Patents Examined by Matthew Wiblin
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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: 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: 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: 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: 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: 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: 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
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Patent number: 11085464Abstract: 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: GrantFiled: December 12, 2019Date of Patent: August 10, 2021Assignee: MICROTECNICA S.R.L.Inventors: Giacomo Mezzino, Franco Maino, Dario Molinelli
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Patent number: 11085466Abstract: An electrohydraulic system for use under water includes an electrohydraulic actuator and a container having an internal space provided for forming a volume which is enclosed from the environment and which is provided for receiving a hydraulic pressurized fluid. A hydraulic cylinder is provided in the internal space of the container, the inside of which is divided into a first cylinder chamber and a second cylinder chamber by a piston to which a first piston rod and a second piston rod are connected. The two active surfaces of the piston are the same or approximately the same size.Type: GrantFiled: March 26, 2018Date of Patent: August 10, 2021Assignee: Robert Bosch GmbHInventors: Alexandre Orth, Gottfried Hendrix, Markus Junker
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Patent number: 11079013Abstract: A hydraulic apparatus for stretching conductors for power lines comprising: a variable displacement hydraulic pump (10) that supplies by means of a hydraulic fluid a hydraulic motor (11) with a closed circuit connection; a displacement regulation system (15) of said hydraulic pump (10); a regulation system (20) of said hydraulic apparatus; characterised in that said regulation system (20) comprises: an inlet (21) that receives said hydraulic fluid that supplies said hydraulic motor (11); a first outlet (22) that supplies said displacement regulation system (15); a second discharge outlet (23); a flow limiter (30) connected to said inlet (21); a regulatable valve (31) connected to said flow limiter (30); a tap (36) connected between the outlet of said regulatable valve (31) and said first outlet (22); a measurement instrument (33) connected to the outlet of said regulatable valve (31), to measure the regulation pressure of said regulation system (20); a safety valve (34) connected to the outlet of said regulatType: GrantFiled: September 20, 2018Date of Patent: August 3, 2021Assignee: TESMEC S.P.A.Inventors: Alberto Oscar, Roberto Pedrocchi
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Patent number: 11078932Abstract: A hydraulic machine is provided. A first flow control valve directs fluid from a first fluid supply to a first actuator when the first flow control valve is in a first position. A conflux control valve directs fluid from the first fluid supply to a second flow control valve when the conflux control valve is in a conflux position. The second flow control valve directs fluid from a second fluid supply and the first fluid supply to a second actuator when second flow control valve is in a second position. A bypass path allows the first fluid supply to communicate with the conflux control valve by passing around the first flow control valve.Type: GrantFiled: December 15, 2017Date of Patent: August 3, 2021Assignee: VOLVO CONSTRUCTION EQUIPMENT ABInventors: Youngjin Son, Seonggeun Yun, Manseuk Jeon
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Patent number: 11067100Abstract: The invention relates to a device for supplying ports to a machine section (26) of a hydraulic machine arrangement (40), the device (10) comprising a low-pressure inlet port (12), a leakage inlet (16), a low-pressure chamber (18) having a low-pressure opening (22) for establishing fluid communication with the machine section (26), a high-pressure outlet port (14), and a high-pressure chamber (20) that is in fluid communication with the high-pressure outlet port (14), the high-pressure chamber (20) having a high-pressure opening (24) for establishing fluid communication with the machine section (26), wherein the low-pressure inlet port (12) is in fluid communication with the low-pressure chamber (18), wherein a leakage path (36) extends from the high-pressure chamber (20) through the machine section (26) to the leakage inlet (16), characterized in that the device (10) further comprises a control valve member (28) connecting the leakage inlet (16) to the low-pressure chamber (18), wherein the control valve membType: GrantFiled: May 20, 2020Date of Patent: July 20, 2021Assignee: DANFOSS A/SInventors: Georg Enevoldsen, Poul Erik Hansen, Frank Holm Iversen
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Patent number: 11067067Abstract: A hydraulic device includes a shaft mounted in a housing rotatable about a first axis of rotation. The shaft has a flange extending perpendicularly to the first axis. A plurality of pistons is fixed to the flange. A plurality of cylindrical sleeves cooperates with the pistons to form respective compression chambers of variable volume. The cylindrical sleeves are rotatable about a second axis of rotation which intersects the first axis of rotation by an acute angle such that upon rotating the shaft the volumes of the compression chambers change. Each piston has a piston head including a circumferential wall of which the outer side is ball-shaped and the inner side surrounds a cavity. Each of the pistons is fixed to the flange by a piston pin having a piston pin head including a circumferential outer side facing the inner side of the circumferential wall of the piston head.Type: GrantFiled: May 17, 2017Date of Patent: July 20, 2021Assignee: INNAS BVInventor: Peter Augustinus Johannes Achten
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Patent number: 11060261Abstract: A slewing hydraulic work machine includes a slewing control device performing a slewing control in accordance with an applied slewing command operation, a boom control device performing a boom-raising control in accordance with an applied boom-raising command operation, a boom angle detector, and a capacity control section. The capacity control section calculates a command motor capacity based on a boom angle, generates a capacity command signal corresponding to the command motor capacity and inputs the signal to a slewing motor. During the performance of slewing and boom-raising operation, the capacity control section sets the command motor capacity to a value equal to or less than a base capacity when the boom angle is equal to or less than a slewing priority angle and sets the command motor capacity to a value greater than the base capacity when the boom angle is greater than the slewing priority angle.Type: GrantFiled: November 16, 2018Date of Patent: July 13, 2021Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.Inventor: Koji Ueda
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Patent number: 11047402Abstract: Electrically controllable hydraulic system for a vehicle transmission and method for controlling the same An electrically controllable hydraulic system (1) for a vehicle transmission comprises a pressure pump system (4a, 4b) and a subsystem (1A) comprising a transmission element (2) and an electrically controlled hydraulic pressure controlling module (1B) including a hydraulic valve element (15) for controlling a hydraulic pressure for actuating the transmission element (2) and an electromagnetically controllable operating element (21) for operating the hydraulic valve element (15). The subsystem (1A) and the pressure controlling module (1B) have a first and a second cut-off frequency (f1, f2) with f2>f1.Type: GrantFiled: August 17, 2018Date of Patent: June 29, 2021Assignee: Punch Powertrain N.V.Inventors: Rekha Kandiyil Raveendran, Timotheus Franciscus Adrianus Van Els
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Patent number: 11047110Abstract: A hydraulic sub-assembly of the present disclosure can be used with a power machine. The hydraulic sub-assembly can include a support panel and a plurality of components secured to the support panel, to be supported by the support panel relative to the power machine. The plurality of components can include a control valve configured to provide hydraulic control of the work functions and hydraulic. The support panel can be configured to be a structural portion of a cab of the power machine.Type: GrantFiled: February 24, 2020Date of Patent: June 29, 2021Assignee: CLARK EQUIPMENT COMPANYInventors: Mark Binstock, Scott LaCoe, Kjell Kroh, Kenneth L. Dieter
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Patent number: 11041512Abstract: An electro-hydraulic linear actuator module comprising a stator having a cylindrical bore therethrough, a linear electric machine translator movable axially within the stator bore, a positive displacement chamber adjacent each end of the translator for holding, in use, an incompressible fluid, first and second fluid pathways, one to each chamber, for the flow of an incompressible fluid, wherein movement of the translator along the stator bore alters the volumes of the chambers.Type: GrantFiled: April 12, 2017Date of Patent: June 22, 2021Assignee: Libertine FPE LimitedInventors: Samuel Edward Cockerill, Edward Haynes