Patents Examined by Michael Leslie
  • Patent number: 11572900
    Abstract: A system and method is provided for monitoring a hydraulic power system having at least one light emitter and a button. The method includes powering on the hydraulic power system, receiving an actuation at the button and detecting a release of the button after a first time interval, and entering a diagnostic state. The method further includes retrieving a code and displaying the code by turning on the emitter in a first pattern. In some embodiments, a system and method is provided for regulating a temperature of a hydraulic power system. In some embodiments, a system and method is provided for controlling operation of a hydraulic torque wrench.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: February 7, 2023
    Assignee: Enerpac Tool Group Corp.
    Inventors: Nathan Adam Hughes, Curtis L. Van Weelden, Benjamin W. Keeton
  • Patent number: 11566640
    Abstract: To make it possible to control supply, discharge, and recycled flow rates independently of each other for the boom cylinder in a construction machine comprising first and second boom spool valves respectively connected to first and second hydraulic pumps. When the boom cylinder is contracted, the first boom spool valve is configured to control the recycled flow rate from head side oil chamber to rod side oil chamber, the second boom spool valve is configured to control the discharge flow rate from head side oil chamber to oil tank, and both first and second boom spool valves are configured not to supply pressure oil from first and second hydraulic pumps to the boom cylinder.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: January 31, 2023
    Assignee: Caterpillar SARL
    Inventors: Hideki Nakajima, Koichi Kiyasu
  • Patent number: 11566400
    Abstract: An electrically powered hydraulic system for a working machine includes: an electric motor to power a working hydraulic pump. A flow of hydraulic fluid generated by the hydraulic pump is controlled by the operation rotational speed of the electric motor. An electronic control unit is configured to: when an operator input device is in a first operating range, maintain the electric motor at a constant rotational speed, and control a variation in flow of hydraulic fluid to the hydraulic function with an electronically controlled control valve, and when the operator input device is in a second operating range, control a variation in flow of hydraulic fluid by varying the electric motor rotational speed and by controlling the control valve, according to displacement of the operator input device.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: January 31, 2023
    Assignee: Volvo Construction Equipment AB
    Inventor: Michael Schwall
  • Patent number: 11560946
    Abstract: A fluid system for a continuously variable transmission includes a first pump, a first actuation unit, a first line section, a second actuation unit, and a second line section. The first pump has a first sub-pump and a second sub-pump. The first actuation unit is assigned to a first disc set of the continuously variable transmission and the second actuation unit is assigned to a second disc set of the continuously variable transmission. The first line section fluidically connects the first pump to the first actuation unit and the second line section fluidically connects the first pump to the second actuation unit. The second sub-pump has a first connection that can be selectively fluidically connected to the first actuation unit via the first line section, or the second sub-pump has a second connection that can be selectively fluidically connected to the second actuation unit via the second line section.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: January 24, 2023
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Reinhard Stehr, Sebastian Köpfler, Markus Ciesek
  • Patent number: 11560906
    Abstract: A combined valve for insertion into an elongated bore of a power unit body of a hydraulic power unit may have an elongated carrier for receiving a relief and a check valve. The valve may also have a register arranged at a first axial position of a longitudinal axis of the carrier for calibration of the relief valve. The valve may also have a check valve coupled to the carrier at a second axial position along the longitudinal axis of the carrier. The valve may also have a relief valve coupled to the carrier at a third axial position along the longitudinal axis of the carrier. A minimal distance between the first and the second axial position may be less than a minimal distance between the first and the third axial position.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: January 24, 2023
    Assignee: Dana Motion Systems Italia S.R.L.
    Inventor: Piergiorgio Trinchieri
  • Patent number: 11560887
    Abstract: A fluid end for a fracturing pump includes a plurality of segments coupled together along a discharge axis, each segment of the plurality of segments having a plurality of suction bores. The fluid end also includes respective interfaces between segment pairs formed by adjacent segments of the plurality of segments, the interfaces coupling the segment pairs together. The fluid end further includes respective access areas proximate the respective interfaces, the respective access areas configured to provide access for mechanical couplings to join the segment pairs together.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: January 24, 2023
    Assignee: U.S. Well Services, LLC
    Inventors: Brandon Hinderliter, Lon Robinson, Jared Oehring
  • Patent number: 11555294
    Abstract: When a machine-control ON/OFF switch is switched to the ON position, a controller outputs either a first control signal generated by an operation lever or a second control signal that operates a boom cylinder in accordance with a predetermined condition; when the ON/OFF switch is switched to the OFF position, the controller outputs the first control signal; when a control signal has been switched from one of the first control signal and the second control signal to the other control signal by the operation of the ON/OFF switch, the controller applies a rate limit to the control signal, and controls the boom cylinder on the basis of the control signal obtained after the limitation.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: January 17, 2023
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Masafumi Hita, Yasuhiko Kanari
  • Patent number: 11555292
    Abstract: A boom system including a hoist boom pivoted to a machine base; a stick boom having a proximal end pivoted to the hoist boom and a distal end configured to carry a working tool; at least one hydraulic hoist cylinder mounted between the machine base and the hoist boom; a first stick cylinder mounted between the hoist boom and the stick boom; a second stick cylinder mounted similarly and mechanically linked with the first stick cylinder; and a hydraulic circuit for supplying hydraulic fluid to the hoist cylinder and stick cylinders, wherein the hydraulic circuit includes a hydraulic conduit line connecting a base end of the at least one hoist cylinder with a base end of the second stick cylinder to allow hydraulic fluid to shunt between the base ends of the hoist cylinder and the second stick cylinder.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: January 17, 2023
    Assignee: TIGERCAT INDUSTRIES INC.
