Patents Examined by Abiy Teka
  • Patent number: 11002259
    Abstract: A variable wobbler for a hydraulic unit is disclosed, which includes body defining a central vertical axis, a horizontal longitudinal axis and a horizontal transverse axis, and including an exterior surface having a segmented outer peripheral edge and a circular inner peripheral edge extending around the central vertical axis, wherein a datum point is located on a first lateral segment of the outer peripheral edge of the exterior surface, and wherein a 45 degree relief angle is formed between the outer peripheral edge of the first lateral segment and a datum line that extends through the datum point in a direction that is perpendicular to the horizontal longitudinal axis.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: May 11, 2021
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Gregory Alan Rittmeyer
  • Patent number: 11002245
    Abstract: A hydraulic motor assembly includes a flow controller, a displacement controller and a hydraulic motor. The flow controller controls the flow of hydraulic fluid through the hydraulic motor and the displacement controller controls motor displacement. The hydraulic motor converts the pressure and flow into angular displacement of a drive shaft. An electrical generator is connected to the motor drive shaft and provides electrical power to accommodate a varying electrical load. As the electrical load varies, the flow controller and displacement controller vary the flow and displacement of the hydraulic motor to vary the torque applied to the generator by the drive shaft so that the drive shaft rotates at a desired speed.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 11, 2021
    Inventors: Eric R. Funk, Randall A. Maro, David J. Rylander
  • Patent number: 11002258
    Abstract: A port plate for use in an integrated drive generator has a body defining a semi-cylindrical charge port communicating with two circumferentially smaller charge port portions. A diametrically opposed working pressure port has three smaller working pressure ports. A center plane is defined extending through a center axis of a bore within the body and equidistance between circumferential ends of the charge port and the working fluid port. A first angle is defined between the plane and a circumferential end of the smaller charge port. The first angle is between 15 and 25 degrees. An integrated drive generator and a method are also disclosed.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: May 11, 2021
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Derek R. Hochstetler, Ted A. Martin, Duane C. Johnson, Glenn C. Lemmers, Jr.
  • Patent number: 10995476
    Abstract: A prime mover and a plurality of hydraulic actuators, a hydraulic machine having a rotatable shaft in driven engagement with the prime mover and comprising a plurality of working chambers, a hydraulic circuit extending between working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure valve which regulates the flow of hydraulic fluid between the working chamber and a low-pressure manifold and a high-pressure valve which regulates the flow of hydraulic fluid between the working chamber and a high-pressure manifold. The hydraulic machine being configured to actively control at least the low-pressure valves of the working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the working chambers, responsive to a demand signal.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: May 4, 2021
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventor: Niall James Caldwell
  • Patent number: 10995475
    Abstract: A hydraulic circuit (11) of a hydraulic excavator (1) is provided with a main hydraulic circuit (11A) including a boom cylinder (5D), a pilot hydraulic circuit (11B) for operating the boom cylinder (5D) and a recovery hydraulic circuit (11C) including an accumulator (29). In this case, the recovery hydraulic circuit (11C) is provided with a recovery control valve (31) that recovers pressurized oil discharged from the boom cylinder (5D) to the accumulator (29), a main supply control valve (34) for supplying pressurized oil accumulated in the accumulator (29) to the main hydraulic circuit (11A) and a pilot supply control valve (37) for supplying pressurized oil accumulated in the accumulator (29) to the pilot hydraulic circuit (11B).
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: May 4, 2021
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Seiji Hijikata, Yasutaka Tsuruga, Kouji Ishikawa, Kiwamu Takahashi, Masatoshi Hoshino
  • Patent number: 10989171
    Abstract: An apparatus for storing and releasing compressed air energy includes at least one hydraulic-to-compressed air converter and at least one hydraulic-to-electric converter, both connected with an accumulator, which has at least one compressed-air storage tank. When hydraulic pressure is passed to the hydraulic-to-compressed air converter, it is converted to high-pressure compressed air, stored in the accumulator and released to generate a hydraulic force to the hydraulic-to-electric converter or the hydraulic-to-compressed air converter to convert hydraulic energy to electric or compressed air energy, respectively. A method for storing and releasing compressed air energy includes receiving hydraulic energy from a wind turbine and converting it to compressed air energy, storing the compressed air energy within an accumulator that has at least one storage tank, and then releasing the compressed air energy to generate a hydraulic force and convert hydraulic energy to electric or compressed air energy.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: April 27, 2021
    Assignee: KiNRG, Inc.
