Patents Examined by Thomas E. Lazo
  • Patent number: 10900478
    Abstract: A pump diaphragm for a diaphragm pump for conveying a fluid includes a solid core with a connection device for a drive rod of the diaphragm pump, and a plate-shaped elastic diaphragm body made of rubber having a peripheral clamping edge. The solid core is embedded at least partially in the diaphragm body and the solid core is produced from a thermoplastic and forms covalent bonds with the elastic diaphragm body made of rubber without adhesive. For this purpose, the thermoplastic, for example polyamide 612 or polyphenylene ether, and the rubber, a periodically cross-linked rubber such as EPDM, are selected in such a way that they are covalently cross-linked with one another at the boundary layer. In this way, a bonding layer that is susceptible to weakening or destruction is not present between the core and the diaphragm body.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: January 26, 2021
    Assignee: DÄTWYLER SCHWEIZ AG
    Inventors: Maria Del Mar Diez Diaz, Rudolf Randler, Raphael Kälin, Norbert Haberland
  • Patent number: 10900825
    Abstract: Hydraulic valve circuitry adapted for automatic weight-responsive control of load-clamping members of a load-lifting system having a free lift mast. The load-lifting system generally includes one or more fluid power actuator for applying a gripping force to a load, at least one elongate, longitudinally-extensible fluid power lifting device having a free lift range of motion and at least one main lift range of motion, and manually operated load-clamping and load-lifting selector valves. The hydraulic valve circuitry provides, independently, weight-responsive control of the load-clamping members when lifting a load, full-time automatic weight-responsive force control of the load-clamping members without concurrent manual actuation of load-clamping or load-lifting selector valves, and equalization of sensed load weight so that the sensed load weight is substantially independent of the longitudinally-extensible position of the lifting device.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: January 26, 2021
    Assignee: Cascade Corporation
    Inventor: David W. Petronek
  • Patent number: 10895270
    Abstract: A hydraulic actuator (1) is disclosed comprising a cylinder housing (2), a piston (5) with a piston rod (6) being displaceably arranged inside the cylinder housing (2) and a pressure amplifier (10) comprising an inlet section (18) with a pressure inlet port (20), an active section (19) with a high pressure outlet port (22), a low pressure chamber (32) and a high pressure chamber (38a). It is an objective of the invention to provide a hydraulic actuator (1) with a modular pressure amplifier (10). To this end, the inlet section (18) is arranged inside the piston rod (6), and wherein the low pressure chamber (32) is stationarily arranged relative to the inlet section (18).
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: January 19, 2021
    Assignee: PISTONPOWER APS
    Inventors: Jørgen P. Todsen, Tom Tychsen, Peter Zavadinka, Lubos Vokel, Juraj Hanusovsky, Jørgen Mads Clausen
  • Patent number: 10895249
    Abstract: A hydraulic transaxle comprises an axial piston hydraulic pump having a variable displacement, and a transaxle casing incorporating the hydraulic pump. The hydraulic pump includes a movable swash plate and a pair of trunnion shafts. The transaxle casing includes a pair of side walls, and includes a pair of casing holes each of which penetrates each of the side walls between an inside and an outside of the transaxle casing. The pair of trunnion shafts are passed through the respective casing holes. The swash plate is formed with a pair of swash plate holes in the respective side portions facing the respective side walls in the inside of the transaxle casing. Proximal end portions of the respective trunnion shafts are inserted into the respective swash plate holes. A distal end portion of one of the trunnion shafts projects from the corresponding casing hole to the outside of the transaxle casing.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: January 19, 2021
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Daisuke Murashima, Koji Iwaki, Toshifumi Yasuda, Katsumoto Mizukawa
  • Patent number: 10890252
    Abstract: A control mechanism for a hydrostatic transmission includes a piston rod, a neutral biasing spring, a piston, a cylinder case provided with a first fluid chamber and a second fluid chamber, a solenoid valve capable of selectively supplying pressurized fluid to the first fluid chamber and the second fluid chamber, a pivot shaft configured to swingably support the cylinder case, and a first relief valve configured to flow the hydraulic fluid from the first fluid chamber to the second fluid chamber when a hydraulic pressure in the first fluid chamber exceeds a set pressure, and a second relief valve configured to flow the hydraulic fluid from the second fluid chamber to the first fluid chamber when a hydraulic pressure in the second fluid chamber exceeds a set pressure.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: January 12, 2021
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Jun Matsuura, Nobuhisa Kamikawa
  • Patent number: 10890197
    Abstract: Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: January 12, 2021
    Assignee: ClearMotion, Inc.
