公开(公告)号：US20190186511A1

公开(公告)日：2019-06-20

申请号：US16218610

申请日：2018-12-13

申请人： Eaton Intelligent Power Limited

发明人： Michael Rannow

IPC分类号： F15B20/00 ,  F15B13/04 ,  F15B13/08 ,  F16K11/07 ,  F16K31/06 ,  G01M3/28 ,  G05D16/00

CPC分类号： F15B20/005 ,  F15B13/0402 ,  F15B13/0433 ,  F15B13/0435 ,  F15B13/0442 ,  F15B13/0446 ,  F15B13/086 ,  F15B20/008 ,  F15B2211/42 ,  F15B2211/857 ,  F16K11/07 ,  F16K31/0675 ,  G01M3/2876 ,  G05D16/028

摘要： Hydraulic systems and associated methods configured to reduce leakage past a spool valve when the system is in a neutral state. Leakage reduction is achieved by shifting the spool valve within the spool bore. The amount of shifting can be controlled by a pressure controller that sets one or pressures in the system and actively/dynamically adjusts the system to achieve a desired pressure or set of pressures by shifting the spool valve.

公开(公告)号：US10071709B2

公开(公告)日：2018-09-11

申请号：US14442569

申请日：2013-11-15

申请人： KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GMBH

发明人： Gerhardus De Vries ,  Gerd Noll ,  Wolfgang Maglot

IPC分类号： F15B20/00 ,  B60S1/10 ,  F15B15/06

CPC分类号： B60S1/10 ,  F15B15/065 ,  F15B20/008 ,  F15B2211/30565 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/7725 ,  F15B2211/8636 ,  F15B2211/8757 ,  F15B2211/8855

摘要： A pneumatic system for operating a drive for a windshield wiper for a rail vehicle, wherein the windshield wiper drive has a piston guide device that has a first connection and a second connection opposite the first connection. At least one piston in the piston guide device carries out linear movements in opposite directions along the main direction of extension of the piston guide device to bring about an alternating rotational movement of the wiper shaft. The pneumatic system has a supply connection for a compressed air supply, wherein the supply connection is connected to the first connection via a first normal operation connection line and a first emergency operation connection line arranged parallel thereto and to the second connection via a second normal operation connection line and a second emergency operation connection line arranged parallel thereto.

公开(公告)号：US09903098B2

公开(公告)日：2018-02-27

申请号：US14771393

申请日：2013-03-06

申请人： VOLVO CONSTRUCTION EQUIPMENT AB

发明人： Bo Vigholm

IPC分类号： F15B13/043 ,  E02F9/22 ,  F15B20/00 ,  B62D5/09 ,  F15B21/08 ,  E02F9/08

CPC分类号： E02F9/225 ,  B62D5/091 ,  E02F9/0841 ,  E02F9/226 ,  E02F9/2267 ,  E02F9/2285 ,  E02F9/2296 ,  F15B13/0433 ,  F15B20/008 ,  F15B21/087 ,  F15B2211/20546 ,  F15B2211/355 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7128 ,  F15B2211/8636 ,  F15B2211/8752

摘要： A pilot pressure control system for controlling a pilot signal pressure at a pilot inlet of a control valve includes a pilot outlet adapted to be connected to the pilot inlet. The pilot pressure control assembly further includes a first pilot valve assembly and a second pilot valve assembly. Each one of the first and second pilot valve assemblies are individually controllable so as to selectively provide a first fluid flow direction from a pressure line to the pilot outlet and a second fluid flow direction from the pilot outlet to a drain line. At least the first pilot valve assembly is adapted to assume a maximum pressure supply condition so as to supply a first pilot valve assembly maximum pressure to the pilot outlet. At least the second pilot valve assembly is adapted to provide a pressure drop from the pilot outlet to the drain line via the second pilot valve assembly. The pilot pressure control system is configured such that, when the pilot pressure control system is connected to the pressure and drain lines and when the first pilot valve assembly is controlled so as to assume the maximum pressure supply condition and the second pilot valve assembly provides a fluid flow in the second fluid direction with a minimum pressure drop, the pressure at the pilot outlet is equal to or above 20 of the first pilot valve assembly maximum pressure (Pmax).