    Inventor: Ronald W Pickett
  • Patent number: 10988908
    Abstract: An underground construction device includes a hydraulic assembly having an internal combustion engine and a hydraulic pump driven by the internal combustion engine, a work device connected with the hydraulic assembly in a hydraulic circuit for introducing material to be pile-driven into the ground, a clamping apparatus connected with the work device for holding a material to be pile-driven, in clamped manner, which device has a hydraulic clamping cylinder, as well as a controller for opening and closing the hydraulic clamping apparatus. A further hydraulic pump for building up the clamping pressure of the clamping cylinder of the clamping apparatus is provided, which pump is operated by an electric motor. A method operates such an underground construction device.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: April 27, 2021
    Assignee: ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH
    Inventors: Albrecht Kleibl, Christian Heichel
  • Patent number: 10982413
    Abstract: A hydraulic system includes a hydraulic pump, a first hydraulic actuator, a second hydraulic actuator, a first control valve to control the first hydraulic actuator, and a second control valve to control the second hydraulic actuator, the second control valve being arranged on a downstream side of the first control valve. The hydraulic system includes a discharge fluid tube in which the operation fluid flows. The discharge fluid tube is connected to the first control valve. The hydraulic system includes a first fluid tube in which a return fluid flows toward the second control valve. The first fluid tube couples the first control valve to the second control valve. The hydraulic system includes a second fluid tube in which the return fluid flows toward the discharge fluid tube, and a third fluid tube in which a supply fluid flows toward the first fluid tube.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: April 20, 2021
    Assignee: Kubota Corporation
    Inventors: Yuji Fukuda, Yoshimitsu Tanaka, Keigo Honda
  • Patent number: 10982762
    Abstract: A hydrostatic transmission implements a braking system, in which at least one adjustable traction motor acting as a pump is supported via a closed circuit on an adjustable axial piston machine acting as a motor, which in turn is supported on an internal combustion engine. Since the internal combustion engine should not be rotated at excessive revolution rates, a control unit adjusts the swivel angle of the axial piston machine during braking. The axial piston machine is load-sensitive, as a relationship between the control pressure and the revolution rate and the pivot angle of the machine consists of a pressure difference between the two working lines of the closed circuit. Using a pre-control, a swivel angle of the axial piston machine is set during braking, and the swivel angle is corrected by a revolution rate controller, such that a target revolution rate is obtained on the combustion engine.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: April 20, 2021
    Assignee: Robert Bosch GmbH
    Inventors: Bernhard Kuemmel, Martin Behm, Michael Mast
  • Patent number: 10982697
    Abstract: A hydraulic drive unit includes: a pump; a pair of supply-discharge lines; a valve block; a sealed tank; a suction line that leads hydraulic oil in the sealed tank to the pump; a connecting line that connects an air vent port of the pump to the suction line; and a gas-liquid separator that separates air and the hydraulic oil flowing through the connecting line from each other. The pump is disposed upward of the valve block and the sealed tank in a vertical direction.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: April 20, 2021
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Koki Mibu, Akihiro Kondo, Akihito Suzuki
  • Patent number: 10982412
    Abstract: A hydraulic system includes: a boom cylinder; a working tool cylinder; a boom control valve; a working tool control valve; first and second fluid tubes through which operation fluid is supplied to the boom cylinder; third and fourth fluid tubes through which operation fluid is supplied to the working tool cylinder; a first relief valve provided in a first bypass fluid tube and configured to allow the operation fluid to flow from the fourth fluid tube toward the first fluid tube and to block the operation fluid flowing from the first fluid tube toward the fourth fluid tube; and a second relief valve provided in a second bypass fluid tube and configured to allow the operation fluid to flow from the third fluid tube toward the second fluid tube and to block the operation fluid flowing from the second fluid tube toward the third fluid tube.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: April 20, 2021
    Assignee: KUBOTA CORPORATION
    Inventors: Robert Stewart Boyd, Kosuke Oyama
  • Patent number: 10975896
    Abstract: A pneumatic valve drive (1) for a valve (2), in particular for a vacuum valve, which has at least one pneumatic cylinder (3) with at least one piston (4) that is movably mounted in the pneumatic cylinder (3) and at least two cylinder cavities (5, 6) arranged on opposite sides of the piston (4). Each cylinder cavity (5, 6) is connected to at least one pressure source for applying pressure to each cylinder cavity (5, 6). One of the pressure sources is a constant pressure source (7) for applying a constant pressure to the cylinder cavity (5) arranged on one of the sides of the piston, and one of the other pressure sources is a regulated pressure source (8) for applying a variably regulatable pressure to the cylinder cavity (6) arranged on the opposite side of the piston (4).
