Patents Examined by Thomas E. Lazo
  • Patent number: 11408448
    Abstract: A pressure vessel includes: (a) a cylindrical sidewall having a wall thickness, an inside surface, an outside surface, and the cylindrical sidewall extending between a first end and a second end, wherein one of the first end or the second end includes a sidewall edge that forms part of an outwardly opening weld groove; (b) an end cap constructed to engage the cylindrical sidewall edge, the end cap comprising an end cap edge corresponding to the sidewall edge and that, when combined with the sidewall edge, forms the outwardly opening weld groove; (c) a cylindrically extending backer bar located in support of the outwardly opening weld groove formed by the sidewall edge and the end cap edge; and (d) a weld joint formed in the outwardly opening weld groove and holding the cylindrical sidewall to the end cap. A method for welding a pressure vessel sidewall and end cap together is provided.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: August 9, 2022
    Assignee: JARP Industries, Inc.
    Inventors: Joseph W. Jackan, Jeremy J. Gabor, Christopher J. Krzewina
  • Patent number: 11408452
    Abstract: An electro-hydraulic actuator includes a deformable shell defining an enclosed internal cavity and containing a liquid dielectric, first and second electrodes on first and second sides, respectively, of the enclosed internal cavity. An electrostatic force between the first and second electrodes upon application of a voltage to one of the electrodes draws the electrodes towards each other to displace the liquid dielectric within the enclosed internal cavity. The shell includes active and inactive areas such that the electrostatic forces between the first and second electrodes displaces the liquid dielectric within the enclosed internal cavity from the active area of the shell to the inactive area of the shell. The first and second electrodes, the deformable shell, and the liquid dielectric cooperate to form a self-healing capacitor, and the liquid dielectric is configured for automatically filling breaches in the liquid dielectric resulting from dielectric breakdown.
    Type: Grant
    Filed: March 11, 2021
    Date of Patent: August 9, 2022
    Assignee: The Regents of the University of Colorado
    Inventors: Christoph Matthias Keplinger, Eric Lucas Acome, Nicholas Alexander Kellaris, Shane Karl Mitchell
  • Patent number: 11408505
    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: May 3, 2021
    Date of Patent: August 9, 2022
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Taihei Daiyakuji, Hitoshi Nomura
  • Patent number: 11408449
    Abstract: A method and apparatus for dithering hydraulic valves to mitigate static friction (“stiction”) associated with the hydraulic valves. A first hydraulic valve and a second hydraulic valve are dithered to mitigate stiction associated with those valves. The dithering of the first and second hydraulic valves also cause dithering of a main hydraulic valve associated with the first and second hydraulic valves. Accordingly, stiction of three hydraulic valves of a hydraulic system is mitigated.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: August 9, 2022
    Assignee: Topcon Positioning Systems, Inc.
    Inventor: Vernon Joseph Brabec
  • Patent number: 11407396
    Abstract: An electric booster including an input member that is advanceably/retractably moved according to a brake pedal operation. An electric motor of an electric actuator advanceably/retractably moves a power piston. A master pressure control unit sets a target movement amount of the power piston according to an amount of a movement of the input member that is caused by the brake pedal, and controls the electric motor to move the power piston so as to achieve the target movement amount, thereby causing a brake hydraulic pressure to be generated in a master cylinder. The master pressure control unit includes a reaction force generation portion, which changes a characteristic of a hydraulic reaction force applied to the brake pedal. The reaction force generation portion corrects the target movement amount of the power piston according to a temporal change in the movement amount of the input member.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: August 9, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Naoki Takahashi, Daisuke Goto, Takaya Tsukagoshi, Norikazu Matsuzaki, Hiroaki Sato
  • Patent number: 11399464
    Abstract: An agricultural machine includes a float cylinder interconnecting a header linkage system and a frame. A rod side accumulator is in fluid communication with a rod side fluid port of the float cylinder. A float control valve is selectively controllable between an open position allowing fluid communication between a pressure source and the rod side accumulator, and a closed position blocking fluid communication between the pressure source and the rod side accumulator. A downforce accumulator is in fluid communication with a piston side fluid port of the float cylinder. A downforce control valve is selectively controllable between an open position allowing fluid communication between the pressure source and the downforce accumulator, and a closed position blocking fluid communication between the pressure source and the downforce accumulator.
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: August 2, 2022
    Assignee: DEERE & COMPANY
    Inventors: Timothy J. Kraus, Austin J. Karst
  • Patent number: 11401954
    Abstract: A hydraulic boosting and regulating system includes an intensifier circuit and a regulator and employs low leak, low crossover valves.
