Patents Assigned to Poclain Hydraulics Industrie
  • Publication number: 20250075792
    Abstract: A propulsion system for vehicle propulsion component having a variable displacement hydraulic pump, a hydraulic motor, adapted to drive the rotation of the propulsion component, an electric motor, adapted to drive the hydraulic pump, a source of electric power, and a controller configured, as a function of a setpoint value, to control the displacement of the hydraulic pump and the rotational speed of the electric motor so as to achieve the setpoint value while maintaining a rotational speed of the electric motor greater than a lower threshold value.
    Type: Application
    Filed: December 22, 2022
    Publication date: March 6, 2025
    Applicant: POCLAIN HYDRAULICS INDUSTRIE
    Inventor: Loris TAXIL
  • Patent number: 12241551
    Abstract: A hydraulic machine has a first assembly and a second assembly movable in rotation relative to each other about an axis of rotation. The first assembly and the second assembly define an internal volume and are in contact along an interface. The interface between the first assembly and the second assembly is provided with a sealing element positioned in a housing connected to the internal volume via a first duct, and to the surrounding environment via a second duct. The first duct is provided with a sealing element adapted to isolate the housing from the internal volume, where a secondary cavity is formed in the first assembly or in the second assembly. The secondary cavity is connected to the housing and isolated from the internal volume.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: March 4, 2025
    Assignee: Poclain Hydraulics Industrie
    Inventors: Adam Frey, Patrick Jalabert, Laurent Naceur
  • Publication number: 20250058751
    Abstract: A brake valve has a main body, a shaft movable within the main body, a spool plate, a first spring and a second spring arranged within the main body. The spool plate is movable between a release configuration and a brake configuration where the shaft is adapted to be linked with a first actuator configured to slide the shaft. The brake valve has a command fluid port connected to a brake chamber. A valve ring defines the brake chamber with the main body and the shaft. The valve ring is configured to, when a pilot pressure is applied in the brake chamber, move the shaft towards the actuated position or push the second spring so as to move the spool plate towards the brake configuration.
    Type: Application
    Filed: December 13, 2022
    Publication date: February 20, 2025
    Applicant: POCLAIN HYDRAULICS INDUSTRIE
    Inventor: Matjaž RUPNIK
  • Publication number: 20250060033
    Abstract: A process for start-up of a propulsion system for a vehicle displacement component. The propulsion system includes a hydraulic pump, a hydraulic motor fed by the hydraulic pump via a closed-loop hydraulic circuit, and an electric motor. The process for start-up includes the following steps, given a configuration when the propulsion system is at a standstill, in which the electric motor, the hydraulic pump and the feed pump are at a standstill, and the hydraulic motor is disengaged: start-up of the feed pump, starting up of the electric motor, setting in rotation of the hydraulic pump, adjustment of the displacement of the hydraulic pump and/or of the rotational speed of the electric motor for providing a flow rate corresponding to a setpoint on the hydraulic motor, start-up of the hydraulic motor.
    Type: Application
    Filed: December 22, 2022
    Publication date: February 20, 2025
    Applicant: POCLAIN HYDRAULICS INDUSTRIE
    Inventor: Loris TAXIL
  • Patent number: 12215678
    Abstract: A hydraulic machine including an improved sweep circuit, adapted to form a primary sweep stream circulating from an inlet orifice successfully in a proximal portion, in a middle portion and in a distal portion of the hydraulic machine, then in the middle portion and in the proximal portion up to an outlet orifice.
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: February 4, 2025
    Assignee: Poclain Hydraulics Industrie
    Inventors: Sebastien Gonzalez, Julien Engrand, Loic Bonnard
  • Patent number: 12196201
    Abstract: The present invention concerns a hydraulic pressure amplifier device comprising a casing (10) having two chambers (12, 14) of different cross-sections which house a staged piston (20) comprising two piston sections (22, 24) with cross-sections respectively el matching the chambers (12, 14), and means (30) for controlling the movement of the piston (20), characterised by the fact that the control means (30) are formed of an electronic control driven by means for estimating the ends-of-stroke of the piston (20) without an end-of-stroke sensor or mechanical stop.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: January 14, 2025
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventors: Andre Prigent, Jean Heren, Benjamin Tenaud
  • Publication number: 20240384788
    Abstract: A method for controlling the traction of a vehicle hydraulic assistance circuit, including a target pressure is applied, a setpoint pressure and a theoretical value of a parameter are determined, a pressure setpoint is applied to the hydraulic pump, equal to the setpoint pressure, and an actual value is measured in the hydraulic assistance circuit. The actual value measured in the hydraulic assistance circuit is compared to the theoretical value, and if a gap between the actual value and the theoretical value is greater than a threshold value, a step of adjusting the setpoint is carried out in which the pressure setpoint of the hydraulic pump is modified so that it is equal to an actual pressure, to within an adjustment coefficient.
