Patents by Inventor Julien ENGRAND
Julien ENGRAND has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11788591Abstract: 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: GrantFiled: April 29, 2019Date of Patent: October 17, 2023Assignee: POCLAIN HYDRAULICS INDUSTRIEInventors: Gilles Grillon, Loic Bonnard, Dominique Costaz, Julien Engrand, Philippe Telega
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Publication number: 20230193885Abstract: 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: ApplicationFiled: May 10, 2021Publication date: June 22, 2023Applicant: Poclain Hydraulics IndustrieInventors: Julien Engrand, Gilles Grillon, Stéphane Quertelet
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Publication number: 20230175496Abstract: The rotating hydraulic machine (102) comprises: —a housing (10), —a shaft (20) movably mounted relative to the housing about an axis, —an apron (24) rigidly connected to the shaft and extending around at least a portion of the housing, —a cam (12) rigidly connected to either the housing or the shaft, —a cylinder block (42) rotationally connected to the other of either the housing or the shaft, the cylinder block comprising pistons capable of engaging with the cam to produce a relative rotation between the shaft and the housing, —first and second guide bearings (28) each bearing directly on the housing and the apron, and —at least a third guide bearing (37) bearing directly on the housing and the cylinder block.Type: ApplicationFiled: June 8, 2021Publication date: June 8, 2023Inventors: Julien ENGRAND, Gilles GRILLON, Stéphane, Bernard QUERTELET, Jérémy Gérard RESPECTE, Philippe LUCIENNE, Patrick JALABERT, Adam FREY, Scott GLODOWSKY
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Publication number: 20230147694Abstract: The hydraulic machine comprises: —a fixed part, —a part mounted so as to rotate about an axis (O-O) with respect to the fixed part, —a stack (50) of discs (53, 54) forming a brake or clutch, the discs being able to be in abutment against one another by way of friction surfaces (88) having a mean friction radius (Rf) with respect to the axis, —a push rod (80) that is able to push the discs into abutment against one another, in a direction parallel to the axis, over a thrust surface (4), the thrust surface having a mean thrust radius (Rp) with respect to the axis which extends to within or beyond the mean friction radius (Rf). The push rod (80) has a radial annular notch (90) indenting the push rod from an opposite side of the push rod from the axis (O-O) when the mean thrust radius (Rp) extends beyond the mean friction radius (Rf), and otherwise from the side of the push rod closest to the axis.Type: ApplicationFiled: March 24, 2021Publication date: May 11, 2023Inventors: Gilles GRILLON, Julien ENGRAND, Jérémy Gérard RESPECTE, Dominique COSTAZ, Loïc BONNARD
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Publication number: 20230097920Abstract: 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: ApplicationFiled: February 22, 2021Publication date: March 30, 2023Applicant: Poclain Hydraulics IndustrieInventors: Gilles Grillon, Julien Engrand
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Patent number: 11067144Abstract: A hydraulic apparatus comprising a casing (1) having arranged therein a hydraulic machine (2), a shaft (4) mounted to rotate relative to the casing (1) by means of a bearing (5), a braking system (3) having a plurality of brake disks (31, 34) configured to prevent the shaft (4) rotating relative to the casing (1) in selective manner, and a control system (6, 7) for controlling said braking disks (31, 34), the hydraulic system including an irrigation system adapted to cool said brake disks (31, 34) by means of a fluid, the irrigation system including a fluid inlet (81) and a fluid outlet (82), the hydraulic system being characterized in that the fluid inlet and outlet (81, 82) of the irrigation system define a fluid flow within the casing in which the braking system (3) is downstream from the hydraulic machine (2).Type: GrantFiled: July 12, 2017Date of Patent: July 20, 2021Assignee: POCLAIN HYDRAULICS INDUSTRIEInventors: Julien Engrand, Jean-Philippe Raisin, Stéphane Vidal, Aurélien Ulmer, Dominique Costaz
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Publication number: 20210123488Abstract: 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: ApplicationFiled: April 29, 2019Publication date: April 29, 2021Inventors: Gilles Grillon, Loic Bonnard, Dominique Costaz, Julien Engrand, Philippe Telega
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Patent number: 10364792Abstract: A hydraulic machine (1) comprising first and second brake elements (92, 93), a spring washer (65) tending to urge the first and second brake elements (92, 93) in a braking direction, and a brake release piston (61) configured to act on the spring washer (65) in a direction opposing the braking direction, the hydraulic machine being characterized in that the brake release piston (61) comprises a primary brake release piston (61a) associated with a primary brake release chamber (62a), and a secondary brake release piston (61b) associated with a secondary brake release chamber (62b), said primary and secondary chambers (62a, 62b) extending radially around the shaft (2) in such a manner that projections of the primary brake release chamber (62a) and of the secondary brake release chamber (62b) onto a plane perpendicular to a longitudinal axis (X-X) defined by the axis of rotation of the hydraulic machine (1) are superposed, at least in part.Type: GrantFiled: September 22, 2017Date of Patent: July 30, 2019Assignee: POCLAIN HYDRAULICS INDUSTRIEInventors: Julien Engrand, Stéphane Vidal, Gilles Grillon, Bertrand Bonnomet
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Publication number: 20180087486Abstract: A hydraulic machine (1) comprising first and second brake elements (92, 93), a spring washer (65) tending to urge the first and second brake elements (92, 93) in a braking direction, and a brake release piston (61) configured to act on the spring washer (65) in a direction opposing the braking direction, the hydraulic machine being characterized in that the brake release piston (61) comprises a primary brake release piston (61a) associated with a primary brake release chamber (62a), and a secondary brake release piston (61b) associated with a secondary brake release chamber (62b), said primary and secondary chambers (62a, 62b) extending radially around the shaft (2) in such a manner that projections of the primary brake release chamber (62a) and of the secondary brake release chamber (62b) onto a plane perpendicular to a longitudinal axis (X-X) defined by the axis of rotation of the hydraulic machine (1) are superposed, at least in part.Type: ApplicationFiled: September 22, 2017Publication date: March 29, 2018Inventors: Julien ENGRAND, Stéphane VIDAL, Gilles GRILLON, Bertrand BONNOMET
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Publication number: 20180017117Abstract: A hydraulic apparatus comprising a casing (1) having arranged therein a hydraulic machine (2), a shaft (4) mounted to rotate relative to the casing (1) by means of a bearing (5), a braking system (3) having a plurality of brake disks (31, 34) configured to prevent the shaft (4) rotating relative to the casing (1) in selective manner, and a control system (6, 7) for controlling said braking disks (31, 34), the hydraulic system including an irrigation system adapted to cool said brake disks (31, 34) by means of a fluid, the irrigation system including a fluid inlet (81) and a fluid outlet (82), the hydraulic system being characterized in that the fluid inlet and outlet (81, 82) of the irrigation system define a fluid flow within the casing in which the braking system (3) is downstream from the hydraulic machine (2).Type: ApplicationFiled: July 12, 2017Publication date: January 18, 2018Applicant: POCLAIN HYDRAULICS INDUSTRIEInventors: Julien ENGRAND, Jean-Philippe RAISIN, Stéphane VIDAL, Aurélien ULMER, Dominique COSTAZ