Patents Examined by Thomas E. Lazo
  • Patent number: 11028861
    Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic cylinder (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and a selection valve set (850). The selection valve set is adapted to self-configure to a first configuration and to a second configuration when a net load (90) is supported by a first chamber (116, 118) and a second chamber (118, 116) of the hydraulic cylinder, respectively. When the selection valve set is enabled in the first and second configurations, the second and first control valve may fluctuate hydraulic fluid flow to the second and first chamber, respectively, to produce a vibratory response (950) that counters environmental vibrations (960) of the boom. When the selection valve set is not enabled, the first and second counter-balance valves are adapted to provide the hydraulic cylinder with conventional counter-balance valve protection.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: June 8, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventor: Meng (Rachel) Wang
  • Patent number: 11028559
    Abstract: Provided is a slewing-type hydraulic work machine including a boom raising working pressure detection unit that detects boom raising working pressure, and a capacity control device that controls a slewing motor capacity during a slewing and boom-raising operation and performs detecting an actual slewing distribution factor correspondence value corresponding to a ratio of energy distributed to a slewing motor to energy of discharged hydraulic oil, setting a boundary value of the actual slewing distribution factor correspondence value to limit the ratio more with increase in boom raising working pressure, and a capacity operation of making the slewing motor capacity higher than a limit capacity within a slewing priority allowable period until the actual slewing distribution factor correspondence value reaches the boundary value during the slewing and boom-raising operation and limiting the slewing motor capacity to the limit capacity or less after the slewing priority allowable period.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: June 8, 2021
    Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Masatoshi Kozui
  • Patent number: 11028558
    Abstract: A controller determines a compensation factor from an operating amount of an accelerator operating member and a hydraulic pressure of at least one of a first circuit and a second circuit. The controller determines a target vehicle speed from the operating amount of the accelerator operating member. The controller determines at least one of a target displacement of a travel pump and a target displacement of a travel motor from the target vehicle speed and the compensation factor.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: June 8, 2021
    Assignee: KOMATSU LTD.
    Inventor: Takahisa Oasa
  • Patent number: 11022151
    Abstract: A hydraulic device is provided. Working fluid stored in a fluid storage portion is supplied by a fluid supply portion to a power output portion. The fluid supply portion is driven by a brushless motor. A bypass flow path portion can be switched between a first state of supplying the working fluid from the fluid supply portion to the fluid storage portion and a second state of blocking the fluid supply portion from the fluid storage portion. A control to switch the bypass flow path portion from the first state to the second state after the brushless motor is started and a control to switch the bypass flow path portion from the second state to the first state when the brushless motor is stopped is performed. Backflow of the working fluid from the power output portion to the bypass flow path portion is prevented by a backflow prevention valve.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: June 1, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Hitomi Iizumi, Kenichi Kanatani, Hiroyuki Nishida
  • Patent number: 11022215
    Abstract: A work vehicle such as a tractor including an engine, a battery, a hydraulic continuously variable transmission, and an electric cylinder, and a power transmission mechanism. The hydraulic continuously variable transmission changes an output of the engine, and changes an angle of a movable swash plate to change a gear ratio thereof. The electric cylinder is driven by electric power supplied from the battery at least while the engine is stopped. With the power generated in the electric cylinder and transmitted, the power transmission mechanism changes the angle of the movable swash plate of the hydraulic continuously variable transmission.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: June 1, 2021
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Taihei Daiyakuji, Hitoshi Nomura
  • Patent number: 11022157
    Abstract: A cooling prioritization valve (5) for a hydraulic system (4) of a motor vehicle transmission (3) includes a valve housing (6), a valve slide (7), an inlet (18), an outlet (15), and a further outlet (21). A secondary system pressure circuit (39) of the hydraulic system (4) can be connected to the inlet (18), a cooler (54) can be connected to the outlet (15) or to the further outlet (21), and a suction loading (44) can be connected to the outlet (15) or to the further outlet (21). In a starting position, the inlet (18) is not connected either to the outlet (15) or to the further outlet (21). In a first control position, the inlet (18) is connected to the outlet (15). In a second control position, the inlet (18) is connected to the outlet (15) and the further outlet (21).
