公开(公告)号：US10598173B2

公开(公告)日：2020-03-24

申请号：US15575510

申请日：2016-06-17

Applicant: CASAPPA S.P.A.

Inventor： Antonio Lettini

IPC: F04B49/00 ,  F04B1/2078 ,  F04B1/324 ,  F04B49/06 ,  F04B49/12

Abstract: A variable displacement pump comprising a pumping piston (10), cylinder head (2); a rotating shaft (3); regulating means (4) of the displacement of the pump, said means in turn comprising: a structure (41) having a variable inclination; a fluid-dynamic actuator (42) for regulating an inclination of said structure (41); command means (43) for the actuator (42), which assume a non-equilibrium and an equilibrium position, said command means (43) in turn comprising: a sliding body (431) being able to take at least a first position in which it places a chamber (420) acting on said actuator (42) in communication with a first zone (51) at least initially having a pressure that is different from a pressure present in said chamber (420); a sliding element (432) with respect to the sliding body (431) for resetting said equilibrium configuration, said sliding element (432) being distinct from said actuator (42) and being mechanically actuated in consequence of a variation of an inclination of said structure (41).

公开(公告)号：US10550933B2

公开(公告)日：2020-02-04

申请号：US15946880

申请日：2018-04-06

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Christian S. Daley ,  Nicholas Creager ,  Matt Dorenkamp ,  Eric R. Jacobson

IPC: F16H61/4026 ,  F16H61/4052 ,  F16H61/4104 ,  F16H61/4139 ,  F04B49/00

Abstract: A hydraulic system that has a hydraulic pump connected to and in communication with a hydraulic motor, at least one hydraulic cylinder, or both by a first conduit and a second conduit (i.e., a high side and a low side). The hydraulic system has a bypass valve connected to and in communication with the first conduit and the second conduit. The bypass valve has a preset pressure that is above a minimum low side pressure. When a shock load occurs in the hydraulic system and a related drop in pressure on the low side occurs, the bypass valve opens when the preset pressure is passed thereby preventing the pressure from dropping to the minimum low side pressure. The hydraulic system thereby avoids a low loop event that could cause damage to the hydraulic system without the presence of larger charge pumps or accumulators.

公开(公告)号：US10550673B2

公开(公告)日：2020-02-04

申请号：US16013408

申请日：2018-06-20

Applicant: Hydraulic Rod Pumps, International

Inventor： Christopher M. Hodges ,  Lance A. Mehegan ,  Timothy L. Hankerd ,  Nathan Terry ,  Walter Phillips

IPC: E21B43/12 ,  F04B17/05 ,  F04B47/04 ,  F04B19/22 ,  F04B23/02 ,  F04B49/00 ,  F04B49/22 ,  F04B47/02

Abstract: A hydraulic oil well pumping system is provided. The system uses a pump to exert hydraulic pressure against a reciprocating piston over a wellbore. The piston is connected to a rod string and downhole pump for pumping oil from a wellbore. The system includes an electronic control system that controls movement of the piston as it moves between the upper and lower rod positions by cycling the hydraulic system between (i) an “upstroke” condition wherein the pump is pumping oil through the oil line into the hydraulic cylinder to move the piston to its upper rod position, and (ii) a “neutral” condition wherein the pump is no longer pumping oil into the hydraulic cylinder, but is allowing oil to flow back through the oil line in response to gravitational fall of the piston. The control system is programmed to cycle based upon a volumetric calculation of hydraulic oil in the cylinder without reference to position sensors along the wellhead. Wellhead conditions or placement of the hydraulic cylinder inside the wellbore may prohibit attaching physical sensors at the wellhead. A method for pumping oil from a wellbore using such a system is also provided herein.

公开(公告)号：US10544783B2

公开(公告)日：2020-01-28

申请号：US16147188

申请日：2018-09-28

Applicant: I-JACK TECHNOLOGIES INCORPORATED

Inventor： Dan McCarthy

IPC: F04B49/00 ,  F04B35/00 ,  F04B47/04 ,  F04B27/02 ,  F04B9/113 ,  E21B43/12 ,  F04B49/12 ,  E21B4/00

Abstract: Methods and systems are provided to adaptively control a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor, the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes. During a first stroke of the piston, a speed of the piston, a temperature of the driving fluid, and a load pressure applied to the piston is monitored. Reversal of the driving force after the first stroke is controlled based on the speed, load pressure, and temperature.

公开(公告)号：US20200018306A1

公开(公告)日：2020-01-16

申请号：US16506665

申请日：2019-07-09

Applicant: St. Jude Medical, Cardiology Division, Inc.

Inventor： Coleman Leach ,  Michael Kloosterboer ,  Brian Schmidt ,  Lawrence Swanson

IPC: F04B51/00 ,  G01K7/02 ,  G01K13/00 ,  G05D7/06 ,  G01F1/34 ,  F04B43/12 ,  F04B49/00 ,  A61M3/02

Abstract: A sensor used to control a peristaltic pump includes a housing, a tubing channel extending through the housing, a pressure sensor adjacent the tubing channel to measure an internal pressure of a tubing set inserted into the tubing channel, and a temperature sensor adjacent the tubing channel to measure a temperature of a wall of the tubing set. The sensor can also include a bubble sensor adjacent the tubing channel to detect bubbles within a fluid flowing through the tubing set. The sensor can be used to control a peristaltic pump. For instance, the peristaltic pump can include a microprocessor that can determine the internal pressure of the tubing set from an output of the pressure sensor and compute therefrom a pump factor required to maintain a given flow rate of the fluid flowing through the tubing set. It can then adjust a pump factor of the pump head to the computed pump factor.

