公开(公告)号：US20190194998A1

公开(公告)日：2019-06-27

申请号：US16329725

申请日：2017-08-21

申请人： Aventics GmbH

发明人： Norbert Fortmann ,  Tim Warning ,  Florent Orget

IPC分类号： E05F15/50 ,  F15B20/00

CPC分类号： E05F15/50 ,  E05Y2800/11 ,  E05Y2800/25 ,  E05Y2900/51 ,  F15B20/004 ,  F15B2211/30565 ,  F15B2211/3057 ,  F15B2211/40584 ,  F15B2211/41527 ,  F15B2211/7053 ,  F15B2211/8752 ,  F15B2211/8855 ,  F15B2211/895

摘要： The disclosure relates to a pneumatic control system for a working cylinder, which pneumatic control system enables resistance-free manual motion of the device driven by the working cylinder in the event of a failure or switch-off of the compressed air supply and is independent of electrical supply. The problem is solved by means of a pneumatic control system having a double-acting working cylinder, the two chambers of which can be connected oppositely to a compressed air source and a compressed air outlet by means of a controllable supply device having two operating positions, an independently resetting 3/2-way valve switchable by means of a control pressure being arranged before each chamber in a connecting line to the supply device, which 3/2-way valves connect the chambers to bleeding outlets in a first switching position and to the supply device in a second switching position, and a parallel circuit of a check valve and a throttle point being arranged before each chamber, the check valves of which parallel circuits block in the backflow direction, wherein the two 3/2-way valves assume the first switching position in the idle position and can be switched by means of a common control line, which is connected to both connecting lines to the supply device downstream of the 3/2-way valves by means of a changeover valve, and the parallel circuits are arranged in the connecting lines downstream of the respective 3/2-way valves.

公开(公告)号：US20180222465A1

公开(公告)日：2018-08-09

申请号：US15426619

申请日：2017-02-07

申请人： New York Air Brake, LLC

发明人： Derick Call

IPC分类号： B60T15/04 ,  B60T15/02

CPC分类号： B60T15/048 ,  B60T15/021 ,  B60T15/041 ,  B60T17/085 ,  B60T17/16 ,  F15B2211/30505 ,  F15B2211/30565 ,  F15B2211/329 ,  F15B2211/365 ,  F15B2211/511 ,  F15B2211/5158 ,  F15B2211/528 ,  F15B2211/555 ,  F15B2211/7052

摘要： A control valve for an automatic parking brake having an inlet for coupling to a source a brake pipe pressure, an outlet for coupling to a control inlet of the automatic parking brake and a pilot for coupling to the source of brake pipe pressure. The control valve is moveable between a first position where the inlet is in communication with the outlet and a second position where the inlet and the outlet are isolated from each other in response to a predetermined amount of brake pipe pressure at the pilot. The control valve includes a spring biasing the control valve into the first position.

公开(公告)号：US09932995B2

公开(公告)日：2018-04-03

申请号：US15028866

申请日：2014-10-10

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Akihiro Kondo ,  Makoto Ito ,  Kazuto Fujiyama

IPC分类号： E02F9/22 ,  F15B11/17 ,  E02F3/42 ,  E02F3/43 ,  E02F3/32 ,  E02F9/12

CPC分类号： F15B11/17 ,  E02F3/32 ,  E02F3/425 ,  E02F3/435 ,  E02F9/123 ,  E02F9/2235 ,  E02F9/2242 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20576 ,  F15B2211/30565 ,  F15B2211/31582 ,  F15B2211/6316 ,  F15B2211/665 ,  F15B2211/782

摘要： A hydraulic excavator drive system includes: a first hydraulic pump and a second hydraulic pump, whose respective tilting angles are controllable independently of each other; an arm main control valve and an arm auxiliary control valve each for controlling supply of hydraulic oil to an arm cylinder; and a boom main control valve and a boom auxiliary control valve each for controlling supply of the hydraulic oil to a boom cylinder. An arm operation valve outputs a pilot pressure to the arm main control valve. A boom operation valve outputs a pilot pressure to the boom main control valve. A pair of arm-side regulating valves outputs no pilot pressure to the arm auxiliary control valve and a boom-side regulating valve outputs no pilot pressure to the boom auxiliary control valve when an arm crowding operation and a boom raising operation are performed concurrently.

