Patents Examined by Theresa Trieu
  • Patent number: 11976659
    Abstract: A rotary, self-priming, positive displacement pump is described. The pump may include a pump housing including an inlet and an outlet, a pump chamber including an upper wall, a lateral wall, and a floor, first and second rotary impellers in the pump chamber, and a pair of gears each secured to the first and second rotary impellers, and a pressure relief feature operable to relieve pressure developing in a relatively high pressure zone of the pump chamber. The gears mesh with each other to ensure that the vanes do not contact one another during rotation. The pressure relief feature may comprise one or more channels formed in the pump housing and/or the first and second rotary impellers. The channels connect the high pressure zone with another zone to redistribute pressure. The channels may include one continuous channel or alternatively, a plurality of unconnected channels.
    Type: Grant
    Filed: October 26, 2022
    Date of Patent: May 7, 2024
    Inventor: Joe Dick Rector
  • Patent number: 11976657
    Abstract: A compressor includes a motor, a compression mechanism portion driven by the motor, and a rotation shaft connecting the motor and the compression mechanism portion. At least a part of the rotation shaft is composed of a material having a higher Young's modulus than that of cast iron, and having a higher thermal conductivity than that of cast iron.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: May 7, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhiko Baba
  • Patent number: 11959478
    Abstract: A dry rotary pump for recirculating an at least partially gaseous composition containing hydrogen. The dry rotary pump comprising a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are driven in rotation by a drive system in a gear chamber. The dry rotary pump comprises a first pair of seals and a second pair of seals, each comprising a first shaft seal and a second shaft seal. The dry rotary pump comprises a pressure equalization chamber in fluid connection with a gap between the first shaft seal and the second shaft seal to regulate pressure in the gap. The gear chamber is in fluid connection with the gap, and the pumping chamber is in fluid connection with the first shaft seal and the first shaft seal by a pulsation attenuation chamber.
    Type: Grant
    Filed: February 17, 2020
    Date of Patent: April 16, 2024
    Assignee: BUSCH PRODUKTIONS GMBH
    Inventors: Théo Bilger, Boris Kossek, Matthias Benz, Yohann Perrot
  • Patent number: 11952899
    Abstract: A hydraulic machine comprising a rotary toroidal piston chamber with two or more stationary pistons, which are provided to operate in such chamber, and having input and output ports for each piston provides a bidirectional motor or pump operable with high constant torque and high efficiency. Radially movable gates provide closed sections of the piston chamber and open to allow continuous rotation in one direction without reciprocating pistons or cranking mechanism. Rotation of the chamber is achieved by reaction to the force of hydraulic pressure on the pistons. A rotary piston chamber with four stationary pistons, operating as a four piston hydraulic motor simultaneously driving itself as a two piston pump functions as a pressure multiplier providing output pressure higher than the input pressure. Uses include sump pump, pumped energy storage and hydroelectric power generation.
    Type: Grant
    Filed: December 5, 2022
    Date of Patent: April 9, 2024
    Inventor: Herbert Dym
  • Patent number: 11933306
    Abstract: A scroll compressor includes an orbiting bedplate which has an oil passage through which oil flows outward in a radial direction of the orbiting bedplate, a lap-side oil supply hole that causes the oil passage to communicate with a lap-formation surface of the orbiting lap, and a thrust-surface-side oil supply hole that causes the oil passage to communicate with a thrust surface of the orbiting bedplate that is opposite to the lap-formation surface of the orbiting bedplate. An opening and closing mechanism provided in the oil passage closes the thrust-surface-side oil supply hole when the pressure of oil that is drawn from an oil sump by an oil pump and supplied into the oil passage is low, and opens the thrust-surface-side oil supply hole when the pressure of the oil is high.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 19, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuro Hirami, Tomokazu Matsui, Yuji Takamura
  • Patent number: 11913453
    Abstract: The present application provides a slide valve, wherein the slide valve is configured to regulate a load of a twin-screw compressor. The slide valve comprises a slide valve body, wherein the slide valve body has a connecting end and a free end, the connecting end is configured to connect to a slide valve connecting rod of the twin-screw compressor, and the slide valve is driven to slide by the slide valve connecting rod. A cavity is formed in the free end of the slide valve body, and the slide valve has a passage configured to fluidly couple the cavity with an external fluid to reduce air flow pulsations on a suction side of the twin-screw compressor and thereby reduce overall air flow pulsations in the twin-screw compressor.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: February 27, 2024
    Assignees: Johnson Controls Tyco IP Holdings LLP, Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd.
