公开(公告)号：US11933290B2

公开(公告)日：2024-03-19

申请号：US17886693

申请日：2022-08-12

Applicant: Caterpillar Inc.

Inventor： Arick Bakken ,  Paul John Cairns ,  William Christopher Swick

IPC: F04B1/324 ,  F04B1/146 ,  F04B1/188 ,  F04B49/06 ,  F04B49/12

CPC classification number: F04B49/065 ,  F04B1/146 ,  F04B1/188 ,  F04B1/324 ,  F04B49/12 ,  F04B2201/0201 ,  F04B2203/0201 ,  F04B2203/0209 ,  F04B2205/05

Abstract: An axial piston pump controller for an axial piston pump having a fixed valve plate and a variable displacement is provided. The axial piston pump controller is configured to determine a displacement of the axial piston pump, and to calculate a pump displacement control current to be supplied to the axial piston pump to control the displacement of the axial piston pump. Calculating the pump displacement control current comprises calculating a nominal value for the pump displacement control current based on a rotational speed of the axial piston pump, calculating a pump stiffness adjustment factor based on a pump stiffness control map having as inputs: an output pressure of the axial piston pump; and the estimated pump displacement, and calculating the pump displacement control current to be supplied to the axial piston pump based on the nominal value and the pump stiffness adjustment factor. The controller is further configured to output an instruction to output the calculated pump displacement control current to the axial piston pump in order to control the displacement of the axial piston pump.

公开(公告)号：US11674508B2

公开(公告)日：2023-06-13

申请号：US17840948

申请日：2022-06-15

Applicant: PDC MACHINES, INC.

Inventor： Chris Turner ,  Guy Babbitt ,  Alex Beckerman ,  Bryce Whitehill ,  Garrett Casassa

IPC: F04B45/053 ,  F04B45/04 ,  F04B53/06 ,  F04B53/14

CPC classification number: F04B45/0533 ,  F04B45/043 ,  F04B45/053 ,  F04B53/06 ,  F04B53/14 ,  F04B2201/0201 ,  F04B2201/0202 ,  F04B2205/05

Abstract: Devices and methods for operating a diaphragm compressor system provide high output pressure and high throughput. In some embodiments, modular diaphragm compressors are stacked with a clamping mechanism pressing the compressor modules together. In embodiments, multiple stacks are provided as stages of a pressurization process. In embodiments, a main stage valve controls one or more pressure circuits for one or more hydraulic actuators of compressor modules. In embodiments, orifices configured for damping are incorporated to control actuator piston movement within a compressor module.

公开(公告)号：US20230146011A1

公开(公告)日：2023-05-11

申请号：US17522896

申请日：2021-11-09

Applicant: PDC MACHINES INC.

Inventor： Guy Babbitt ,  Chris Turner ,  Bryce Whitehill ,  Nicholas Echter ,  Jeffrey Rogers ,  Michael Sprengel ,  Noah Schaich ,  Kevin Best ,  Kyle Palmiscno ,  Alex Beckerman ,  Kareem Afzal ,  Christopher Basilico ,  Carl T. Johnson

IPC: F04B45/053 ,  F04B49/22

CPC classification number: F04B45/0533 ,  F04B45/0536 ,  F04B49/22 ,  F04B2201/0201 ,  F04B2201/0202

Abstract: Devices and methods for operating a diaphragm compressor. Embodiments of the present disclosure comprise an oil piston being driven to pressurize work oil against the diaphragm of the compressor. In embodiments, an injection pump provides a supplemental flow of work oil in the region of pressurized fluid, and such pump may be part of an actively controlled system. In embodiments, a pressure relief valve vents an overpump flow of work oil, and such valve may be variable. Embodiments provide feedback and control mechanisms, including control of the injection pump and the relief valve.

公开(公告)号：US20180163712A1

公开(公告)日：2018-06-14

申请号：US15840396

申请日：2017-12-13

Applicant: Drägerwerk AG & Co. KGaA

Inventor： Hans-Ullrich HANSMANN

IPC: F04B43/04 ,  F04B53/10 ,  F04B53/14

CPC classification number: F04B43/04 ,  F04B17/03 ,  F04B49/06 ,  F04B53/1037 ,  F04B53/146 ,  F04B2201/0201 ,  F04B2203/0209 ,  F05C2251/02

Abstract: A chamber pump (10) and a method for operating same are provided. The chamber pump (10) includes a pump chamber (12), a chamber diaphragm (14) or a piston (34) as well as an axially movable driving rod (24) acting on the chamber diaphragm (14) or on the piston (34) for changing the volume of the pump chamber (12). The chamber pump (10) includes an electroactive diaphragm (40, 40′), which acts as an actuator for influencing an axial position of the driving rod (24) and acts on the driving rod (24), on the one hand, and on a housing of the pump (10), on the other hand. An electric potential is applied to the electroactive diaphragm (40, 40′) during the operation of the chamber pump (10) to influence an axial position of the driving rod (24) and to achieve a return stroke or a forward stroke of the chamber pump (10).