公开(公告)号：US20180051444A1

公开(公告)日：2018-02-22

申请号：US15554533

申请日：2016-05-26

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Ryohei YAMASHITA ,  Shinya IMURA ,  Kouji ISHIKAWA ,  Hidekazu MORIKI ,  Hiroaki AMANO

IPC分类号： E02F9/22 ,  F15B11/04 ,  F15B11/10

CPC分类号： E02F9/2228 ,  E02F9/2235 ,  E02F9/2253 ,  E02F9/226 ,  E02F9/2296 ,  E02F9/268 ,  F15B11/04 ,  F15B11/044 ,  F15B11/10 ,  F15B19/005 ,  F15B20/00 ,  F15B2211/30565 ,  F15B2211/31558 ,  F15B2211/329 ,  F15B2211/353 ,  F15B2211/355 ,  F15B2211/40515 ,  F15B2211/41581 ,  F15B2211/426 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6355 ,  F15B2211/665 ,  F15B2211/6654 ,  F15B2211/761 ,  F15B2211/862

摘要： Disclosed is a hydraulic control system of a construction machine capable of achieving a reduction in meter-out pressure loss in accordance with variation of a negative load acting on a hydraulic actuator and capable of preventing deterioration in operability even when an abnormal condition arises in a pressure sensor detecting the magnitude of a negative load. There are provided meter-out flow lines through which a hydraulic fluid discharged from a hydraulic actuator flows; variable restrictors provided in the meter-out flow lines; a load sensor detecting the magnitude of a negative load which is a load applied to the hydraulic actuator by an external force and which is a load in the same direction as the operating direction of the hydraulic actuator; and a control device which, when the load abnormality sensor does not detect any abnormality in the load sensor, reduces the sum total of the opening areas of the variable restrictors in accordance with an increase in the magnitude of the negative load detected by the load sensor and the operation amount detected by the operation amount sensor and which, when the load abnormality sensor detects abnormality in the load sensor, reduces the sum total of the opening areas of the variable restrictors to a predetermined value in accordance with the operation amount detected by the operation amount sensor.

公开(公告)号：US20180022440A1

公开(公告)日：2018-01-25

申请号：US15214366

申请日：2016-07-19

申请人： The Boeing Company

发明人： Derek M. Joseph ,  Kevin B. Eck ,  Christopher D. Feet ,  Yonas T. Meshesha ,  Timothy J. Soderquist ,  Barry D. Hance

IPC分类号： B64C13/40 ,  F15B13/04 ,  F15B13/042 ,  F15B11/08

CPC分类号： B64C13/40 ,  B64C5/02 ,  B64C5/10 ,  F15B11/08 ,  F15B2211/30565 ,  F15B2211/3111 ,  F15B2211/327 ,  F15B2211/329 ,  F15B2211/411 ,  F15B2211/41509 ,  F15B2211/428 ,  F15B2211/634 ,  F15B2211/7058 ,  F15B2211/715 ,  F15B2211/765

摘要： Systems and methods are provided for a hydraulic stabilizer trim actuator (HSTA). The HSTA may operate one or more movable control surfaces. The HSTA operate responsive to commands issued by the pilot and/or by a controller and may include hydraulic architecture that minimizes the probability of an un-commanded movement or movement in the opposite direction of such commands.

公开(公告)号：US20170328383A1

公开(公告)日：2017-11-16

申请号：US15526894

申请日：2015-06-09

申请人： Festo AG & Co. KG

发明人： Bodo Neef

IPC分类号： F15B13/04 ,  F15B13/08 ,  F15B21/04 ,  F15B13/043 ,  F15B13/00

CPC分类号： F15B13/0405 ,  F15B13/0431 ,  F15B13/0857 ,  F15B13/0875 ,  F15B13/0889 ,  F15B21/044 ,  F15B2013/006 ,  F15B2211/30565 ,  F15B2211/6306 ,  F15B2211/857 ,  F15B2211/8623 ,  F15B2211/87 ,  F15B2211/8752 ,  F15B2211/8855

摘要： A valve arrangement for a fluidic supply of a fluid load, with several main valves designed for influencing fluid flows at the fluid ports, and with electrically controllable pilot valves designed for fluidic control of the main valves. A base body is assigned a connection plate lying opposite a connection face and having a fluid passage which leads into an operating port for the connection of a fluid load wherein, between the connection face and the connection plate there is provided a separate passage body which has at least one connection passage for a fluidically communicating link between at least one of the fluid ports and the operating port, and at least one connecting conduit for a fluidic coupling of at least two fluid ports.

公开(公告)号：US20170314586A1

公开(公告)日：2017-11-02

申请号：US15524067

申请日：2015-11-19

申请人： KYB Corporation

发明人： Masahiro EGAWA ,  Haruhiko KAWASAKI ,  Yasuhiro YONEHARA ,  Masayuki KOBAYASHI

IPC分类号： F15B21/14 ,  E02F9/22 ,  H02J7/14

CPC分类号： F15B21/14 ,  E02F9/2217 ,  E02F9/2225 ,  E02F9/2228 ,  E02F9/2267 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/30565 ,  F15B2211/31558 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/41581 ,  F15B2211/426 ,  F15B2211/761 ,  F15B2211/88 ,  H02J7/14

摘要： A control system of a hybrid construction machine includes fluid pressure pumps configured to supply a working fluid to a fluid pressure actuator, a regeneration unit having a regeneration motor for regeneration to be rotated by the working fluid discharged from a load side pressure chamber of the fluid pressure actuator, a rotating electric motor coupled to the regeneration motor, and a storage battery configured to store electric power generated by the rotating electric motor, and a variable throttle configured to bleed a portion of the working fluid obtained by excluding a flow rate of the working fluid guided to the regeneration motor from the working fluid discharged from the load side pressure chamber.