    Inventors: Shengmei Yang, Shahebaz Malik
  • Patent number: 11905950
    Abstract: An improved screw pump such as, for example, a twin screw pump, includes a casing including an internal chamber, and first and second rotors rotatably positioned within the chamber of the casing. The first and second rotors have an intermeshing threaded-shape profiling. A plurality of bearing seal assemblies are provided at each end of the first and second rotors. Each bearing seal assembly includes a bearing positioned about an end portion of a rotor to facilitate rotation of the rotor, and a seal positioned about an end portion of a rotor to seal passage of the rotor through the casing. The bearing is coupled to the seal so that the seal may be secured to the casing via the coupling of the bearing to the casing.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: February 20, 2024
    Assignee: CIRCOR PUMPS NORTH AMERICA, LLC.
    Inventors: Victor Hall, Dennis Fowler, Vasanth Krishnasamy, Simon Bradshaw, Axel Jaeschke
  • Patent number: 11898559
    Abstract: A gear pump includes gears received within a housing defining an inlet, an outlet and end plates. The gears have shaft portions on each of two sides of each of the two gears. The shaft portions are mounted in journal bearings. The journal bearings each have a gear side face adjacent one of the two gears. A remote face is on a remote side of the journal bearing remote from each of the two gears. There is a plurality of heat pipes in at least one of the journal bearings. The heat pipes move heat from the gear face of the at least one of the journal bearings to the remote face. The plurality of heat pipes is enclosed by the housing, and extend generally in an axial direction from an end adjacent the gear face to an end adjacent the remote face. A fuel supply system is also disclosed.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: February 13, 2024
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Mark W. Shoemaker, Zachary Allen Ray Le Duc
  • Patent number: 11898560
    Abstract: The utility model relates to internal cycloidal gear mechanisms and can be used in various branches of mechanical engineering as working members of hydraulic machines (pumps and engines), compressors, internal combustion engines, as well as in planetary gearboxes, in particular in technical systems for drilling and repairing oil and gas wells. The problems to be solved by the utility model include the improvement of the quality of the process of designing working members having a cycloidal tooth profile, as well as the substantiation of the conditions for modifying cycloidal face profiles (by choosing the required combination of dimensionless gearing coefficients) in order to achieve the maximum or minimum open area of the gerotor mechanism having a different kinematic ratio.
    Type: Grant
    Filed: July 22, 2022
    Date of Patent: February 13, 2024
    Assignee: PERFOBORE INC.
    Inventors: Dmitry Fedorovich Baldenko, Fedor Dmitrievich Baldenko, Ilya Alexandrovich Lyagov, Alexander Vasilievich Lyagov, Yang Yao
  • Patent number: 11891994
    Abstract: A scroll compressor includes a housing; a motor provided in the housing; a rotating shaft rotated by the motor; an orbiting scroll orbitally moved by the rotating shaft; a fixed scroll forming a compression chamber together with the orbiting scroll; and a valve mechanism guiding intermediate pressure refrigerant from an outside of the housing to the compression chamber and discharging refrigerant overcompressed in the compression chamber into a discharge chamber, thereby increasing amount of refrigerant discharged from the compression chamber, and improving performance and efficiency.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: February 6, 2024
    Assignee: HANON SYSTEMS
    Inventors: Kyung Jae Lee, Jeong Ki Seo
  • Patent number: 11885333
    Abstract: A rubber compound for use in a stator. The stator may be deployed in a positive displacement motor. The rubber compound includes a fiber reinforcement, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”. In some embodiments, the rubber compound has a first value for 25% tensile Modulus across the grain and a second value for 25% tensile Modulus with the grain, wherein the first value is at least 10% lower than the second value. In such embodiments, the fiber reinforcement may further include a fiber loading of greater than 1.0 phr of fibers. In such embodiments, the rubber compound may further have a 25% tensile Modulus of greater than 400 psi across the grain and a 50% tensile Modulus of greater than 700 psi across the grain.
