first electrical power source and a first electrically driven motor pump (MPU1) electrically powered by the first electrical power source, a second electrical power source and a second electrically driven motor pump (MPU2) electrically powered by the second electrical power source (B), and a hydraulic power generation control which controls a supply of electrical energy from the first and second electrical power sources to the first and second motor pumps (MPU1, MPU2). A method is disclosed for determining the actual available electrical power (APA, APB) of each of the first and second electrical power sources and to set a load factor (UPA, UPB) of each motor pump in order to share a load to generate hydraulic power demanded from the at least one consumer between the first and second motor pumps.
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公开(公告)号：US20240309892A1
公开(公告)日：2024-09-19
申请号：US18605955
申请日：2024-03-15
发明人： Erik Miller , David Manura , Florent Junod
摘要： A pneumatic circuit for a pneumatic drive apparatus is disclosed. The pneumatic circuit includes a reservoir, a pump, and first, second and third valves. The first valve selectively provides a fluid connection between an inlet of the pump and the reservoir. The second valve selectively provides a fluid connection between an outlet of the pump and the reservoir. The third valve selectively provides a fluid connection between the reservoir and an actuation port. The pneumatic circuit is configured such that the first and second valves can selectively pressurise the reservoir, and such that the third valve can selectively communicate pressure from the reservoir to the actuation port.
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公开(公告)号：US12085097B2
公开(公告)日：2024-09-10
申请号：US17781922
申请日：2020-12-03
发明人： Rupert Gappmaier , Florian Altenberger , Hans Knapp , Josef Stock , Alexis Dole , Callan Mackay
CPC分类号： F15B11/17 , E02F3/422 , E02F9/2225 , E02F9/225 , E02F9/2267 , E02F9/2292 , F15B13/06 , F15B2211/20576
摘要： The present invention relates to a switching valve block for a hydraulically actuable work machine that comprises a plurality of valve block inputs for a respective connection to a pressure output of one or more hydraulic fluid pumps, a plurality of valve block outputs for outputting a pressurized hydraulic fluid, and at least one valve that is arranged between valve block inputs and valve block outputs and is adapted to selectively produce a fluid connection between a first valve block input and a first valve block output or between a first valve block input and a second valve block output. The invention is characterized in that the first valve block output furthermore already has a fixed fluid connection to a second valve block input.
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公开(公告)号：US20240287949A1
公开(公告)日：2024-08-29
申请号：US18175120
申请日：2023-02-27
申请人： Woodward, Inc.
CPC分类号： F02K1/763 , F15B1/265 , F15B13/027 , F15B13/06 , F15B15/2815
摘要： The subject matter of this specification can be embodied in, among other things, an engine assembly having a nacelle partially surrounding an engine, and a thrust reverser having a first element movable relative to the nacelle between a stowed and deployed position, a first hydraulic actuator configured to move the first element between the stowed and deployed position, the first hydraulic actuator being connected to a fluid source and a return reservoir, and a second element movable between a stowed and deployed position, a second hydraulic actuator configured to move the second element between the stowed and deployed position, the second hydraulic actuator being connected to the fluid source and the return reservoir, and a fluid control system having a servo valve operable to selectively route fluid between the fluid source, the first hydraulic actuator, and the return reservoir, and a controller configured to operate the servo valve.
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公开(公告)号：US11975956B1
公开(公告)日：2024-05-07
申请号：US17021267
申请日：2020-09-15
发明人： Tim Ourada
IPC分类号： B66F9/22 , A01D34/00 , A01G23/081 , B66F9/065 , B66F9/075 , E01C19/22 , F15B11/16 , F15B13/06 , F15B21/02 , B66F11/04 , E02F3/38 , E02F3/80
CPC分类号： B66F9/22 , B66F9/0655 , B66F9/075 , B66F9/0759 , E01C19/22 , F15B11/16 , F15B13/06 , F15B21/02 , A01D34/001 , A01G23/081 , B66F11/046 , E01C2301/16 , E02F3/38 , E02F3/80 , F15B2211/20538 , F15B2211/6652
摘要： Disclosed are various embodiments, aspects and features a multifunction, intelligent telescoping boom system. The system may comprise a hydraulic circuit with a continuous, circulating flow through a circuit that includes a hydraulic pump and a configurable valve bank. Valves in the valve bank may be designated to given components of any of a multitude of implement attachments. In this way, the continuous flow of hydraulic fluid through the valve bank may be distributed, via the valves, to the hydraulic components of implements. Hydraulic flow in excess of the demand created by the hydraulic components moves on through the valve bank and returns to the pump to continue the circulation. Also returning to the pump from the valve bank is any hydraulic fluid returning to the valve bank from the hydraulic components. Advantageously, because the system provides a continuous circulation of pressurized hydraulic fluid through the bank, implements with a mix of linear and rotating hydraulic components may be simultaneously powered from the same source of pressurized flow.
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公开(公告)号：US20240140382A1
公开(公告)日：2024-05-02
申请号：US18383181
申请日：2023-10-24
发明人： Ashley Bidmead , Chris Wootton
摘要： A hydraulic brake system for activating the wheel brakes of an aircraft landing gear assembly includes a hydraulic fluid supply line and an associated return line. There is a valve which separates a source of hydraulic fluid from a portion of the return line and an associated leak path associated with the valve that in use maintains the pressure and/or volume of hydraulic fluid in the portion of the return line above a minimum acceptable level. The leak path may be provided by a hole drilled in a part (e.g. the poppet) of a non-return check valve.
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公开(公告)号：US11725724B2
公开(公告)日：2023-08-15
申请号：US17343933
申请日：2021-06-10
发明人： Eric Tryon , Charles F. Long , Bryan Hagelskamp
CPC分类号： F16H61/0021 , F15B11/20 , F15B13/06 , F16H61/0206 , F16H61/12 , F15B2211/71 , F16H2059/683 , F16H2061/026 , F16H2061/1204 , F16H2061/1292 , F16H2200/0065
摘要： An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
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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
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.
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