公开(公告)号：US20180100497A1

公开(公告)日：2018-04-12

申请号：US15290746

申请日：2016-10-11

Applicant: General Electric Company

Inventor： James Richard Zurlo ,  Sebastian Freund

IPC: F04B51/00 ,  F04B49/06 ,  F04B39/00 ,  G01F1/34

CPC classification number: F04B51/00 ,  F04B39/0005 ,  F04B49/065 ,  F04B2201/0201 ,  F04B2201/0206 ,  F04B2201/0601 ,  F04B2201/0604 ,  F04B2201/1208 ,  F04B2205/02 ,  F04B2205/09 ,  F04B2205/10 ,  G01F1/34

Abstract: Systems, methods, and non-transitory media for monitoring a reciprocating compressor determining a valve opening of a valve disposed in the reciprocating compressor using a sensor and determining a first location of a piston of the reciprocating compressor at the valve opening. The monitoring also includes determining a valve closing of the valve using the sensor and determining a second location of the piston at the valve closing. Furthermore, the monitoring includes estimating a volumetric efficiency based at least in part on the first and second location.

公开(公告)号：US09926878B2

公开(公告)日：2018-03-27

申请号：US15264635

申请日：2016-09-14

Applicant: DENSO CORPORATION

Inventor： Masahiko Suzuki

IPC: F02D41/38 ,  F04B19/22 ,  F02D41/30 ,  F02M59/02 ,  F02M59/46 ,  F04B49/06 ,  F04B49/22 ,  F04B7/00 ,  F04B9/04 ,  F04B53/00 ,  F04B53/10 ,  F02D41/20

CPC classification number: F02D41/38 ,  F02D41/3082 ,  F02D41/3845 ,  F02D2041/2003 ,  F02D2041/2037 ,  F02D2041/389 ,  F02D2200/0602 ,  F02D2200/501 ,  F02M59/022 ,  F02M59/368 ,  F02M59/466 ,  F04B7/0076 ,  F04B9/042 ,  F04B19/22 ,  F04B49/065 ,  F04B49/22 ,  F04B53/001 ,  F04B53/1032 ,  F04B2201/0201

Abstract: When a plunger of a high pressure pump is rising, a high pressure pump controller closes a regulator valve by energizing a solenoid of an electromagnetic actuator of the high pressure pump to discharge fuel into a delivery pipe. Further, this fuel discharge energization is stopped before the plunger reaches top dead center at a pump TDC timing. Further, a fuel pressure of the delivery pipe is detected at the pump TDC timing, and based on that detected value, a time Td from the pump TDC timing until a valve opening timing of the regulator valve is estimated. Once the estimated time Td elapses from the pump TDC timing, the solenoid is reenergized to removed a movement speed of a movable portion in a direction that pushes the regulator valve in an opening direction.

公开(公告)号：US20180051690A1

公开(公告)日：2018-02-22

申请号：US15785963

申请日：2017-10-17

Applicant: Jason STAIR ,  Anthony LINDSAY ,  Michael LEWIS ,  Raymond ZOWARKA ,  Siddharth PRATAP ,  Clay HEARN ,  Charles PENNEY ,  Michael WORTHINGTON ,  Hsing-Pang LIU

Inventor： Jason STAIR ,  Anthony LINDSAY ,  Michael LEWIS ,  Raymond ZOWARKA ,  Siddharth PRATAP ,  Clay HEARN ,  Charles PENNEY ,  Michael WORTHINGTON ,  Hsing-Pang LIU

IPC: F04B49/06 ,  F04B35/04 ,  F04B25/02 ,  F04B31/00

CPC classification number: F04B49/065 ,  F04B17/042 ,  F04B19/003 ,  F04B25/02 ,  F04B31/00 ,  F04B35/045 ,  F04B2201/0201 ,  F04B2201/0202 ,  F04B2203/0401

Abstract: A linear motor compressor including a compressor housing and a cylinder housing having a plurality of opposing compression chambers. A piston freely reciprocates within the cylinder housing using a linear electric motor. A piston position feedback control system provides adaptive current output as a function of position feedback and/or velocity feedback from the piston and/or the electric motor, to directly power and control the electric motor, wherein the piston reciprocates without assistance from a mechanical spring or other equivalent centering force.

