Patents Examined by Daniel S Collins
  • Patent number: 10935054
    Abstract: The subject matter of this specification can be embodied in, among other things, an articulated joint includes a first rotary actuator having a first housing defining a first arcuate chamber comprising a first cavity, and an arcuate-shaped first piston having a first radius of curvature and disposed in said first housing for reciprocal movement in the first arcuate chamber, a second rotary actuator having a second housing defining a second arcuate chamber comprising a second cavity, and an arcuate-shaped second piston having a second radius of curvature and disposed in said second housing for reciprocal movement in the second arcuate chamber, wherein a first radial side of the first piston relative to the first radius of curvature is in bearing contact with a first radial side of the second piston relative to the second radius of curvature at a contact point between the first axis and the second axis.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: March 2, 2021
    Assignee: Woodward, Inc.
    Inventors: Kamran Eftekhari Shahroudi, Barry T. Brinks, Brian Hoemke
  • Patent number: 10935052
    Abstract: Described herein is a safety valve for a hydraulic circuit comprising a pump designed to supply a hydraulic fluid at a first pressure value to a pressure line, comprising: a chamber, which can be fluidically connected to the pressure line and is filled with the hydraulic fluid at a pressure value and a temperature value; and a casing with an opening, which can be connected to a reservoir of the hydraulic circuit; a shutter, which delimits the first chamber and can be displaced between a first position, in which it occludes the first opening, and a second position, in which it leaves the opening at least in part free; the valve comprises a thermally expandable element, which can be displaced, as a result of the temperature of the hydraulic fluid, between a first configuration that it assumes when the temperature of the hydraulic fluid is below the threshold value and a second configuration that it assumes when the temperature of the hydraulic fluid is above the temperature threshold value and in which it holds
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: March 2, 2021
    Assignee: LEONARDO S.P.A.
    Inventors: Giacomo Bacchiega, Lucas Martin Piccinini, Roberto Bozzi
  • Patent number: 10920800
    Abstract: A method is disclosed wherein two sheets of a flexible, inelastic substance are sealed along a periphery thereof, creating an interior reservoir preferably containing two or more elongate chambers, organized normal to an axis of traction. The disclosed axis of traction is an axis along which the disclosed device reduces length as a medium is introduced into the reservoir. Further disclosed is a method by which one or more bladders of flexible, inelastic substance are woven through two or more preferably parallel strips or strings. The bladders are adapted to receive a preferably gaseous or liquid medium. As the medium is moved into the bladders, the flexible strips or stings are deformed to cause the strips or strings to have a reduced length along the axis of traction.
    Type: Grant
    Filed: February 3, 2018
    Date of Patent: February 16, 2021
    Inventor: Alexander Sergeev
  • Patent number: 10920802
    Abstract: A harvester head having at least one hydraulic actuator with a cylinder and a piston. The hydraulic actuator having at least a cylinder chamber and a piston rod chamber, both chambers being connected to a hydraulic circuit. The piston separating the cylinder chamber and the piston rod chamber, a cavity provided in the piston, hydraulically connecting the cylinder chamber with the piston rod chamber and a check valve in connection with the cavity that allows hydraulic medium flow in an opening direction of the check valve.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: February 16, 2021
    Assignee: DEERE & COMPANY
    Inventors: Arto Alfthan, Timo Neuvonen, Joni Turunen, Samuli Jormanainen, Esa Jääskeläinen
  • Patent number: 10920803
    Abstract: An air cylinder includes a tubular cylinder and a piston which is moved by pressure of a fluid supplied to a chamber provided inside the cylinder. A monitoring device includes a heat flux sensor and a detection part. The heat flux sensor is provided to the cylinder and detects heat flux that flows between inside and outside of the cylinder due to compression or expansion of the fluid in the chamber caused in accordance with the movement of the piston. The detection part detects the moving state of the piston based on the output signal of the heat flux sensor.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: February 16, 2021
    Assignee: DENSO CORPORATION
    Inventors: Toshikazu Harada, Atusi Sakaida, Toshihisa Taniguchi, Norio Gouko, Keiji Okamoto, Keita Saitou
  • Patent number: 10920801
    Abstract: An actuator assembly includes an actuation member, a release member, and a source of pressurized gas, wherein during a normal mode of operation, the actuation member and the release member are engaged to move in unison, and wherein during an emergency mode of operation, pressurized gas automatically decouples the actuation member from the release member to move separately. In accordance with yet other aspects of the present disclosure, an electro-mechanical actuator includes an electro-mechanical drive system and an integrated backup system operated by a gas generator, wherein when the backup system is activated, the electro-mechanical drive system is decoupled, and the actuator moves to a predetermined position and mechanically locks in place.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: February 16, 2021
    Assignee: AEROCONTROLEX GROUP INC.
    Inventors: Christopher L. Fenn, Patrick Cronin
  • Patent number: 10914010
    Abstract: A refrigerant compressor includes: an electric component; and a compression component driven by the electric component to compress a refrigerant. At least one sliding member constituting the compression component is made of a base material (185) that is an iron-based material. An abrasion resistance film (180) including a surface layer constituted by at least fine crystals is formed on a sliding surface of the sliding member. The surface layer (181) includes an A portion in which a component contained most is diiron trioxide (Fe2O3). The A portion exists within a range of at least 0.3 ?m or less from an outermost surface of the sliding surface. The abrasion resistance film (180) may include at least one intermediate layer (182 to 184) located between the surface layer (181) and the base material (185). With this, self-abrasion resistance of the sliding member can be improved, so that the refrigerant compressor having excellent reliability and efficiency can be obtained.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: February 9, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshinori Ishida, Shingo Oyagi
  • 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: 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: 10895271
    Abstract: There is disclosed a rotary actuator apparatus for hydraulically or pneumatically rotating a robotic joint. In an embodiment the apparatus comprises: a curved piston rotatably coupled to an axle shaft, and positioned within a curved piston chamber; resilient barrier modules are adapted to separate the curved piston within the curved piston chamber from first and second hydraulic or pneumatic chambers on either side of the curved piston chamber; whereby, in use, the curved piston is configured to rotate about the axle shaft upon hydraulic or pneumatic pressure being applied to at least one of the first and second hydraulic or pneumatic chambers.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: January 19, 2021
    Assignee: MIRSEE ROBOTICS INC.
    Inventor: Robert David Ings
  • 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: 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: 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: 10876551
    Abstract: A robotic joint that includes a hydraulic actuator. The hydraulic actuator includes a hollow tube that has a first opening at a first end of the hollow tube and that has a second opening at a second end of the hollow tube. The hollow tube contains hydraulic fluid. A moveable magnet moves within hollow tube as a result of a magnetic field within the hollow tube. A magnetic field source located outside the hollow tube creates the magnetic field within the hollow tube. When the moveable magnet moves to the first end of the hollow tube, a first piston pushes hydraulic fluid out of the first opening. When the moveable magnet moves to the second end of the hollow tube a second piston pushes hydraulic fluid out of the second opening.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: December 29, 2020
    Inventor: William Davis Simmons
  • 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: 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: 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: 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: 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