    Inventor: Michael Wayne Carlyle
  • Patent number: 11555293
    Abstract: A prime mover and hydraulic actuators, a hydraulic machine having a rotatable shaft engaged with the prime mover and having a plurality of working chambers, a hydraulic circuit extending between a group of working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine having a low-pressure and a high-pressure valve regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine controlling the low-pressure valves of the group of 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 group of working chambers, responsive to a demand signal, the apparatus further having a controller calculating the demand signal responsive to a measured property of the hydraulic circuit or an actuator.
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: January 17, 2023
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, Jill Macpherson, Matthew Green
  • Patent number: 11542961
    Abstract: A hydraulic fluid pressure amplifier system includes a boost cylinder assembly, an energy storage device in fluid communication with the boost cylinder assembly, and a working cylinder assembly. The boost cylinder assembly includes a boost cylinder and a boost cylinder piston movable relative to the boost cylinder between a retracted position and an extended position, wherein movement of the boost cylinder piston from the retraced position to the extended position compresses a hydraulic fluid in a blind side volume of the boost cylinder from a nominal fluid pressure to an amplified high fluid pressure greater than the nominal fluid pressure. The energy storage device receives the hydraulic fluid compressed from the nominal fluid pressure to the amplified high fluid pressure. The working cylinder assembly is operatively connected with the boost cylinder assembly and is selectively operable for effecting the movement of the boost cylinder piston.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: January 3, 2023
    Assignee: Deere & Company
    Inventors: Michael J. Cliff, Steven R. Fliearman, Benjamin K. Dollins
  • Patent number: 11542684
    Abstract: A hydraulic machine is provided. A boom actuator includes a large chamber and a small chamber. A recovery unit receives fluid discharged from the large chamber and then recovers energy. A recovery line connects the large chamber and the recovery unit. An accumulator is connected to the recovery line. A jack-up assist line connects the accumulator and the small chamber. A jack-up assist valve is disposed on the jack-up assist line to block flow of fluid from the accumulator to the small chamber in a first position and allow the flow of fluid from the accumulator to the small chamber in a second position. A controller controls movement of the jack-up assist valve. The controller may determine whether or not the hydraulic machine is in a jack-up condition, and when the hydraulic machine is determined to be in the jack-up condition, moves the jack-up assist valve to the second position.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: January 3, 2023
    Assignee: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Hoenghwan Ahn, Taerang Jung, Sangkyu Joo, Seonggeun Yun, Seunghyun Lee, Byoungho Lee
  • Patent number: 11536298
    Abstract: A system for damping mass-induced vibrations in a machine having a long boom or elongate member, the movement of which causes mass-induced vibration in such boom or elongate member. The system comprises at least one motion sensor operable to measure movement of such boom or elongate member resulting from mass-induced vibration, and a processing unit operable to control a first control valve spool in a pressure control mode and a second control valve spool in a flow control mode in order to adjust the hydraulic fluid flow to the load holding chamber of an actuator attached to the boom or elongate member to dampen the mass-induced vibration. The system further comprises a control manifold fluidically interposed between the actuator and control valve spools that causes the first and second control valve spools to operate, respectively, in pressure and flow control modes.
