Patents Examined by Matthew Wiblin
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Patent number: 11326693Abstract: A piston assembly for a piston pump includes an actuator rod, a piston coupled to the actuator rod and configured to contact a radially-inner wall of a cylinder, and a piston support structure coupled to the actuator rod and configured to contact the radially-inner wall of the cylinder. A fluid channel extends through the actuator rod and the piston support structure, and the fluid channel is configured to deliver a lubricating fluid to an annular space positioned between the piston and the piston support structure along an axial axis of the piston assembly.Type: GrantFiled: February 13, 2020Date of Patent: May 10, 2022Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Raymond Netecke, Ban Q. Tran
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Patent number: 11306750Abstract: This invention relates to a versatile rotary vane actuator module and a thermal actuation system with universal adaptable shafts/installation and differential rotary and turbocharger mechanisms to actuate 0-360 degree or more for complicated, precision, extreme rotary applications like robotic excavators, airplanes, heavy or weapon machinery, satellite receivers or wind turbine position controls, remote pipeline valves, HIPP or subsea valves and BOP controls, the thermal actuation system includes three thermal elements (1) pressure sources (2) volume vessel (3) heat sources, the vane actuator comes with redundant edge seals and corner seal rings to minimize or eliminate the inherent leakage and the differential rotation mechanism and the turbocharger with a dynamic porting system to expand the rotation 360 degree more efficiently, the actuator module includes a least one housing assembly, at least one driver assembly and at least one dynamic embedded porting system.Type: GrantFiled: June 17, 2019Date of Patent: April 19, 2022Inventor: Jianchao Shu
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Patent number: 11306746Abstract: A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.Type: GrantFiled: August 7, 2020Date of Patent: April 19, 2022Assignee: KUBOTA CORPORATIONInventors: Yuji Fukuda, Keigo Honda, Ryosuke Kinugawa, Ryuki Nishimoto, Yuji Yamashita, Daisuke Sakurai
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Patent number: 11286965Abstract: A fluid actuator arrangement comprises a piston rod member, at least two cylinders each said cylinder having a piston body, and a clamping mechanism associated to each cylinder. Each clamping mechanism is arranged to engage and disengage the piston body of the cylinder to the piston rod member. The fluid actuator arrangement comprises further a control element arranged to control a back and forward movement of the respective piston body so that forward movement is slower than the backward movement and to control the movement of the respective piston bodies in relation to each other such that at least one piston body is always moving forward and such that an overlap exists wherein at least two of the piston bodies are moving forward simultaneously during a cycle.Type: GrantFiled: May 19, 2016Date of Patent: March 29, 2022Assignee: SAAB ABInventors: Magnus Landberg, Martin Hochwallner
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Patent number: 11261862Abstract: 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 working chambers, a hydraulic circuit between working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure and high-pressure valves regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine being configured to actively control 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, wherein the apparatus further comprises a controller configured to calculate the demand signal in response to a measured property of the hydraulic circuit or actuators.Type: GrantFiled: September 9, 2019Date of Patent: March 1, 2022Assignee: ARTEMIS INTELLIGENT POWER LIMITEDInventors: Niall James Caldwell, Matthew Green, Jill MacPherson
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Patent number: 11261583Abstract: To provide a traveling control mechanism and a traveling control method capable of controlling a traveling mechanism taking into consideration operation contents of a remote control valve. The problem is solved by a traveling control mechanism comprising a remote control valve (21, 22, 23, 24), a pressure adjusting solenoid valve (61, 62), a setting mechanism (70), and a controller (60). The traveling mechanism (8) allows a traveling speed to be switched between a high speed and a low speed in accordance with an operation amount of the remote control valve (21, 22, 23, 24). An HST circuit (30) is provided with a pump (31, 32) and a traveling motor (33), the pump (31, 32) connects to a pilot line (41, 42, 43, 44) allowing a hydraulic oil supplied from the remote control valve (21, 22, 23, 24) to flow therethrough, a pressure sensor (45) is attached to the pilot line (41, 42, 43, 44), and a rotation sensor (65) is attached to the traveling motor (33).Type: GrantFiled: August 30, 2019Date of Patent: March 1, 2022Assignee: TAKEUCHI MFG. CO., LTD.Inventor: Tomonori Sato