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: April 13, 2021
    Assignee: VAT Holding AG
    Inventors: Christoph Böhm, Adrian Eschenmoser
  • Patent number: 10975897
    Abstract: Disclosed embodiments include power machines, and hydraulic systems for power machines, in which a machine controller is configured to detect high temperature conditions of the hydraulic oil and to responsively control or reduce the overall torque available from the engine to reduce heat generation in the hydraulic system.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: April 13, 2021
    Assignee: CLARK EQUIPMENT COMPANY
    Inventors: Charles Young, Brandon Kisse
  • Patent number: 10975893
    Abstract: A hydraulic system for a working machine includes a hydraulic pump to output an operation fluid, a hydraulic device to be operated by the operation fluid, an operation member to be operated, a first operation valve to regulate a pressure of the operation fluid in accordance with operation of the operation member, and a pressure supplying portion to supply a first counteracting pressure of the operation fluid against a first operation pressure, the first operation pressure being a pressure of the operation fluid regulated by the first operation valve.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: April 13, 2021
    Assignee: KUBOTA CORPORATION
    Inventors: Yuji Fukuda, Toshihiko Takemura
  • Patent number: 10967526
    Abstract: Certain exemplary embodiments can provide a system, machine, device, and/or manufacture configured for and/or resulting from, and/or a method for, activities that can comprise and/or relate to, an air beam configured to be dynamically moved, the air beam having an inflatable gas bladder, a first tube substantially surrounding the gas bladder, and one or more axial reinforcements.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: April 6, 2021
    Inventor: Ryan Gundling
  • Patent number: 10968603
    Abstract: A operator supporting electrohydraulic drive and control system based on, position sensors (8) (9), a electronic control unite ECU (2), a recovery, storing and re-use system for energy, and with actuator (3) (4) and the drive control valve (6) (7) bolted together in one (3+6) (4+7) unite and with the valve (6) (7) independently of the ECU (2) is controlling effective use of pump capacity and recovery of energy and with control of speed for low speeds, or prevented speed by valves (6) (7) or pump (10) (10a) (11) (11a) displacement and for higher speed with control of deplacement of pumps and motors and with valves (6) (7) at the same time controlled to be fully open.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: April 6, 2021
    Assignee: FLUTRON AB
    Inventor: Stig Stenlund
  • Patent number: 10969009
    Abstract: The present invention relates to an oil cooling apparatus for hydrostatic transmissions that includes a cooling main body coupled to a transmission case; an accommodating groove formed in the cooling main body to accommodate oil; a cover unit coupled to the cooling main body to cover the accommodating groove; a supply port configured to supply the oil to the accommodating groove; a discharge port configured to discharge the oil from the accommodating groove; a separating unit coupled to the cooling main body and configured to separate a flow path formed in the accommodating groove into a supply flow path connected to the supply port and a discharge flow path connected to the discharge port; and a hurdle unit coupled to each of an outer wall of the cooling main body and the separating unit, wherein the hurdle units may be formed to protrude from a bottom surface of the cooling main body so that an area of a flow region through which the oil passes is decreased.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: April 6, 2021
    Assignee: LS MTRON LTD.
    Inventors: Jai Yoon Shin, Jong Rak Choi
  • Patent number: 10962031
    Abstract: A control device for at least one hydraulic working section (A, B), which can be connected to a pressure supply source (P) and a return flow (T) via a hydraulic supply circuit and to a control valve (34) supplied with a pilot pressure. The device includes an emergency shutdown system (32) having a pilot solenoid valve (16) and an additional valve (14). Both the hydraulic energy flow from the pressure supply source (P) to at least one of the respective working sections (A, B) and the pilot pressure supply to the control valve (34) can be suppressed by the pilot solenoid valve (16) via the additional valve (14).
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: March 30, 2021
    Assignee: HYDAC SYSTEMS & SERVICES GMBH
    Inventors: Christoph Stoenner, Sascha Alexander Biwersi, Peter Jakobs
  • Patent number: 10961990
    Abstract: A hydraulic device (1) comprises a housing (27), a shaft (2) which is mounted in the housing (27) and rotatable about a first axis of rotation (4), wherein the shaft (2) has a flange (8) extending perpendicularly to the first axis (4), a plurality of pistons (9) which are fixed to the flange (8) at equiangular distance about the first axis of rotation (4), and a plurality of cylindrical sleeves (10) cooperating with the pistons (9) to form respective compression chambers (11) of variable volume. The sleeves (10) are rotatable about a second axis of rotation which intersects the first axis of rotation (4) by an acute angle such that upon rotating the shaft (2) the volumes of the compression chambers (11) change. Each piston (9) has a piston head (14) including a ball-shaped circumferential outer side.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: March 30, 2021
    Inventor: Peter Augustinus Johannes Achten
  • Patent number: 10954969
    Abstract: A servo actuator is provided which may comprise a controller configured to control a plurality of solenoid valves based upon an output signal. The plurality of solenoid valves may be used to control the position of the object. For example, a set of solenoid valves, of the plurality of solenoid valves, may be configured to conduct fluid from a tank into a first chamber of the cylinder, conduct fluid from the tank into a second chamber of the cylinder, conduct fluid from the second chamber of the cylinder into a first solenoid valve and/or conduct fluid from the first chamber of the cylinder into the first solenoid valve. The first solenoid valve, of the plurality of solenoid valves, may be configured to conduct fluid from the set of solenoid valves into a vent valve based upon a pulse width modulation (PWM) signal received from the controller.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: March 23, 2021
    Inventor: Shahin Fallahi