公开(公告)号：US20240159253A1

公开(公告)日：2024-05-16

申请号：US18545713

申请日：2023-12-19

Applicant: Purdue Research Foundation

Inventor： Andrea Vacca ,  Shaoyang Qu

IPC: F15B11/024

CPC classification number: F15B11/024 ,  F15B2211/20515 ,  F15B2211/20538 ,  F15B2211/20569 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/615 ,  F15B2211/6651 ,  F15B2211/6658 ,  F15B2211/7053

Abstract: An electro-hydraulic actuator system includes a fixed-displacement hydraulic pump and a variable speed electric motor configured in combination to constitute an individual electro-hydraulic unit that is coupled to an actuator, and a bypass valve in parallel to the actuator. The system is configured to enable the actuator to be operated at actuation speeds that are higher than a maximum actuation capability of the pump at the maximum flow capability thereof, and at actuation speeds that are lower than a minimum actuation capability of the pump at the minimum flow capability thereof. The actuation velocity of the actuator may be controlled by controlling the speed of the electro-hydraulic unit and a size of an opening of the bypass valve.

公开(公告)号：US11975956B1

公开(公告)日：2024-05-07

申请号：US17021267

申请日：2020-09-15

Applicant: Teletrax Equipment, LLC

Inventor： Tim Ourada

IPC: 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 classification number: 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

Abstract: 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.

公开(公告)号：US11858171B2

公开(公告)日：2024-01-02

申请号：US17388809

申请日：2021-07-29

Applicant: Oshkosh Corporation

Inventor： Yanming Hou ,  Loren G. DeVries ,  Rongjun Zhang ,  Jeremy Andringa

IPC: B28C5/00 ,  B28C5/42 ,  F15B11/17 ,  F15B7/00

CPC classification number: B28C5/4213 ,  B28C5/4217 ,  F15B11/17 ,  F15B7/006 ,  F15B2211/20515 ,  F15B2211/20523 ,  F15B2211/20538 ,  F15B2211/20576 ,  F15B2211/327

Abstract: A drum drive system includes a controller configured to selectively control an engine, a variable displacement pump, and a variable displacement motor of a vehicle to provide a target drum speed for a drum of the vehicle. To provide the target drum speed, the controller is configured to: (i) initially operate the variable displacement motor at a maximum motor displacement and operate the variable displacement pump at a pump displacement that provides the target drum speed without needing to actively manipulate an engine speed of the engine; (ii) increase the pump displacement and decrease a motor displacement without needing to actively manipulate the engine speed while still providing the target drum speed; and (iii) increase the engine speed in response to the pump displacement reaching a maximum pump displacement and the motor displacement reaching a minimum motor displacement if necessary to maintain the target drum speed.

公开(公告)号：US20180372127A1

公开(公告)日：2018-12-27

申请号：US16063287

申请日：2016-12-16

Applicant: WALVOIL S.P.A.

Inventor： Ulderico BUSANI ,  Daniele DODI ,  Massimiliano MUSIANI

IPC: F15B11/17

CPC classification number: F15B11/17 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30555 ,  F15B2211/30595 ,  F15B2211/3116 ,  F15B2211/7142

Abstract: A modular directional valve with two or more elements (E1, E2, E3, E4) in turn connectable to respective utilities (U) through the uses (A1, B1, A2 . . . B4); of which one or more elements (E1 E2) are of the CA type while one or more elements are of LS flow sharing type (E3, E4). The valve designed to be connected to a first high pressure line P1 which connects the crossing elements to a constant displacement pump (PA) and a second high pressure line P2 which connects the LS flow sharing type elements to a variable displacement pump LS, the connection to a low pressure line, the connection to a load sensing signal line (LS2) with the variable displacement pump LS (PB). Said valve acting so that if the load sensing flow sharing elements (E3, E4) fed by the line (P2) designed for the connection with the pump (PB) are in saturation, it withdraws from the carry over (6) of the group of elements (E1, E2) of the crossing type the amount of flow rate equal to the difference between the flow rate required by the utilities (U) of the elements (E3, E4) and the maximum flow rate which can be supplied by the LS pump (PB); otherwise, it freely delivers the flow rate of the constant displacement pump to the low pressure line.