    Type: Grant
    Filed: December 28, 2022
    Date of Patent: January 30, 2024
    Assignee: Abaco Drilling Technologies LLC
    Inventors: Peter Thomas Cariveau, Robert Bohmer
  • Patent number: 11885331
    Abstract: A pump unit which has at least one high-pressure port and at least one low-pressure port, having a motor and a hydraulic pump which has at least one high-pressure outlet and at least one low-pressure outlet, wherein the high-pressure outlet is connected to the high-pressure port via at least one pressure-regulating valve.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: January 30, 2024
    Assignee: FTE AUTOMOTIVE GmbH
    Inventor: Wilhelm Heubner
  • Patent number: 11879460
    Abstract: A compressor may include first and second scrolls, an axial biasing chamber, and a control valve. The second scroll includes an outer port and an inner port. The outer and inner ports may be open to respective intermediate-pressure compression pockets. The control valve may be in fluid communication with the inner port, the outer port, and the axial biasing chamber. Movement of the control valve into the first position allows fluid communication between the inner port and the axial biasing chamber. Movement of the control valve into the second position allows fluid communication between the outer port and the axial biasing chamber.
    Type: Grant
    Filed: November 4, 2022
    Date of Patent: January 23, 2024
    Assignee: Copeland LP
    Inventor: Camden L. Ives
  • Patent number: 11879462
    Abstract: The present invention relates to a Moineau pump-type quantitative liquid-discharging apparatus including a stator in which a slot hole is formed, a main shaft including a first shaft part and a second shaft part, which are eccentric with respect to each other, and a rotor which extends from the first shaft part and is inserted into the slot hole, first and second slide bearings to which the first shaft part and the second shaft part are rotatably coupled, respectively, and first and second sliders which guide the first and second slide bearings to move in directions to cross each other, wherein the movement directions of the first and second slide bearings are perpendicular to an extension direction of the rotor.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: January 23, 2024
    Inventor: Hyuk Beom Yoon
  • Patent number: 11873817
    Abstract: A delivery port of a rotary-screw compressor includes a first opening having a profile configured to interrupt communication with a second working chamber of a suction process that opens only in the axial direction; a second opening connected to the first opening; and a third opening connected to the first and second openings. The profile of the first opening includes a first profile line that forms one of a pair of lateral edges of a lingulate protrusion; a second profile line that forms another one of the pair of the lateral edges of the protrusion; a third profile line that extends toward the reference point along the root circle of the female rotor; and a second connection line that connects the first and second profile lines. The second opening opens into the first opening at the second connection line. The third opening opens into the first groove.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: January 16, 2024
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Takeshi Tsuchiya, Kotaro Chiba, Masahiko Takano, Shigeyuki Yorikane, Kenji Morita
  • Patent number: 11873812
    Abstract: A rotary pump includes: a pump housing having a low-pressure inlet and a high-pressure outlet; a delivery rotor rotatable about a rotational axis and including multiple deliverers distributed over the circumference of the rotor for delivering a fluid from the low-pressure inlet to the high-pressure outlet; and a setting element for adjusting the delivery volume of the pump. The inlet end of the setting element includes a first circumferential portion which extends circumferentially in the rotational direction of the rotor and the axial width of which is smaller than the axial width of the deliverers and a second circumferential portion which adjoins the first circumferential portion in the rotational direction and the axial width of which is greater than the axial width of the first circumferential portion.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: January 16, 2024
    Assignee: Schwäbische Hüttenwerke Automotive GmbH
    Inventors: Moritz Raatschen, Thomas Finsterle, Fabian Eisele, Gerd Jäggle