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Patent number: 11247653Abstract: A hydraulic control system for control of a hydraulic motor. The hydraulic control system comprises a fluid distribution assembly having a tank, a pump to pump fluid from the tank and a directional valve for distributing pressurised fluid from the pump and to return fluid to the tank; a valve assembly fluidly connected to the directional valve, the valve assembly having a first overcenter valve and a pressure reducing valve wherein a first main line connects the directional valve to the first overcenter valve and wherein a shuttle line connects the pressure reducing valve to the first main line; a hydraulic motor fluidly connected to the valve assembly wherein the first main line connects the hydraulic motor to the first overcenter valve; and a brake assembly fluidly connected to the pressure reducing valve, wherein a drain line connects the pressure reducing valve to the hydraulic motor.Type: GrantFiled: February 18, 2019Date of Patent: February 15, 2022Assignee: Dana Motion Systems Italia S.R.L.Inventors: Fabio Natali, Giovanni Mariech
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Patent number: 11242846Abstract: A lubricating oil supply apparatus may include a rotational portion that rotates together with a rotational shaft and a fixed portion that maintains a fixed location thereof and supplies oil through a space that circles with respect to a rotational center of the rotational portion, thereby supplying oil regardless of a rotational direction of the rotational shaft.Type: GrantFiled: September 20, 2018Date of Patent: February 8, 2022Assignee: LG ELECTRONICS INC.Inventors: Young Hwan Kim, Wonseok Kang, Jinkook Kim
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Patent number: 11242851Abstract: A linear actuator system includes a linear actuator and at least one proportional control valve and at least one pump connected to the linear actuator to provide fluid to operate the linear actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the linear actuator system to an operational set point.Type: GrantFiled: November 27, 2019Date of Patent: February 8, 2022Assignee: PROJECT PHOENIX, LLCInventor: Thomas Afshari
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Patent number: 11236826Abstract: A pot-shaped, cold-formed steel brake piston as a pot which is open on one side includes a base and a wall including inner and outer walls, a radially inwardly configured groove is open in a radially outward direction and forms, radially at the inside, a groove bead projection. The open side of the pot ends as a bearing for a friction pad backplate. Interfaces integrated at the inside on the end side serve a) for the fixing between friction pad and steel brake piston and b) as support bearing for spring mounting the friction pad. An aspect is a further improved steel brake piston of the new generation. The minimum inner diameter dimin is axially set back in the direction of the base by a multiple of the length of a wall thickness s, and the minimum piston inner diameter dimin is formed by the groove bead projection.Type: GrantFiled: April 27, 2017Date of Patent: February 1, 2022Inventors: Tobias Schmidt, Matthias Würz, Norbert Leidecker, Martin Klacik, Matthias Müller, Uwe Zeibig, Ulrich Lorenz, Rico Bauersfield
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Patent number: 11214940Abstract: Even where the differential pressure across a directional control valve associated with each actuator is very small, flow dividing control of the plurality of directional control valves can be performed stable, and even where a demanded flow rate suddenly changes at the time of transition from composite action to single action or the like, a sudden change of the flow rate of hydraulic fluid to be supplied to each actuator is prevented to implement superior combined operability. Further, the meter-in loss of the directional control valves can be reduced to implement a high energy efficiency.Type: GrantFiled: March 28, 2018Date of Patent: January 4, 2022Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Kiwamu Takahashi, Taihei Maehara, Takeshi Ishii
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Patent number: 11213938Abstract: A pressing tool is described for plastically deforming a workpiece. The pressing tool comprises a piston pump driven by a motor that rotates in operating rotation direction RA and a pressure release valve and a coupling arrangement, which mechanically couples the motor to the pressure relief valve, so that the motor opens the pressure relief valve when operated in a loosening rotation direction RL opposite to the operating rotation direction RA. Also described is a corresponding method of operating a pressing tool.Type: GrantFiled: November 7, 2019Date of Patent: January 4, 2022Assignee: Von ARX AGInventors: Matthias Ruch, Rudolf Kreuzer
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Patent number: 11168715Abstract: In a hydrostatic pressure cylinder, a holding member which holds a magnet is mounted on a piston unit to rotate together with a cylinder tube. The cylinder tube is capable of rotating with respect to a rod cover and a head cover. It is thereby possible to change an attachment position of a magnetic sensor by rotating the cylinder tube.Type: GrantFiled: November 7, 2018Date of Patent: November 9, 2021Assignee: SMC CORPORATIONInventor: Yumiko Ichikawa
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Patent number: 11162239Abstract: A hydraulic drive system includes a hydraulic pump, a boom-dedicated control valve, a turning-dedicated control valve, a boom-dedicated operation unit, a turning-dedicated operation unit, and a driving control unit.Type: GrantFiled: November 20, 2018Date of Patent: November 2, 2021Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Akihiro Kondo, Hideyasu Muraoka, Jun Umekawa