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: June 1, 2021
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventors: Alexander Haberstock, Armin Haugg, Thilo Schmidt, Markus Herrmann
  • Patent number: 11015621
    Abstract: A proportional control fluid actuator that is used as a positioning device in applications such as a hydraulic directional control valve. The activating device has a cylinder body attachable to a valve body and has a bore carrying a piston that is coaxially secured to an end of a valve spool. The device is provided with spaced openings in the cylinder body that communicate with the bore therein to introduce fluid to act on opposite sides of the piston. Factory pre-compressed spring means are provided for normally urging the piston and spool to a center position. Since the areas of the fluid pressure applied on both sides of the piston are different (due to a spool on one side of the piston), two pre-compressed springs are used to compensate the area difference to achieve a proportional movement of the spool.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: May 25, 2021
    Assignee: Air Power Systems Co., LLC
    Inventors: Vinay Kumar Dandamudi, Kenneth E. Thompson, Ryan S. Tietz
  • Patent number: 11002136
    Abstract: A hydraulic system includes a piston, a swash plate opposed to the piston, and a swash plate supporting member supporting the swash plate so that a tilt of the swash plate is variable. An oil reservoir portion is provided between the swash plate and the swash plate supporting member, the oil reservoir portion communicating with a pressure oil introducing passage. An area of the oil reservoir portion between the swash plate and the swash plate supporting member varies with the tilt of the swash plate.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: May 11, 2021
    Assignee: NABTESCO CORPORATION
    Inventors: Toshiya Akami, Sho Yamaguchi
  • Patent number: 11002271
    Abstract: A wear sleeve is removably mounted on a piston rod. The piston rod includes a piston cap, a piston rod body, and a piston head, with at least one of the piston cap and the piston head being removable from the piston rod body. The wear sleeve is disposed over the piston rod body and prevents the piston rod from contacting dynamic seals disposed within a pump. The wear sleeve is mechanically secured in a cylindrical recess on the piston rod between a cap shoulder of the piston cap and a head shoulder of the piston head.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: May 11, 2021
    Assignee: Graco Minnesota Inc.
    Inventors: Jeromy D. Horning, Steve J. Wrobel
  • Patent number: 11001990
    Abstract: A working machine includes a branched tube connected to a branched portion branching from an operation fluid tube, a plurality of input tubes connected to the second actuator valves, a plurality of output tubes connected to a pressure receiver portion of the second hydraulic device, a main tube connected to the third actuator valve, and a relay device, and the relay device includes a plurality of input ports connected to the plurality of input tubes, a plurality of output ports connected to the plurality of output tubes, a plurality of first flow lines connecting between the plurality of input ports and the plurality of input ports, a main port connected to the main tube, a branched port connected to the branched tube, and a second flow line arranged between the plurality of first fluid lines to connect between the main port and the branched port.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: May 11, 2021
    Assignee: Kubota Corporation
    Inventors: Yuji Fukuda, Keigo Honda, Takahiro Usami
  • Patent number: 11001989
    Abstract: A hydraulic system controller is disclosed. The hydraulic system controller may determine a maximum active circuit pressure of a set of active hydraulic circuits of the hydraulic system, wherein the hydraulic system includes a hydraulic pump to cause fluid to flow throughout the set of active hydraulic circuits; determine a circuit pressure of a hydraulic circuit of the hydraulic system; determine, based on a hydraulic flow command for the hydraulic circuit and the circuit pressure, a desired circuit delta-pressure for the hydraulic circuit; determine, based on the desired circuit delta-pressure and a pressure difference between the maximum active circuit pressure and the circuit pressure, a circuit valve setting for a circuit valve of the hydraulic circuit; and cause a control device to set a position of the circuit valve according to the circuit valve setting.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Rustin Glenn Metzger, Corey Lee Gorman, Adam Martin Nackers
  • Patent number: 10995779
    Abstract: Hydraulically-amplified, self-healing, electrostatic actuators that harness electrostatic and hydraulic forces to achieve various actuation modes. Electrostatic forces between electrode pairs of the actuators generated upon application of a voltage to the electrode pairs draws the electrodes in each pair towards each other to displace a liquid dielectric contained within an enclosed internal cavity of the actuators to drive actuation in various manners. The electrodes and the liquid dielectric form a self-healing capacitor whereby the liquid dielectric automatically fills breaches in the liquid dielectric resulting from dielectric breakdown.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: May 4, 2021
    Assignee: The Regents of the University of Colorado
    Inventors: Christoph Matthias Keplinger, Eric Lucas Acome, Nicholas Alexander Kellaris, Shane Karl Mitchell
  • Patent number: 10995778
    Abstract: This hydraulic system is provided with: a hydraulic pump; a pilot-type control valve; an electromagnetic proportional valve; a controller; and a pilot pressure switching unit which is capable of switching the electromagnetic proportional valve supply pressure to a first pressure during a normal operation, or to a second pressure lower than the first pressure. The control valve is provided with a bleed-off passage, and is capable of controlling the operating oil pressure supplied to the actuator, according to the opening area thereof. During an emergency operation, the electromagnetic proportional valve supply pressure is switched from the first pressure to the second pressure, the electromagnetic proportional valve is brought into a fully opened state, and the operating oil discharge amount from the hydraulic pump increases and decreases, and the operating oil pressure increases and decreases, and thus the operating speed of the actuator is controlled.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: May 4, 2021
    Assignee: TADANO LTD.