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: August 2, 2022
    Assignee: The Oilgear Company
    Inventors: Mitch Terhune, Jared Schlueter, Joshua B. Groves
  • Patent number: 11391306
    Abstract: In a linear actuator, a slide table is attached to a cylinder body via a guide mechanism so as to be movable along the longitudinal direction of the cylinder body. The slide table includes a table body arranged above the cylinder body and extending in the longitudinal direction, and an end plate joined to an end of the table body in the longitudinal direction so as to be substantially orthogonal to the table body. The end plate includes a storage chamber provided on one surface thereof in the longitudinal direction facing a guide mechanism and depressed from the one surface in a direction away from the guide mechanism. For example, when the linear actuator is used in an environment where powder dust and the like is scattered, the storage chamber stores therein a solidified matter made up of the powder dust and the like.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: July 19, 2022
    Assignee: SMC CORPORATION
    Inventors: Yoshihiro Toshimori, Toshio Sato, Atsumi Tsukada
  • Patent number: 11391017
    Abstract: A wheel loader is provided that can suppress abrupt change in vehicle speed accompanied by erroneous determination on a lift arm lifting operation. A wheel loader includes: an engine; an HST pump; an HST motor; a forward and reverse switch; a stepping amount sensor; an operation amount sensor; and a controller. The controller determines whether a specific condition for specifying an operation of the lift arm in an upper direction during forward travel of the vehicle body, on the basis of a forward and reverse switching signal, the stepping amount, and a pilot pressure pertaining to the lifting operation for the lift arm. In a case of the specific condition being satisfied, the vehicle speed is limited by controlling the displacement volume of the HST motor in conformity with increase in the pilot pressure.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: July 19, 2022
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koji Hyodo, Isamu Aoki, Tetsuji Tanaka, Masaki Nukii
  • Patent number: 11384511
    Abstract: A wheeled work vehicle includes: a transmission transmitting the rotational power of a traveling hydraulic motor to wheels; a traveling control valve having an interruption position that interrupts supply of hydraulic fluid from a hydraulic pump to the traveling hydraulic motor; a shift changeover valve that shifts the speed stage of the transmission by the position of the shift changeover valve being selectively switched; and a controller that controls the traveling control valve and the shift changeover valve. The controller switches the traveling control valve to the interruption position, then switches the position of the shift changeover valve such that the speed stage of the transmission is shifted to the low speed stage, and switches the traveling control valve from the interruption position to an original position side before the switching in a case where the controller shifts the transmission from the high speed stage to the low speed stage.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: July 12, 2022
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Kazuhiro Oouchi
  • Patent number: 11384836
    Abstract: A piston for a compressor includes a bearing portion having a cylindrical shape to define a suction space into which refrigerant is accommodated therein, the bearing portion being provided with a bearing surface facing an inner circumferential surface of the cylinder, a head portion coupled to a front opening of the bearing portion and provided with a plurality of suction ports which communicate with the suction space, the head portion having a compression surface configured to face a compression space to compress the refrigerant in the compression space, and a flange portion coupled to a rear opening of the bearing portion and provided with a through-passage through which the refrigerant is introduced from a muffler unit to the suction space, the flange portion being coupled to a driving portion to transmit driving force to the piston. The bearing surface is subjected to a surface treatment to improve abrasion resistance.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: July 12, 2022
    Assignee: LG Electronics Inc.
    Inventors: Youngkyun Lim, Jeongwoo Kim, Donghan Kim
  • Patent number: 11384777
    Abstract: An actuator operable to move a valve stem between an opened position and a closed position includes a cylinder including an open side and a close side, the cylinder coupled to the valve stem, a first pump connected to the cylinder and operable to deliver a first high-pressure fluid to the open side of the cylinder to move the valve stem toward the opened position, and a second pump separate from the first pump, the second pump connected to the cylinder and operable to deliver a second high-pressure fluid to the close side of the cylinder to move the valve stem toward the closed position.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: July 12, 2022
    Assignee: Siemens Energy, Inc.
    Inventor: John Casey
  • Patent number: 11384850
    Abstract: A hydraulic control valve includes a sleeve with actuator and biasing member ends and a spool with first and second lands. The sleeve defines a bore extending along a spool movement axis, a source port proximate the stow solenoid end and in communication with the bore, and a supply port between the source port and the biasing end. The spool is slidably disposed within the bore, is movable along the spool movement axis between first and second positions, fluidly separates the source port from the supply port in the first position, and allows the bore to fluidly couple the source port with the supply port in the second position. The first land extends circumferentially about the spool and has a first land length, the second land extending circumferentially about the spool and has a second land length, and the first land length is larger than the second land length.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: July 12, 2022
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Stuart T. Gerger, Stephen Michael Bortoli, Timothy Scott Konicek
  • Patent number: 11378599
    Abstract: A system (1) for spiking, i.e. exploring voltage, in electric cables (5) comprises a first clamping jaw (3) and a second clamping jaw (4) to lock a portion of an electric cable (5) in a clamping position (7), an elongated metal blade (8) which can be displaced between a retracted position and an extended position in the clamping position (7), a hydraulic actuator (9) to displace the blade (8), with respect to the first and second clamping jaws (3, 4), from the retracted position into the extended position, a pump (10) adapted to increase the pressure of a hydraulic liquid acting on the hydraulic actuator (9), a hand-held remote control (12) for remotely actuating and controlling the pump (10), wireless actuation communication means (13) adapted to provide pump actuation signals from the remote control (12) to the pump (10).