公开(公告)号：US09878095B2

公开(公告)日：2018-01-30

申请号：US14746654

申请日：2015-06-22

Applicant: MEDTRONIC MINIMED, INC.

Inventor： Juan M. Alderete, Jr. ,  Matthew William Yavorsky ,  Jacob E. Pananen

IPC: A61M5/168 ,  A61M5/142 ,  F04B49/06 ,  F04B53/16 ,  F04B17/03 ,  F04B1/00 ,  F04B19/22 ,  F04B53/14 ,  F04B53/10 ,  F04B7/04 ,  F04B51/00

CPC classification number: A61M5/16831 ,  A61M5/14212 ,  A61M2005/16868 ,  A61M2005/16872 ,  F04B7/04 ,  F04B17/03 ,  F04B19/22 ,  F04B49/065 ,  F04B51/00 ,  F04B53/10 ,  F04B53/14 ,  F04B53/16 ,  F04B53/162 ,  F04B2201/0201 ,  F04B2201/02011

Abstract: A fluid infusion device includes a pump having a rotor and a stator. A rotor cam element rises from a reference surface of the rotor. The stator includes a cam element having a stator cam surface. The cam elements axially displace the rotor as the rotor revolves. Inlet and outlet valves open and close as a function of angular and axial position of the rotor. A motor actuates the rotor to pump fluid to a body, via a subcutaneous conduit. First and second contact elements are located on the rotor. A sensing element on the stator cooperates with a detection circuit to detect when the sensing element makes contact with the first sensor contact element and the second sensor contact element. The detection circuit monitors a detection signal obtained from the sensing element to determine an operating condition of the fluid pump mechanism.

公开(公告)号：US09795732B2

公开(公告)日：2017-10-24

申请号：US15229004

申请日：2016-08-04

Applicant: MEDTRONIC MINIMED, INC.

Inventor： Adam S. Trock ,  Hsiao-Yu S. Kow ,  Nichole R. Mattson ,  Steve Chow ,  Alexander S. Campbell

IPC: A61M5/142 ,  A61M5/168

CPC classification number: A61M5/14244 ,  A61M5/14236 ,  A61M5/16831 ,  A61M2205/3317 ,  A61M2205/3365 ,  A61M2205/50 ,  A61M2205/502 ,  A61M2205/581 ,  A61M2205/582 ,  A61M2205/583 ,  A61M2205/8212 ,  F04B2201/0201 ,  F04B2201/02011

Abstract: Apparatus are provided for infusion devices and related systems and operating methods. An exemplary system includes a motor, a sensing arrangement coupled to the motor to provide output indicative of a detected characteristic of the motor when the sensing arrangement is enabled, and a module coupled to the sensing arrangement to periodically enable the sensing arrangement while the motor is idle and detect potential unintended motion of the motor based on the output from the sensing arrangement while periodically enabling the sensing arrangement. In some embodiments, the motor includes a rotor configured such that its rotation provides translational displacement of a plunger in a fluid reservoir, and the sensing arrangement includes one or more sensors configured to provide output indicative of a detected magnetic field of the rotor magnet.

公开(公告)号：US09745975B2

公开(公告)日：2017-08-29

申请号：US14246779

申请日：2014-04-07

Applicant: Tundra Process Solutions Ltd.

Inventor： Kevin Dancek

IPC: F04B49/06 ,  E21B43/12 ,  F04B49/20 ,  F04B47/04

CPC classification number: F04B49/065 ,  E21B43/126 ,  F04B47/04 ,  F04B49/20 ,  F04B2201/0201 ,  F04B2201/121

Abstract: An artificial lifting system is disclosed. The artificial lifting system comprises an elongated cylinder fixed to a base or ground. The elongated cylinder receives a piston rod axially movable therein. The piston rod engages a downhole rod pump for driving the rod pump reciprocating uphole and downhole to pump downhole fluid to the surface. A control unit controls the axial movement of the piston rod, and automatically adjust the system operation to adapt to drift of the top and bottom stop positions of the piston rod. In an alternative embodiment, the system further comprises a dump valve controlled by the control unit to prevent over-stroke. In another embodiment, the system further comprises a chemical injection unit for injecting treatment fluid to a wellbore under the control of the control unit.