    Type: Application
    Filed: September 14, 2022
    Publication date: November 21, 2024
    Applicant: Poclain Hydraulics Industrie
    Inventors: Loris Taxil, Claude Didierjean, Christophe Patte
  • Patent number: 12135088
    Abstract: A casing for a rotating machine includes a first fixed segment, and a second segment rotating along an axis of rotation (X-X). The first segment and the second segment are in contact along an interface provided with a sealing element. The sealing element is positioned in a housing connected to the internal volume of the casing, and also to the surrounding medium. The connection between the housing and the surrounding medium is made via a duct. The first casing segment or the second casing segment has a planer positioned at an outer end of the duct.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: November 5, 2024
    Assignee: Poclain Hydraulics Industrie
    Inventors: Gilles Grillon, Julien Engrand
  • Patent number: 12090787
    Abstract: An assembly including a hydraulic device around a second axis of rotation by means of a proximal rolling-element bearing and a distal rolling-element bearing, the hydraulic device including a shaft, a multi-lobe cam, a cylinder block and a distributor, and a pivoting element adapted to be mounted on an axle, and movable in rotation relative to the hydraulic device around a first axis of rotation. Views along a plane defined by the second axis of rotation and the first axis of rotation, the proximal rolling-element bearing and the distal rolling-element bearing are positioned on either side of the first axis of rotation, in that the cylinder block is positioned between the first axis of rotation and the proximal rolling-element bearing.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: September 17, 2024
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventors: Adam Frey, Stéphane Vidal, Nicolas Weber, Sylvain Michon, Jasraj Singh
  • Patent number: 12084010
    Abstract: A method for driving a braking circuit for a vehicle equipped with a coupling is disclosed. The vehicle includes a hydraulic supply circuit and a hydraulic control circuit equipped with a driving device. The coupling includes a hydraulic braking circuit linked to the hydraulic supply circuit and to the hydraulic control circuit and includes a hydraulic accumulator. When the vehicle is stopped and the pressure inside the hydraulic accumulator is less than or equal to a threshold pressure value, the driving device increases the pressure of the hydraulic accumulator via the hydraulic control circuit.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: September 10, 2024
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventor: André Prigent
  • Publication number: 20240247635
    Abstract: A hydraulic machine including an improved sweep circuit, adapted to form a primary sweep stream circulating from an inlet orifice successfully in a proximal portion, in a middle portion and in a distal portion of the hydraulic machine, then in the middle portion and in the proximal portion up to an outlet orifice.
    Type: Application
    Filed: May 9, 2022
    Publication date: July 25, 2024
    Applicant: Poclain Hydraulics Industrie
    Inventors: Sebastien Gonzalez, Julien Engrand, Loic Bonnard
  • Publication number: 20240044279
    Abstract: A system having a primary machine, a hydraulic machine, and a frequency converter disposed in an assembly casing. The system further includes a cooling circuit, suitable for a same coolant to traverse a plurality of ducts suitable for cooling the primary machine, the frequency converter, and the hydraulic machine.
    Type: Application
    Filed: December 2, 2021
    Publication date: February 8, 2024
    Applicant: Poclain Hydraulics Industrie
    Inventor: Jean Heren
  • Patent number: 11827198
    Abstract: A method for driving a parking brake of a vehicle (V) wherein: for a setpoint between 0 and C1, the control pressure (200) is zero, and the supplementary pressure (100) is non—zero constant; for a setpoint between C1 and C3, the control pressure is proportional to the setpoint, for a setpoint between C2 and Cmax, the supplementary pressure is zero; said values being such that 0<C1<C2<Cmax, and 0<C1<C3<Cmax.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: November 28, 2023
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventor: André Prigent
  • Patent number: 11788591
    Abstract: A braking device may include a brake casing rotatably assembled with respect to a shaft along an axis of rotation, first braking elements and second braking elements, forming a stack, an elastic return element configured to exert an application force on the first and second braking elements, and a brake release actuator, adapted to bias the elastic return element along a direction opposing the application direction. The braking device a may include a diffusion wedge and a pressure wedge positioned respectively to bear against the stack and against the elastic return element. The diffusion wedge and the pressure wedge may have contact surfaces defining an annular linear contact about the axis of rotation.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: October 17, 2023
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventors: Gilles Grillon, Loic Bonnard, Dominique Costaz, Julien Engrand, Philippe Telega
  • Publication number: 20230204106
    Abstract: A hydraulic machine has a first assembly and a second assembly movable in rotation relative to each other about an axis of rotation. The first assembly and the second assembly define an internal volume and are in contact along an interface. The interface between the first assembly and the second assembly is provided with a sealing element positioned in a housing connected to the internal volume via a first duct, and to the surrounding environment via a second duct. The first duct is provided with a sealing element adapted to isolate the housing from the internal volume, where a secondary cavity is formed in the first assembly or in the second assembly. The secondary cavity is connected to the housing and isolated from the internal volume.