  • Patent number: 11873815
    Abstract: A vane pump having an electric drive unit with a drive shaft, a pump chamber, a rotor arranged in the pump chamber so as to rotate about a rotational axis, and a driver that has at least one driver pin and is connected in a rotationally fixed manner to the drive shaft, wherein, in an operating state of the vane pump, the driver pin, by way of a contact surface of the driver pin designed as a section of a lateral surface, engages in a torque-transmitting manner with a contact surface of the rotor delimiting a rotor recess designed to correspond to the driver pin. In order to improve a vane pump, it is proposed that the contact surface of the rotor is designed and arranged in such a manner that the rotational axis lies in the contact surface when this contact surface is hypothetically extended toward the rotational axis.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: January 16, 2024
    Assignee: Hella GmbH & Co. KGaA
    Inventors: Sascha Bruemmer, Sebastian Gajda, Georg Goessmann, Theodor Hueser, Christian Koester, Dennis Marburg, Christian Praest
  • Patent number: 11873816
    Abstract: A rotary device includes a shaft, a rotor coupled to the shaft, and a stator having a cam surface. Vanes reside within slots of the rotary device and engage with the cam surface. A first seal couples to the rotor and includes first grooves that extend in a direction substantially parallel to a rotational axis of the shaft. A second seal couples to the stator and includes second grooves extending in the direction substantially parallel to the rotational axis. A third seal couples to the rotor and includes third grooves extending in the direction substantially parallel to the rotational axis. A fourth seal couples to the stator and includes fourth grooves extending in the direction substantially parallel to the rotational axis. The first grooves and the second grooves, as well as the third grooves and the fourth grooves, from labyrinth seals for the chambers of the rotary device.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: January 16, 2024
    Assignee: Regi U.S., Inc.
    Inventor: Paul Porter
  • Patent number: 11867182
    Abstract: A scroll compressor includes: a rotary shaft; a compression mechanism including an orbiting scroll and a non-orbiting scroll, an extension portion of the orbiting scroll engaging with an eccentric structure of the rotary shaft via a bushing and a driving bearing having an axial height L1; and a counterweight located on the bushing, a mass center of the counterweight being located above an axial lower end of the driving bearing and having an axial distance L2 to the axial center of the driving bearing, and the ratio R of the axial distance L2 to the axial height L1 satisfying: 0.1?R?0.4. The scroll compressor can reduce the contact and wear between the bushing and the driving bearing and reduce the requirements for the manufacturing precision and the mounting precision of components such as the counterweight and the bushing, achieving optimized system design.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: January 9, 2024
    Assignee: Copeland Climate Technologies (Suzhou) Co. Ltd.
    Inventors: Xiangmin Jia, Yan Qin, Xu Cheng
  • Patent number: 11859614
    Abstract: A reversible gerotor pump system is provided. The gerotor pump system includes a cylindrical housing with a 180° slot, an eccentric ring with a locking pin fixed thereto and movably engaged in the slot; an outer rotor and inner rotor with meshed teeth, and shaft for driving inner rotor and system. The eccentric ring has a convex profile on the outer diameter. A positive contact system, which can be a spring-and-plunger system or frictional disc brake system is provided to increase frictional force between the eccentric ring and the outer rotor. The locking pin moves in the slot with clearance at both rotation directions to provide a self-damping effect. The suction port has prolongations at both upstream and the downstream sides to increase filling time such that the pump can have a fill speed of above 5000 rpm, and the volumetric efficiency is at least 90% at 5000 rpm.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: January 2, 2024
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Hemant Rajaram Kadam, Vipin Nivrutti Rane, Shrikrishna Deshpande, Mayur Keshav Bhure, Satalingayya C. Hiremath, Shivayogi Sidram Salutagi, Rohit Kumar Maurya