公开(公告)号：US20170292540A1

公开(公告)日：2017-10-12

申请号：US15634219

申请日：2017-06-27

申请人： KUBOTA CORPORATION

发明人： Yuji FUKUDA ,  Kazuyoshi ARII ,  Hiroaki NAKAGAWA

IPC分类号： F15B13/042 ,  F15B11/08 ,  E02F3/43 ,  F15B21/04 ,  E02F9/22 ,  F15B1/26 ,  F15B13/04

CPC分类号： F15B13/0426 ,  E02F3/3414 ,  E02F3/431 ,  E02F9/166 ,  E02F9/22 ,  E02F9/226 ,  E02F9/2275 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/26 ,  F15B11/08 ,  F15B13/0401 ,  F15B21/042 ,  F15B2211/20576 ,  F15B2211/30565 ,  F15B2211/411 ,  F15B2211/41581 ,  F15B2211/428 ,  F15B2211/62 ,  F16H61/4035 ,  F16H61/433 ,  F16H61/44

摘要： A hydraulic system for a work machine includes a tank to store an operation fluid, a hydraulic device to be operated by the operation fluid, a control valve to control the hydraulic device, a first fluid tube connecting the hydraulic device and the control valve, the first fluid tube being to supply the operation fluid from the control valve to the hydraulic device, a second fluid tube branching from the first fluid tube and connected to the tank, a switch valve provided to the second fluid tube, the switch valve being to control a flow rate of the operation fluid, and an oil cooler provided to the second fluid tube between the switch valve and the tank.

公开(公告)号：US20170198829A1

公开(公告)日：2017-07-13

申请号：US14992274

申请日：2016-01-11

申请人： Hassan Abdullah Ahmad Alkandari

发明人： Hassan Abdullah Ahmad Alkandari

IPC分类号： F16K37/00

CPC分类号： F16K37/00 ,  F15B1/00 ,  F15B19/00 ,  F15B2211/30565 ,  F15B2211/31558 ,  F15B2211/31576 ,  F15B2211/327 ,  F15B2211/6336 ,  F15B2211/7052 ,  F15B2211/855 ,  F15B2211/8855 ,  F16K37/0083

摘要： An emergency shut-off valve and means for initiating a test on said emergency shut-off valve includes a source of pressurized gas, a main solenoid responsive to a signal from said means for initiating a test and a source of pressurized gas are included. Further, means including a main solenoid responsive to a signal from said means for initiating a test and a main solenoid valve and a quick exhaust valve connected to the source of pressurized gas. Further, a pneumatic actuator for opening and closing the shut-off valve and test means for testing the emergency shut-off valve without fully closing the emergency shut-off valve in response to a signal from the means for initiating a test. The test means includes a second solenoid.

公开(公告)号：US09644649B2

公开(公告)日：2017-05-09

申请号：US14213305

申请日：2014-03-14

申请人： Caterpillar Global Mining LLC

发明人： John Ferraz, Jr. ,  Brandon Z. Barnes

IPC分类号： F16D31/02 ,  F15B21/04 ,  E02F3/42 ,  E02F9/22

CPC分类号： F15B21/047 ,  E02F3/425 ,  E02F9/2239 ,  E02F9/226 ,  E02F9/2285 ,  E02F9/2292 ,  F15B2211/20576 ,  F15B2211/30565 ,  F15B2211/30575 ,  F15B2211/3058 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/7053 ,  F15B2211/857 ,  F15B2211/8609

摘要： A void protection system includes a valve assembly, a second fluid source configured to provide hydraulic fluid to the hydraulic cylinder, an auxiliary valve configured to fluidly connect the hydraulic cylinder to the second fluid source, a sensor assembly, and a controller. The controller is configured to monitor fluid pressure within the hydraulic cylinder based on signals from the sensor assembly, based on a determination that pressure in a rod end or a head end of the hydraulic cylinder is below a first fluid pressure threshold, configure the valve assembly to fluidly connect the corresponding end to the first fluid source, and if the first fluid source is not operational, increase an opening of the auxiliary valve to fluidly connect the corresponding end to the second fluid source and cause the second fluid source to provide fluid until pressure in the corresponding end is above a second fluid pressure threshold.