    Inventors: Joseph Thomas Belter, Graham A. Dowie, Marco Giovanardi, Brian Alexander Selden
  • Patent number: 10889963
    Abstract: A working machine includes a hydraulic pump, a first traveling device to be driven by a first traveling hydraulic actuator, a second traveling device to be driven by a second traveling hydraulic actuator, a first output tube to connect a first output port of the hydraulic pump to the first traveling hydraulic actuator, a second output tube to connect a second output port of the hydraulic pump to the second traveling hydraulic actuator, a first operation device to operate the first traveling device, a second operation device to operate the second traveling device and a correction mechanism to equalize a driving force of the first traveling hydraulic actuator and another driving force of the second traveling hydraulic actuator when the first operation device and the second operation device are operated each at same operation extents to perform a straight-traveling operation.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: January 12, 2021
    Assignee: KUBOTA CORPORATION
    Inventor: Hiroshi Horii
  • Patent number: 10883476
    Abstract: An air compression apparatus which can be used without requiring power supply equipment, including: a cylindrical body; an impeller which is provided inside the cylindrical body; a rotary shaft provided to be rotatable coaxially with the impeller; a cylindrical casing accommodating a part of the rotary shaft; a rotation transmission mechanism that transmits the rotation of the impeller to the rotary shaft while increasing the rotation speed of the rotary shaft; a piston connected via a crank unit to the rotary shaft housed in the casing; a cylinder provided on the outer peripheral wall of the casing; an introduction unit provided in a cylinder for introducing air into the cylinder; and a discharge pipe each connected to the cylinder for discharging a compressed air compressed by the piston inside the cylinder. Therefore, it is possible to provide an air compression apparatus which can be used without requiring power supply equipment.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: January 5, 2021
    Assignee: NGUYEN CHI CO., LTD.
    Inventor: Nguyen Thanh Le
  • Patent number: 10883599
    Abstract: A piston assembly for a transmission includes a piston and a washer connected to the piston. In one embodiment, the washer includes a circumferential ring that extends continuously about an inner diameter, wherein a cavity is defined between the piston and the washer. A bearing element is retained and centered on the washer by the circumferential ring.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: January 5, 2021
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Jordan Geiser, Brandon Heitger
  • Patent number: 10883253
    Abstract: The present disclosure relates to a method for controlling a swing motor in a hydraulic system and a hydraulic system. The method for controlling the swing motor in the hydraulic system and the hydraulic system according to the exemplary embodiment of the present disclosure may ensure the sufficient amount of hydraulic oil in a make-up line in a situation in which the hydraulic oil needs to be supplementarily supplied to the swing motor in the hydraulic system. Therefore, it is possible to prevent the occurrence of cavitation in the swing motor by stably supplying the amount of hydraulic oil at the point in time where the hydraulic oil needs to be supplementarily supplied to the swing motor. In addition, it is possible to prevent the occurrence of abnormal noise which is harsh to the ear when the cavitation occurs.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: January 5, 2021
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventor: Yong Lak Cho
  • Patent number: 10876522
    Abstract: A radial piston device includes a housing (102), a pintle (110) attached to the housing (102) and having a pintle shaft (112), a rotor (130) rotatably mounted on the pintle shaft (112) and having cylinders (132), pistons (150) displaceably received in the cylinders (132), and a drive shaft (190) coupled to the rotor (130) and rotatably supported within the housing (102). The rotor (130) is made with two parts, such as a rotor body (250) and a rotor insert (252) received into the rotor body (250).
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: December 29, 2020
    Assignee: Eaton Intelligent Power Limited
    Inventors: Sanjeev Dhuri, Dhawal Goyal
  • Patent number: 10876552
    Abstract: Hydraulic pressure compensator units and hydraulic systems incorporating hydraulic pressure compensator units. The pressure compensator units include a main valve body defining a central axis and a first central passage, a compensation valve member positioned in the first central passage and defining a second central passage, the first central passage being in selective fluid communication with a port of hydraulic actuator. A load sense check component is positioned within the second central passage and adapted to move in a first axial direction to selectively open a fluid communication between a pump output and a load sense line. A reverse flow check component is positioned within the second central passage and adapted to move in a second axial direction opposite the first axial direction to selectively open a fluid communication between the hydraulic actuator and a tank line.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: December 29, 2020
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventor: Manohar S. Kutre
  • Patent number: 10864897
    Abstract: A brake device for a hydraulic motor vehicle brake system without a vacuum booster, with a housing with at least one pressure chamber arranged therein, with a cylinder piston which can be axially moved in an actuation direction by an actuating rod unit coupled to the cylinder piston in order to generate brake pressure, wherein a rigid stop is provided for the cylinder piston which defines the non-actuated starting position of the cylinder piston. In order to provide an improved brake device of the above-mentioned type, which permits simple and reliable detection of the zero point and simultaneously has reduced noise emission on the return, a damping element is provided which permits a mechanical decoupling of the actuating rod unit from the cylinder piston in a release direction opposite the actuation direction by reversible deformation.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: December 15, 2020
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Andreas Bischoff, Jefferson Colasanta, Marc Ibanez, Manfred Rüffer, Thomas Sellinger
  • Patent number: 10865788