    Inventors: Naoto Kawabuchi, Naofumi Yoshida, Naotaka Masuda, Yasuhiro Fukumori
  • Patent number: 10988125
    Abstract: A fluid container having at least one internal chamber for receiving a fluid, and having at least one connector for hydraulically connecting the internal chamber to a downstream hydraulic apparatus, wherein the connector at the end thereof toward the internal chamber has a mouth portion. In order to propose an improved fluid container by way of which high volumetric flows can also pass through the connector at high throughflow rates with low losses and reduced resistance, it is proposed that an escape value of the connector is provided so as to be larger than 0.82, and the mouth portion in relation to a container wall region that directly surrounds the mouth portion is at least in portions designed so as to be raised in the direction of the internal chamber.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: April 27, 2021
    Inventors: Swen Ottmann, Manfred Rüffer
  • Patent number: 10989052
    Abstract: A power system including a pump drive having a first side and a second side, a motor that is operationally connected to the first side of the pump drive, an engine that is operationally connected to the second side of the pump drive, and a pump that is operationally connected to the pump drive. The preferred power system is adapted to power the item of equipment with either the motor or the engine. A method for providing power to an item of equipment by engaging the pump drive with the engine and/or the motor.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: April 27, 2021
    Assignee: Kolberg-Pioneer, Inc.
    Inventors: Robert Herman Frohreich, Christopher Bradley Gukeisen, Stephen Alexander Whyte
  • Patent number: 10982692
    Abstract: Provided is a swing-back preventing apparatus capable of preventing a hydraulic actuator in a stop state from operating by undesired load. The swing-back preventing apparatus includes a housing, a piston, and a pair of biasing members. First and second spaces are formed between the piston and the housing, and the piston includes a pair of communication passages that are communicable with first and second spaces. When the piston is located at a first offset position, the first space is blocked from a first port. When the piston separates from the first offset position, the first space is connected to the first port. When the piston is located at a second offset position, the second space is blocked from a second port. When the piston separates from the second offset position, the second space is connected to the second port. When the piston is located at a position on the first offset position side of a neutral position, a first communication passage is connected to the first space.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: April 20, 2021
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Masahiro Matsuo, Hiroaki Fujiwara
  • Patent number: 10981549
    Abstract: A brake-actuating device for a vehicle brake system comprises a fluid reservoir and a master cylinder arrangement. The fluid reservoir has an outlet connection, and the master cylinder arrangement has an inlet connection. The outlet connection of the fluid reservoir and the inlet connection of the master cylinder arrangement, in the connected-together state, define at least one axially overlapping connection region through which a fluid channel for the feed of fluid from the fluid reservoir into the master cylinder arrangement extends. Furthermore, the brake-actuating device comprises a sealing element, which is arranged in the connection region and seals off the latter to the outside, and a filter element for filtering the fluid to be fed to the master cylinder arrangement. The sealing element holds the filter element in a predetermined position in the fluid channel.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: April 20, 2021
    Assignee: ZF Active Safety GmbH
    Inventors: Yvonne Wuest, Dennis Wagner, Klaus Lemke, Daniel Noll
  • Patent number: 10975905
    Abstract: Aspects of the present disclosure relate to packing nut locking apparatus and methods for fluid ends, and associated components thereof. In one implementation a fluid end apparatus includes a fluid end body having an outer surface, and one or more stay rods disposed at least partially externally to the outer surface of the fluid end body. The fluid end also includes one or more packing nuts, and a lock assembly. The lock assembly includes a first block in contact with the one or more stay rods, and a second block in contact with the one or more packing nuts.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: April 13, 2021
    Assignee: FORUM US, INC.
    Inventors: Wesley Freed, Ryan Payne
  • Patent number: 10968925
    Abstract: An air cylinder includes a cylinder, a piston rod, a piston, and a controller. The piston rod has one end disposed in the cylinder and the other end protruding from the cylinder. The piston is provided at the one end of the piston rod and moves the piston rod by moving in the cylinder. The controller supplies gas into one of a space, which is a space in the cylinder directed on the piston rod side with respect to the piston, and a space, which is a space in the cylinder opposite to the space with respect to the piston, and sucks gas from an interior of the other of the spaces.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: April 6, 2021
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Takehiro Ueda, Takeshi Akao
  • Patent number: 10961999
    Abstract: A method for operating a pressure control system having a multi-stage compressor includes providing a multiply compressed pressure medium by the multi-stage compressor for filling a pressure medium reservoir or pressure medium chambers of the pressure control system. Providing the multiply compressed pressure medium includes (i) providing, by a first compression stage, a pre-compressed pressure medium and additionally compressing, at least by a second compression stage, the pre-compressed pressure medium, and/or (ii) introducing an already-compressed charging pressure medium into an intermediate volume between the first compression stage and the second compression stage of the multi-stage compressor and further compressing the charging pressure medium at least by the second compression stage.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: March 30, 2021
    Assignee: WABCO GMBH
    Inventor: Uwe Stabenow