    Type: Grant
    Filed: December 27, 2021
    Date of Patent: December 27, 2022
    Assignee: DANFOSS POWER SOLUTIONS II TECHNOLOGY A/S
    Inventor: QingHui Yuan
  • Patent number: 11536297
    Abstract: A hydrostatic actuator system includes an electric motor for delivering a hydraulic fluid via a piston unit. The actuator system is operating using a method in which a change in volume caused by a temperature change is sensed by a pressure measurement. The method reliably identifies a state of the transfer of the hydraulic fluid from a planetary roller transmission compartment into the master piston. The pressure measurement is continuously evaluated, and, in the event of a negative signal of the pressure measurement, suction of the hydraulic fluid by a planetary roller transmission lying in the hydraulic fluid between the electric motor and the piston unit into the piston unit is recognized and a fault signal is output.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: December 27, 2022
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Erhard Hodrus
  • Patent number: 11530524
    Abstract: A system for controlling hydraulic fluid flow within a work vehicle includes a load sense valve configured to adjust the pressure of a bleed flow within a load sense conduit. Moreover, the system includes a computing system configured to determine the pressure of the hydraulic fluid within the fluid supply conduit downstream of the flow control valve based on the data captured by a pressure sensor. Furthermore, the computing device is configured to control an operation of the load sense valve to selectively adjust the pressure of the bleed flow within the load sense conduit based on the determined pressure.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: December 20, 2022
    Assignee: CNH Industrial America LLC
    Inventors: Francesco Pintore, Stefano Fiorati, Jason David Fox, Andrea Vacca, Xin Tian
  • Patent number: 11530697
    Abstract: A pump rod has a head extending from a neck, and the head is received within a drive slot of a drive link. The head includes a projection, and has an area smaller than an area of the head. The projection contacts an inner surface of the drive slot. The drive link may include a projection aligned with a centerline of the drive link. The drive link projection contacts a head of the pump rod. The projections provide a reduced contact area between the pump rod and the drive link, thereby reducing any side-loading on the pump rod and increasing a lifespan of the wear parts.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: December 20, 2022
    Assignee: Graco Minnesota Inc.
    Inventors: David J. Thompson, Christopher A. Lins, Andrew J. Kopel, Glen W. Davidson, Chad R. Taszarek, Chris W. Sydow, William M. Blenkush, Steve J. Wrobel
  • Patent number: 11525242
    Abstract: In a control method for construction machinery, an operation performed by the construction machinery is divided into a plurality of subordinate works. A current subordinate work currently performed by the construction machinery is determined. A maximum absorbing torque of a hydraulic pump is adjusted according to the determined subordinate work. An engine speed change map is adjusted according to the determined subordinate work.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: December 13, 2022
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Wooyong Jung, Wonsun Sohn, Jaiseok Bang
  • Patent number: 11519431
    Abstract: A hydraulic actuator is disclosed that comprises a first, fixed portion and a second portion movable relative to the first portion. The second portion comprises a hydraulic actuating device for actuating a component, and the actuator further comprises an intermediate member configured to interconnect the first portion with the second portion and permit movement of the second portion relative to the first portion. The intermediate member is configured to convey hydraulic fluid to the hydraulic actuating device of the second portion through a body of the intermediate member.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: December 6, 2022
    Assignee: MICROTECNICA S.R.L.
    Inventors: Giacomo Mezzino, Franco Maino, Dario Molinelli
  • Patent number: 11519157
    Abstract: There is provided a work machine that can avoid an unintended movement of a blade. A crawler dozer includes a controller. The controller controls EPC valves. A left tilt cylinder and a right tilt cylinder are asymmetrically attached to a blade. The EPC valves control direction and flow rate of supply of hydraulic oil to the right tilt cylinder. The EPC valves control direction and flow rate of supply of the hydraulic oil to the left tilt cylinder. The controller controls the EPC valves and the EPC valves to extend or contract the left tilt cylinder and the right tilt cylinder at different rates.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: December 6, 2022
    Assignee: KOMATSU LTD.
    Inventors: Takuya Uemura, Yusuke Yamazaki
  • Patent number: 11512718
    Abstract: A hydraulic pressure amplifier arrangement (1) comprising a supply port (IN), a return port (R), a high pressure port (H1), and a pressure amplifier unit (2) having a low pressure inlet (3) connected to the supply port (IN) and a high pressure outlet (4) connected to the high pressure port (H1) is described, wherein the pressure amplifier unit (2) comprises an amplification factor. In such a hydraulic pressure amplifier arrangement it should be possible to allow simply releasing off pressure at the high pressure port while keeping small unnecessary energy consumption. To this end a control valve (8) is arranged in a connection between the high pressure port (H1) and the return port (R).
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: November 29, 2022
    Assignee: miniBOOSTER Hydraulics A/S
    Inventors: Christen Espersen, Peter Leonhard Wasmer, Thyge Bollmann, Peter J. Mads Clausen, Jan Petersen, Leif Hansen, Jimmy Thomsen, Andreas Wollesen
  • Patent number: 11511515
    Abstract: A piston for a heavy duty diesel engine including a composite layer forming at least a portion of a combustion surface is provided. The composite layer has a thickness greater than 500 microns and includes a mixture of components typically used to form brake pads, such as a thermoset resin, an insulating component, strengthening fibers, and an impact toughening additive. According to one example, the thermoset resin is a phenolic resin, the insulating component is a ceramic, the strengthening fibers are graphite, and the impact toughening additive is an aramid pulp of fibrillated chopped synthetic fibers. The composite layer also has a thermal conductivity of 0.8 to 5 W/m·K. The body portion of the piston can include an undercut scroll thread to improve mechanical locking of the composite layer. The piston can also include a ceramic insert between the body portion and the composite layer.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: November 29, 2022
    Assignee: Tenneco Inc.
    Inventors: Warran Boyd Lineton, Ross Allen Evers, Greg Salenbien