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Patent number: 11162243Abstract: A remote controlled demolition robot (10) comprising a controller (17) and at least one actuator (12) controlled through a hydraulic system (400) comprising at least one valve (13a) and a hydraulic gas accumulator (440), wherein the controller (17) is configured to determine a fluid flow in the hydraulic system (400), determine if the determined fluid flow in the hydraulic system is above a first threshold, and if so discharge the accumulator (440) to provide power to the actuator (12); and determine if the determined fluid flow in the hydraulic system is below a second threshold, and if so charge the accumulator (440) for buffering power in the hydraulic system (400).Type: GrantFiled: October 19, 2016Date of Patent: November 2, 2021Assignee: HUSQVARNA ABInventor: Tommy Olsson
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Patent number: 11156237Abstract: A system and method configured to direct the braking energy from a high-pressure port at the motor side of a hydraulic circuit to emergency steering, braking, accumulator(s) charging, and/or various work functions. The system and method are also configured to return hydraulic fluid back to the same high-pressure port when the motor is running as a pump.Type: GrantFiled: November 8, 2018Date of Patent: October 26, 2021Assignee: APPLIED INDUSTRIAL TECHNOLOGIES, INC.Inventors: Wenling Babbitt, W. E. Hoffner, III
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Patent number: 11149762Abstract: A pistonless double-acting cylinder apparatus comprises a piston rod member, a first cylinder member disposed on the piston rod member, a second cylinder member disposed on an end surface of the first cylinder member, a tie rod which connects the first cylinder member and the second cylinder member, nuts provided on both ends of the tie rod, a first sealing ring located between the first cylinder member and the second cylinder member, a first cushion and a second cushion disposed on the piston rod member. The piston rod member comprises a piston rod left section, a first sealing gasket disposed on the piston rod left section, a piston rod middle section disposed on an end surface of the first sealing gasket, a second sealing gasket disposed on an end surface of the piston rod middle section, a piston rod right section disposed on the second sealing gasket.Type: GrantFiled: September 29, 2020Date of Patent: October 19, 2021Inventor: Chaoneng Huang
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Patent number: 11149755Abstract: A hydraulic system for powering a winch assembly of a work machine includes a hydraulic reservoir, a pump, a cooling system, a first path of travel, and a second path of travel. The first path of travel is disposed between the pump and the cooling system, and the winch assembly is powered by the hydraulic fluid moving along the first path of travel. The second path of travel is disposed between the pump and the cooling system. When the winch assembly is in an active condition, a first valve is in an open position such that the hydraulic fluid moves along the first path of travel and through the cooling system. When the winch assembly is in an idle condition, a second valve is in an open position such that the hydraulic fluid moves along the second path of travel and through the cooling system.Type: GrantFiled: October 16, 2019Date of Patent: October 19, 2021Assignee: Caterpillar Inc.Inventors: Timothy L. Hand, Christopher M. Gruel
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Patent number: 11143175Abstract: A pressure booster constituting a cylinder apparatus is provided with a first piston and a second piston that are coupled to each other by a rod. A connection member provided to the second piston is configured so as to be displaceable from a connection position to a blocking position as a result of the connection member making contact with a cylinder body when the second piston is displaced in a direction where a boosting chamber contracts, and so as to be displaceable from the blocking position to the connection position as a result of the connection member making contact with the cylinder body when the second piston is displaced in a direction where the boosting chamber expands.Type: GrantFiled: March 5, 2018Date of Patent: October 12, 2021Assignee: SMC CORPORATIONInventors: Hiroyuki Asahara, Kazutaka Someya
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Patent number: 11105346Abstract: A hydraulic pressure amplifier arrangement (1) is described comprising a supply port (A1), a pressure outlet (A2) connected to the supply port via check valve means (3), a tank port (B1), an intensifier section (5) having a high pressure piston (6) in a high pressure cylinder (7) which is connected to the pressure outlet (A2), a low pressure piston (8) in a low pressure cylinder (9) and connected to the high pressure piston (6), an intermediate space (11) between the high pressure piston (6) and the low pressure piston (8), a control valve (12) controlling a pressure in the low pressure cylinder (9), and a feeder arrangement of the intensifier section (5) including an input connection (19) connected to the supply port (A1) and a return connection (20) connected to the tank port (B1). Such a pressure amplifier arrangement should have a simple construction. To this end the feeder arrangement (19, 20) comprises throttling means (21).Type: GrantFiled: April 9, 2020Date of Patent: August 31, 2021Assignee: PistonPower ApSInventors: Peter Zavadinka, Juraj Hanusovsky, Lubos Vokel, Jorgen P. Todsen, Jorgen Mads Clausen