    Abstract: A fluid-driven actuator system includes a fluid-driven actuator and at least one proportional control valve and at least one pump connected to the fluid-driven actuator to provide fluid to operate the fluid-driven 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 fluid driven actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to adjust at least one of a flow in the fluid system to a flow set point and a pressure in the fluid system to pressure set point and a concurrently establishes an opening of the at least one proportional control valve to adjust at least one of the flow to the flow set point and the pressure to the pressure set point.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: December 15, 2020
    Assignee: Project Phoenix, LLC
    Inventor: Thomas Afshari
  • Patent number: 10865872
    Abstract: A hydraulic transaxle includes a transaxle casing including an upper transaxle housing and a lower casing, hydrostatic transmission (“HST”), and an axle. The HST has a hydraulic pump and a hydraulic motor that are fluidly connected to each other. The hydraulic motor has a motor shaft that is drivingly connected to the axle through a reduction gear train that is disposed between the hydraulic pump and the axle. Reduction gear train has a gear shaft supported by the upper transaxle housing via a ball bearing. At least a part of the upper transaxle housing is formed by a gear top cover made of metal and covering the reduction gear train. Ball bearing is supported by the upper transaxle housing and the gear top cover.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: December 15, 2020
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Hiroshi Sugimoto, Takehiro Ota, Toshifumi Yasuda
  • Patent number: 10858806
    Abstract: A control module for controlling an operation of a hydraulic actuator that is associated with an earthmoving machine includes a body. The body has a spool chamber and a load sensing passageway associated with the spool chamber. The body also has a spool positioned axially, and at least partially, within the spool chamber. The spool is spring-biased by an end cap located at a first end of the body. The body also has a pair of electrohydraulic spool actuators that are located at a second end of the body and operable to axially displace the spool within the spool chamber. The pair of spool actuators are positioned in parallel and disposed adjacent to one another. The body also has an inlet chamber disposed parallel to the spool chamber and in selective fluid communication with the spool chamber via a spool supply passageway.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 8, 2020
    Assignee: Caterpillar Inc.
    Inventors: John Ferraz, Jr., Michael Thomas Jackson, William Norbert O'Neill
  • Patent number: 10858805
    Abstract: A construction machine is provided which includes a hydraulic closed circuit in which a single rod hydraulic cylinder is driven directly by a bidirectionally tiltable variable displacement pump and can stably speed up the contraction action of the single rod hydraulic cylinder. In the case where a contraction action of a hydraulic cylinder 10 is instructed through an operation lever 30, when a differential pressure obtained by subtracting the pressure of a cap chamber 10a from the pressure of a rod chamber 10b is equal to or lower than a first threshold value a set to a level equal to or higher than a selection setting pressure of a flushing valve 14, a controller 20 closes a rod side selector valve 12b to disable rod assist action for supplying hydraulic fluid from a second hydraulic pump 8 to the rod chamber, and when the differential pressure is higher than the first threshold value, the controller 20 opens the rod side selector valve to enable the rod assist action.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: December 8, 2020
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiromasa Takahashi, Shohei Sugiki, Kenji Hiraku, Juri Shimizu, Teppei Saitoh
  • Patent number: 10859148
    Abstract: A modular porting manifold for a hydrostatic transmission that serves as an end cover for the hydraulic motor, and which may be modularly interfaced with multiple different pump configurations having the same or similar pump interface across the different pump configurations. A pump interfacing section of the porting manifold may have a mating surface that interfaces with a corresponding mating surface of an outwardly addressable manifold of the pump. The pump interfacing section of the porting manifold may have at least two ports for communication of hydraulic fluid with the pump, in which the at least two ports are laterally spaced apart in the same horizontal plane to align with at least two corresponding ports on the pump manifold that are also in the same horizontal plane, which may provide less complex and easier to manufacture flow passages for the porting manifold and/or pump end block.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: December 8, 2020
    Assignee: Parker-Hannifin Corporation
    Inventors: Jason Scot Richardson, Thomas Kevin Castle, David Mark Heathcoat, Jr.
  • Patent number: 10857626
    Abstract: A pump fluid end includes a body that defines a plunger bore and a working fluid bore that intersects the plunger bore to form a cross bore. A packing bore is defined in the plunger bore and includes a packing sleeve bore, a taper relief bore, and a transition bore. The packing sleeve bore transitions to the taper relief bore at a radial shoulder and the taper relief bore transitions to the plunger bore across the transition bore. The transition bore extends between an external corner contiguous with the plunger bore and an internal corner contiguous with the taper relief bore and at least one of the external and internal corners is rounded and exhibits a radius. The packing bore is treated with a surface pre-stressing treatment.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: December 8, 2020
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: David Mark Stribling, Benedict I Portillo, John Dexter Brunet
  • Patent number: 10859100
    Abstract: An autarkic hydraulic linear drive with a hydraulic arrangement and a method for operating the same. The hydraulic arrangement a pump unit, an equalizing reservoir, a load switching valve configured to switch between a fast extension and a load extension, and a hysteresis circuit. The hysteresis circuit is configured for triggering a first switching process of the load switching valve at a first control pressure and a second switching process of the load switching valve at a second control pressure that is different than the first control pressure.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: December 8, 2020
    Assignee: Voith Patent GmbH
    Inventors: Hubert Schaber, Magnus Junginger