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: July 5, 2022
    Assignee: Cembre S.p.A.
    Inventors: Gualtiero Barezzani, Leonardo Livi
  • Patent number: 11377814
    Abstract: An energy recuperation system for construction equipment includes an actuator driving upward and downward operations of a work unit; an accumulator connected to the actuator; and a controller determining a predicted downward mode associated with the downward operation of the work unit, regulating a dischargeable lowest limit pressure of the accumulator to a target pressure corresponding to the predicted downward mode, and charging the accumulator having the dischargeable lowest limit pressure regulated to the target pressure with pressurized oil discharged from the actuator during the downward operation of the work unit to recuperate energy, and an energy recuperation method.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: July 5, 2022
    Assignee: Volvo Construction Equipment AB
    Inventor: Dongsoo Kim
  • Patent number: 11378109
    Abstract: A method of controlling an electro-hydraulic actuator (101). An electric voltage applied to the actuator (101) is established by superimposing a control variable with an oscillatory signal. A hydraulic pressure, influenced by the actuator (101), is measured. The oscillatory signal is adapted as a function of the measured hydraulic pressure.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: July 5, 2022
    Assignee: ZF Friedrichshafen AG
    Inventor: Sebastian Steidle
  • Patent number: 11377813
    Abstract: In a work machine including a controller (500) configured to calculate respective target velocities of a hydraulic cylinder (5) for moving a plurality of work point candidates (8a and 8b) set to a work device along an optionally set target surface (60) on the basis of positional data of the target surface, posture data of the work device (15), and operation data of an operation lever (1), and control the velocity of the hydraulic cylinder (5) according to one of a plurality of the calculated target velocities, the controller calculates a candidate point velocity (VTab or VTba) occurring in a case where each of the plurality of work point candidates is moved at the corresponding target velocity (VTa or VTb) and occurring at a remaining work point candidate, selects a velocity at which an entry into the target surface is least likely from among the plurality of candidate point velocities, and controls the hydraulic cylinder according to the target velocity of the work point candidate associated with the selecte
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: July 5, 2022
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hisami Nakano, Hiroaki Tanaka, Yusuke Suzuki
  • Patent number: 11371535
    Abstract: A fluid pressure circuit includes a directional switching valve arranged between a fixed displacement pump and a fluid pressure actuator and configured to switch a flow passage for a pressurized fluid, an accumulator arranged in a branch flow passage branched from a connection flow passage that connects the fluid pressure actuator and the directional switching valve, an accumulator flow control valve arranged between the connection flow passage and the accumulator, and a pump flow control valve arranged between the fluid pressure actuator and the fixed displacement pump and configured to variably divert a flow rate of the pressurized fluid discharged from the fixed displacement pump into a first system including the tank and a second system including the fluid pressure actuator.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: June 28, 2022
    Inventor: Yoshiyuki Shimada
  • Patent number: 11364615
    Abstract: The invention relates to a system for hydraulic actuation of multiple consumer units comprising a hydraulic circuit (130) operated by means of a hydraulic motor (122) which actuates a consumer unit (111) wherein, downstream of the first consumer unit (111), the hydraulic circuit (130) has at least one secondary circuit (140, 150) having at least a second consumer unit (114, 118) and arranged before the second consumer unit (114) and a pump (113, 117) directly or indirectly actuated by the first consumer unit (111).
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: June 21, 2022
    Assignee: SEPPI M. SPA
    Inventor: Seppi Lorenz
  • Patent number: 11352761
    Abstract: A work machine includes a controller (20) that performs an area restriction control for controlling at least one hydraulic cylinder (32a) of a plurality of hydraulic cylinders (32) in such a manner that a work device (400) is located on or on an upper side of an optionally set target surface (60) during operation of an operation lever (26). In the work machine, if a jack-up angle (?) as an inclination angle of a machine body (1A) relative to a ground is larger than a preset target value (?t), the controller, in performing the area restriction control, corrects the control of the at least one hydraulic cylinder (32a) in such a manner that the jack-up angle approaches the target value. The target value is set such as to vary according to posture of an arm (406).
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: June 7, 2022
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Yusuke Suzuki, Hiroaki Tanaka, Hisami Nakano