公开(公告)号：US20180149175A1

公开(公告)日：2018-05-31

申请号：US15364662

申请日：2016-11-30

Applicant: Schlumberger Technology Corporation

Inventor： James Zapico

IPC: F15B13/04 ,  E21B19/14 ,  F15B11/08 ,  G05B15/02

CPC classification number: F15B13/0401 ,  E21B19/14 ,  F15B11/08 ,  F15B11/13 ,  F15B2211/20538 ,  F15B2211/30525 ,  F15B2211/30565 ,  F15B2211/30595 ,  F15B2211/31535 ,  F15B2211/31547 ,  F15B2211/50581 ,  F15B2211/6303 ,  F15B2211/6336 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/85 ,  F15B2211/895 ,  G05B15/02

Abstract: Apparatus and methods for metering fluid to a fluid actuator. An example apparatus may include a hydraulic actuator and a fluid chamber. The fluid chamber may include a piston slidably movable between first and second ends of the fluid chamber and dividing the chamber into first and second chamber portions, a first port extending into the first chamber portion, and a second port extending into the second chamber portion. The apparatus may further include a hydraulic directional control valve operable to direct a fluid from a fluid source into one of the first and second ports to cause a volume of fluid to be discharged out of the other of the first and second ports into the hydraulic actuator to actuate the hydraulic actuator by a distance corresponding to the volume of fluid received by the hydraulic actuator.

公开(公告)号：US09976576B2

公开(公告)日：2018-05-22

申请号：US13279939

申请日：2011-10-24

Applicant: Jerry J. Brittan ,  Graeme Andrew Jackson

Inventor： Jerry J. Brittan ,  Graeme Andrew Jackson

IPC: F15B11/17 ,  F16H61/02 ,  F16D48/02 ,  F16H61/00

CPC classification number: F15B11/17 ,  F15B2211/20538 ,  F15B2211/20592 ,  F15B2211/2654 ,  F15B2211/30505 ,  F15B2211/41518 ,  F15B2211/5152 ,  F15B2211/611 ,  F15B2211/615 ,  F15B2211/62 ,  F15B2211/7142 ,  F16D48/02 ,  F16D2048/0242 ,  F16D2048/0281 ,  F16D2048/029 ,  F16H61/0025 ,  F16H61/0206 ,  Y10T137/0318 ,  Y10T137/0396 ,  Y10T137/86163

Abstract: Disclosed is an exemplary hydraulic system including a first fluid circuit and a first pump fluidly connected to the first fluid circuit. The first pump configured to produce a fluid output at a first flow rate when operated at a selected speed. The hydraulic system further includes a second fluid circuit and a second pump selectively fluidly connectable to the first fluid circuit and the second fluid circuit. The second pump configured to produce a fluid output at a second flow rate when operated at the selected speed, with the second flow rate being greater than the first flow rate of the first pump. A first valve fluidly connects the second pump to the first fluid circuit when the first valve is arranged in an open position, and fluidly connects the second pump to second fluid circuit when the first valve is arranged in a closed position.

公开(公告)号：US09850885B2

公开(公告)日：2017-12-26

申请号：US14364177

申请日：2012-12-12

Applicant: YANMAR CO., LTD.

Inventor： Kunihiko Sakamoto

IPC: F04B1/32 ,  F04B17/05 ,  F04B49/08 ,  F04B49/06 ,  F15B20/00 ,  F15B11/042 ,  E02F9/20 ,  E02F9/22 ,  F04B49/20 ,  F04B1/29

CPC classification number: F04B1/324 ,  E02F9/2079 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/226 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F04B1/29 ,  F04B1/32 ,  F04B17/05 ,  F04B49/065 ,  F04B49/08 ,  F04B49/20 ,  F04B2203/0209 ,  F15B11/0423 ,  F15B20/007 ,  F15B2211/20523 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30595 ,  F15B2211/50518 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/526 ,  F15B2211/55 ,  F15B2211/633 ,  F15B2211/6346 ,  F15B2211/6652 ,  F15B2211/86

Abstract: A working vehicle provided with a fixed-capacity hydraulic pump driven by power from an engine and a working hydraulic actuator driven by working oil pumped from the fixed-capacity hydraulic pump is a rotary working vehicle which is provided with an electromagnetic relief valve for modifying the pressure of working oil from the fixed-capacity hydraulic pump, and the rotary working vehicle is such that if the actual number of revolutions (N) of the engine is reduced by a set number of revolutions (Ns) as the load on the engine increases, then the electromagnetic relief valve operates in accordance with the deviation (e) between the actual number of revolutions (N) of the engine and the specified number of revolutions (Ns), and the pressure of the working oil from the fixed-capacity hydraulic pump is modified.