公开(公告)号：US09890799B2

公开(公告)日：2018-02-13

申请号：US14785520

申请日：2014-04-21

申请人： Parker-Hannifin Corporation

发明人： Ralf Gomm ,  Christian Josefsson

IPC分类号： F15B20/00 ,  F15B11/00

CPC分类号： F15B11/003 ,  F15B20/008 ,  F15B2211/20515 ,  F15B2211/20561 ,  F15B2211/27 ,  F15B2211/30515 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/633 ,  F15B2211/6346 ,  F15B2211/6651 ,  F15B2211/8636

摘要： According to one aspect of the invention, a hydraulic system includes a controller connected to an operator interface, a pump operable in a first direction for supplying pressurized fluid, and a load-holding valve connected between the pump and a port for connection to an actuator. The load-holding valve may be controlled by the controller and operative in a first position to allow flow to the actuator to operate the actuator against a load and operative in a second position to block load-induced return flow from the actuator to the pump. The controller may be configured to receive a requested actuator stop, to control the first valve to move to the second position in response to the requested actuator stop, to monitor a first system condition in response to the requested actuator stop, to evaluate the monitored system condition with a prescribed criteria, and to determine whether or not to initiate a back-up control routine based on the evaluation.

公开(公告)号：US09880564B2

公开(公告)日：2018-01-30

申请号：US14843159

申请日：2015-09-02

申请人： Samson Aktiengesellschaft

发明人： David Wagner-Stuerz

IPC分类号： G05D7/06 ,  F15B5/00 ,  G05B15/02 ,  F15B20/00 ,  F15B19/00

CPC分类号： G05D7/0635 ,  F15B5/006 ,  F15B19/005 ,  F15B20/008 ,  F15B2211/30565 ,  F15B2211/3057 ,  F15B2211/6336 ,  F15B2211/6656 ,  F15B2211/7052 ,  F15B2211/7053 ,  F15B2211/863 ,  F15B2211/87 ,  F15B2211/8757 ,  F15B2211/8855 ,  G05B15/02

摘要： The position controller for a pneumatic field device comprises a current-pressure transducer system having at least two I/P-transducers creating separate pneumatic control signals. Microelectronics creates at least two electrical control signals for the I/P-transducers. A pneumatic signal switching valve has at least two pneumatic inputs for the at least two pneumatic control signals, a pneumatic output for transferring a pneumatic control signal to a working chamber of the pneumatic field device and an electrical switch signal input. The pneumatic signal switch valve comprises a first switch position which blocks a first of the at least two pneumatic control signals and a second switch position which blocks a second of the pneumatic control signals.

公开(公告)号：US20170356475A1

公开(公告)日：2017-12-14

申请号：US15620122

申请日：2017-06-12

申请人： BUERKERT WERKE GMBH & CO. KG

发明人： Thomas HAMM ,  Marc FISCHER

IPC分类号： F15B20/00 ,  F16K31/06

CPC分类号： F15B20/002 ,  F15B13/0857 ,  F15B13/086 ,  F15B13/0864 ,  F15B13/0867 ,  F15B20/008 ,  F16K31/0675

摘要： There is described a valve island base module (12, 14) with at least one valve module receptacle (25a-25h), which comprises means for the attachment of a plurality of valve modules (18a-18h) each including at least one electrically actuatable valve on the valve island base module (12, 14). In addition, the valve island base module (12, 14) has a fluidic and an electrical valve module connection (36a-36h) for the power supply of the valve modules (18a-18h) with electric current. A power supply line (30) is electrically connected with the electrical valve module connections (36a-36h). By means of a safety interface (26, 28) accessible from outside, the power supply of at least one electrical valve module connection (36a-36h) can selectively be interrupted. In addition, there is described a valve island (10) with at least one valve island base module (12, 14) and at least one valve module (18a-18h).

公开(公告)号：US20170350421A1

公开(公告)日：2017-12-07

申请号：US15615101

申请日：2017-06-06

申请人： Cowan Dynamics Inc.