公开(公告)号：US10472923B2

公开(公告)日：2019-11-12

申请号：US14533639

申请日：2014-11-05

Applicant: M-I L.L.C.

Inventor： Shiva Phani Kapavarapu ,  Christopher Nicholson ,  Charles Patrick

IPC: E21B34/02 ,  E21B44/06 ,  F04B49/00 ,  F17D3/00 ,  F16K47/00 ,  F16L58/04

Abstract: A fluid choke may include a housing and a shuttle configured to move within an interior chamber of the housing. The housing may have a fluid inlet channel and a fluid outlet channel. The shuttle may have a gate connected to an end of the shuttle and the gate may be configured to mate with a seat located in the housing at the fluid outlet channel. The shuttle may be moved within the interior chamber by a pressurized hydraulic fluid configured to apply a hydraulic pressure to a peripheral portion of the shuttle, an inner portion of the shuttle, and the gate.

公开(公告)号：US10421097B2

公开(公告)日：2019-09-24

申请号：US15911365

申请日：2018-03-05

Applicant: HENKEL IP & HOLDING GMBH ,  HENKEL AG & CO. KGAA

Inventor： David Duckworth ,  Sean Sklios ,  Jordan Yagoda ,  Jerone Chambers ,  John Rye

IPC: B05C11/10 ,  G05B13/02 ,  F04B5/02 ,  F04B9/00 ,  F04B13/00 ,  F04B15/02 ,  F04B23/02 ,  F04B49/00 ,  F04B49/06 ,  F04B51/00 ,  G05B15/02 ,  F04B19/22

Abstract: A remote adhesive monitoring system is used in connection with adhesive applied to workpieces moving along a production line. A reservoir, pump, and applicator apply the adhesive to the workpieces. A monitor control computer has an associated data processing program. A pump cycle sensor senses pump cycles. An applicator sensor senses when the adhesive is applied to the workpieces. A workpiece sensor senses the workpieces moving along the line. The monitor control uses input from the applicator sensing means and the workpiece sensor to determine an ON time per each workpiece at a predetermined speed. The monitor control uses input from the workpiece sensor and the pump cycle sensor to determine the number of workpieces per pump cycle. The monitor control calculates an ON time to TOTAL time ratio per each workpiece. The monitor control will then calculate an amount of adhesive used for the given ON time to TOTAL time ratio.

公开(公告)号：US10316867B2

公开(公告)日：2019-06-11

申请号：US15454224

申请日：2017-03-09

Applicant: Parker-Hannifin Corporation

Inventor： Blake Adam Carl ,  James William Howland

IPC: F15B15/12 ,  F16H39/04 ,  F16K31/04 ,  F16K11/16 ,  F15B9/09 ,  F15B9/12 ,  F15B9/14 ,  F15B15/20 ,  F04B17/05 ,  F04B49/00

Abstract: A rotary actuator includes a central housing; an output shaft that extends through the central housing; a vane that is mechanically coupled to the output shaft and divides the central housing into a first chamber and a second chamber; and a flow control mechanism that is moveable within the central housing and including a high pressure port and a low pressure port for communicating hydraulic fluid into and from the first and second chambers. The flow control mechanism is moveable to position the high pressure port and low pressure port relative to the first chamber and the second chamber for communication of the hydraulic fluid, thereby generating a pressure differential across the chambers. The vane rotates within the central housing in response to the pressure differential, and rotation of the vane drives the output shaft. A motor is configured to receive control signals to drive the movement of the flow control mechanism.

公开(公告)号：US10302344B2

公开(公告)日：2019-05-28

申请号：US15401490

申请日：2017-01-09

Applicant: Whirlpool S.A.

Inventor： Marcelo Zanelato ,  Cristiano Candido Valerio

IPC: F04B49/00 ,  F04B49/06 ,  F04C28/00 ,  F25B49/02 ,  H02M1/00

Abstract: A variable capacity compressor (100), a cooler (200) including same, and a method and system for controlling a variable capacity compressor are disclosed. An electronic control (50), a thermostat (30) and a power source (10) are disclosed, the power source including a neutral terminal and a phase terminal, the thermostat including a first terminal and a second terminal, and the electronic control including a phase feed input and a neutral feed input, the neutral terminal of the power source electrically connected to the neutral feed input of the electronic control and the phase terminal of the power source electrically connected to the first terminal of the thermostat, the second terminal of the thermostat connected electrically to the phase feed input of the electronic control, the thermostat configured to feed and un-feed selectively the electronic control, the electronic control activating and deactivating selectively the compressor and controlling its cooling capacity according to signals from an operation state sensor (40).

公开(公告)号：US10284131B2

公开(公告)日：2019-05-07

申请号：US15935188

申请日：2018-03-26

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Takashi Kawashima ,  Yoshiki Nagata ,  Satoshi Okada ,  Fumihiro Kagawa ,  Kazuki Najima ,  Hiroshi Fukasaku

IPC: F04B49/10 ,  H02P27/06 ,  F04D25/06 ,  F04D27/00 ,  B60H1/32 ,  H02M7/5387 ,  F04B49/06 ,  F04B49/02 ,  F04B49/00 ,  H02M7/00 ,  H02M1/32

Abstract: A motor-driven compressor for a vehicle includes a housing, a compression unit, a motor, and an inverter device. The inverter device includes an inverter circuit, a capacitor, a current sensor, a determination means configured to control switching elements in response to the current sensor not detecting a flow of current when the motor stops operating and configured to determine whether or not the current sensor detects a flow of current when controlling the switching elements, and a discharge starting means configured to start discharging the capacitor when the determination means determines that the flow of current has not been detected.