    Type: Application
    Filed: May 24, 2021
    Publication date: June 29, 2023
    Applicant: Poclain Hydraulics Industrie
    Inventors: Adam Frey, Patrick Jalabert, Laurent Naceur
  • Publication number: 20230193885
    Abstract: A hydraulic machine has a first assembly and a second assembly movable in rotation relative to each other along an axis of rotation. The hydraulic machine has a crankcase defining an internal volume, in which an interface between the fixed assembly and the movable assembly has a housing provided with a first sealing element ensuring the sealing of the internal volume relative to the external environment. A second sealing element is positioned between the internal volume and the housing. The second sealing element is adapted to allow a passage of fluid from the internal volume to the housing when the pressure deviation between the internal volume and the housing is less than or equal to a threshold value, and to isolate the housing from the internal volume when the pressure deviation is greater than the threshold value.
    Type: Application
    Filed: May 10, 2021
    Publication date: June 22, 2023
    Applicant: Poclain Hydraulics Industrie
    Inventors: Julien Engrand, Gilles Grillon, Stéphane Quertelet
  • Patent number: 11654728
    Abstract: The invention relates to an assembly including a hydraulic apparatus having a rotor and a stator. The rotor is mounted so as to turn about a second rotation axis with respect to the stator and is secured to a device suitable for mounting a vehicle wheel. A pivot-pin element is intended to be mounted on an axle and is mounted so as to rotate about a first rotation axis with respect to the hydraulic apparatus. The stator is mounted so as to turn about the first rotation axis with respect to the axle. An air chamber is formed between the pivot-pin element and the hydraulic apparatus, the air chamber is connected to a distribution passage formed in the hydraulic apparatus. An axle passage is formed in the pivot-pin element so as to form a pneumatic passage between the pivot-pin element and the hydraulic apparatus.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 23, 2023
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventors: Adam Frey, Homer Hawk, Sylvain Michon
  • Publication number: 20230097920
    Abstract: A casing for a rotating machine includes a first fixed segment, and a second segment rotating along an axis of rotation (X-X). The first segment and the second segment are in contact along an interface provided with a sealing element. The sealing element is positioned in a housing connected to the internal volume of the casing, and also to the surrounding medium. The connection between the housing and the surrounding medium is made via a duct. The first casing segment or the second casing segment has a planer positioned at an outer end of the duct.
    Type: Application
    Filed: February 22, 2021
    Publication date: March 30, 2023
    Applicant: Poclain Hydraulics Industrie
    Inventors: Gilles Grillon, Julien Engrand
  • Publication number: 20230027957
    Abstract: A vehicle drive assistance system equipped with an open hydraulic circuit has a hydraulic pump, a hydraulic motor and a reservoir. The system has a three-position valve suitable for: in a first position, supplying the hydraulic motor in a first direction of operation; in a second position, fluidly isolating the hydraulic motor from the hydraulic pump and connecting the hydraulic motor to the reservoir; and in a third position, supplying the hydraulic motor in a second direction of operation. A flow controller is positioned between the hydraulic pump and the three-position valve. The flow controller is configured in such a way as to selectively allow or not allow the passage of fluid through the supply duct of the hydraulic pump toward the three-position valve.
    Type: Application
    Filed: December 7, 2020
    Publication date: January 26, 2023
    Applicant: Poclain Hydraulics Industrie
    Inventors: Cyrille D'Hersignerie, Loris Taxil, Christophe Patte
  • Patent number: 11498411
    Abstract: The invention relates to a hydraulic device including: a stator and a rotor, in which the rotor can rotate relative to the stator about a first axis of rotation; and a shaft mounted on the rotor such as to rotate therewith. The shaft has a wheel carrier provided at a proximal end thereof and designed to receive a rim and a tire. The shaft includes a through-channel extending from the proximal end to an opposing distal end. The hydraulic device includes an air chamber formed at the distal end of the shaft and connected to the through-channel. The through-channel and air chamber are produced such as to allow a flow of air in order to control the pressure of a tire.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: November 15, 2022
    Assignee: POCLAIN HYDRAULICS INDUSTRIE
    Inventors: Adam Frey, Sylvain Michon, Stéphane Vidal