公开(公告)号：US09845812B2

公开(公告)日：2017-12-19

申请号：US14649598

申请日：2013-12-04

Applicant: ARBURG GMBH + CO. KG

Inventor： Herbert Kraibuhler ,  Eberhard Duffner

IPC: F15B11/04 ,  F15B21/08 ,  F16L55/04 ,  F15B21/00 ,  B29C45/82 ,  G05D16/20

CPC classification number: F15B11/04 ,  B29C45/82 ,  F15B21/008 ,  F15B21/08 ,  F15B2211/20515 ,  F15B2211/20538 ,  F15B2211/6309 ,  F15B2211/633 ,  F15B2211/6333 ,  F15B2211/6336 ,  F15B2211/6651 ,  F15B2211/6653 ,  F15B2211/8613 ,  F15B2211/8616 ,  F16L55/041 ,  G05D16/2066

Abstract: In a method for operating a hydraulic device for providing a supply to hydraulic consumers (V) on a plastics injection moulding machine, provision is made of a pump (10) with a volumetric delivery characteristic that results in cyclic pulsations and of a servomotor (11) with multiple poles that result in cyclic pulsations. The pressure at the hydraulic consumer (V) is detected and is input as an actual value into a pressure regulator (13) that readjusts the servomotor (11), on the basis of a predefined pressure profile, to a pressure setpoint value at the hydraulic consumer (V). The cyclic pressure pulsation is minimized in that, by means of a rotational angle sensor (20), the rotational angle (φ) of the pump (10) and/or of the servomotor (11) is detected and correlated with the cyclic pulsations, and in that, from this, a corrective value or a corrective function is determined and is transmitted to the pressure regulator (13) with control subordinate to the regulation of the pressure setpoint value. Alternatively or in addition, this is achieved in the case of a hydraulic device also in that, as corrective means for the pressure regulation, said means being subordinate to the consideration of the pulsations, the number of components of the pump (10) that result in the cyclic pulsations and the number of components of the servomotor (11) that generate cyclic pulsations are equal, or one is a multiple of the other.

公开(公告)号：US09771957B2

公开(公告)日：2017-09-26

申请号：US14857180

申请日：2015-09-17

Applicant: Voith Patent GmbH

Inventor： Anton Maier

IPC: F16D31/02 ,  F15B15/14 ,  F15B11/036 ,  F15B11/02 ,  B30B15/16

CPC classification number: F15B15/1447 ,  B30B15/161 ,  F15B11/022 ,  F15B11/0365 ,  F15B2211/20515 ,  F15B2211/20538 ,  F15B2211/20561 ,  F15B2211/27 ,  F15B2211/7054 ,  F15B2211/7056 ,  F15B2211/7107 ,  F15B2211/775

Abstract: A hydraulic drive, preferably for a hydraulic press, having a first synchronized cylinder that comprises a piston between first and second pressure chambers; at least one hydraulic pump whereby the pump outlet is hydraulically connected with the first pressure chamber of the first synchronized cylinder and the pump inlet is hydraulically connected with the second pressure chamber of the first synchronized cylinder; at least a second synchronized cylinder that comprises a piston between first and a second pressure chambers; whereby the piston of the first synchronized cylinder is mechanically movably coupled with the piston of the second synchronized cylinder; whereby the first pressure chamber of the second synchronized cylinder is hydraulically connected with the pump outlet; and whereby the second pressure chamber of the second synchronized cylinder can be connected with the pump inlet when a pressure limit in the second pressure chamber of the second synchronized cylinder is exceeded.

公开(公告)号：US09695841B2

公开(公告)日：2017-07-04

申请号：US14398476

申请日：2013-03-29

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Tsutomu Udagawa ,  Hiroaki Tanaka

IPC: F15B9/04 ,  E02F9/20 ,  E02F9/22 ,  F15B7/00 ,  F15B11/024

CPC classification number: F15B9/04 ,  E02F9/2095 ,  E02F9/2217 ,  E02F9/2235 ,  E02F9/2242 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B7/006 ,  F15B11/024 ,  F15B2211/20515 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/20576 ,  F15B2211/253 ,  F15B2211/265 ,  F15B2211/27 ,  F15B2211/625 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/6652 ,  F15B2211/7053 ,  F15B2211/88

Abstract: In a hydraulic closed circuit system with hydraulic pumps which maintains a well-balanced flow rate by automatically controlling the flow rate, a first hydraulic pump is connected to a hydraulic cylinder device such that the hydraulic closed circuit is made, a second hydraulic pump is connected at one of paired delivery ports to a bottom side of the hydraulic cylinder device and at the other of the ports to a tank, and a prime mover drives the first and second hydraulic pumps and recovers motive power from these pumps. A pump capacity control unit detects a moving direction of the hydraulic cylinder device, and a pressure in a lower-thrust side of the device, and controls a capacity of the second hydraulic pump so that the flow rate during the extension/retraction of the hydraulic cylinder device becomes balanced between the first and second hydraulic pumps and the hydraulic cylinder device.