发明人： Daniel Gagné

IPC分类号： F15B11/076 ,  F16K31/12

CPC分类号： F16K31/12 ,  F15B13/0814 ,  F15B20/008 ,  F15B2211/8752 ,  F16K27/003

摘要： A valve actuator control system, and a related manifold. The control system includes a pneumatic directional valve operable to move the actuator. The manifold has multiple internal channels and is mountable to the pneumatic directional valve in alternative connections so that one internal channel of the manifold is active and the others are non-active, so that the manifold and pneumatic directional valve can provide operability of the actuator in a plurality of different fail modes.

公开(公告)号：US09810329B2

公开(公告)日：2017-11-07

申请号：US14887513

申请日：2015-10-20

申请人： Danfoss Power Solutions ApS

发明人： Frede Callesen

IPC分类号： F15B11/16 ,  F16K11/06 ,  F15B20/00 ,  F16K27/04 ,  F16K31/02 ,  G05D7/06 ,  F15B13/08 ,  F15B19/00 ,  F15B13/04

CPC分类号： F16K11/06 ,  F15B11/161 ,  F15B11/165 ,  F15B13/086 ,  F15B19/005 ,  F15B20/008 ,  F15B2013/0413 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/857 ,  F15B2211/87 ,  F16K27/04 ,  F16K31/02 ,  G05D7/0635

摘要： A valve group includes an inlet module and at least one service module connected to the inlet module, the inlet module having a housing, a pressure port, a pressure gallery, a tank port, a tank gallery, a spool movable in the housing to interrupt in a first position a connection between the pressure port and the pressure gallery and to connect in a second position the pressure port and the pressure gallery. A first pressure transducer is provided to detect a first pressure in the pressure gallery and a second pressure transducer is provided to detect a second pressure in the tank gallery, the pressure transducers being connected to a controller determining the position of the spool based on the pressures read from the pressure transducers.

公开(公告)号：US09651068B2

公开(公告)日：2017-05-16

申请号：US14257126

申请日：2014-04-21

申请人： Ross Operating Valve Company

发明人： José Carlos Bento ,  Eric Oden Cummings

IPC分类号： F15B20/00 ,  F16K11/24 ,  F16P3/22

CPC分类号： F15B20/001 ,  F15B20/008 ,  F16K11/24 ,  F16P3/22 ,  Y10T137/86879 ,  Y10T137/87209

摘要： A double valve includes a first unitary valve assembly and a second unitary valve assembly. Each unitary valve assembly includes a first outlet port, a second outlet port, and a spool. A first pilot assembly and a second pilot assembly are coupled to the first unitary valve assembly and the second unitary valve assembly, respectively. A plate is coupled to the unitary valve assemblies and includes a passage to provide a first common outlet passage that is coupled to the respective first outlet ports of the unitary valve assemblies and a second common outlet passage that is coupled to the respective second outlet ports of the unitary valve assemblies. When the spools are in a first position, fluid flows through the first common outlet passage, and when the spools are in a second position, the fluid flows through the second common outlet passage.

公开(公告)号：US20170096908A1

公开(公告)日：2017-04-06

申请号：US15272871

申请日：2016-09-22

申请人： Elliott Company

发明人： William G. Pacelli ,  James F. Walsh

IPC分类号： F01D17/14 ,  F16K31/40 ,  F16K31/122 ,  F01D25/24 ,  F16K1/12

CPC分类号： F01D17/145 ,  F01D25/24 ,  F05D2220/31 ,  F05D2260/57 ,  F05D2260/83 ,  F15B11/10 ,  F15B19/005 ,  F15B20/008 ,  F15B2211/6336 ,  F15B2211/87 ,  F15B2211/8755 ,  F15B2211/8855 ,  F16K1/126 ,  F16K31/1221 ,  F16K31/406 ,  F16K37/0083

摘要： A pneumatic trip system for a turbine includes a valve member; a valve stem connected to the valve member; and an actuator assembly connected to the valve stem. The actuator assembly includes a cylinder; a piston connected to the valve stem, the piston dividing the cylinder into a first chamber and a second chamber; a biasing element disposed in the second chamber of the cylinder; and a pneumatic circuit in communication with the second chamber of the cylinder. The pneumatic circuit is configured to pressurize the second chamber of the cylinder to actuate the piston to move the valve stem and the valve member to an exercised position between the open position and the closed position while the first chamber is pressurized.