Patents by Inventor Dominique Costaz
Dominique Costaz 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).
-
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
-
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
-
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
-
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
-
Patent number: 10697442Abstract: The machine comprises distribution ducts connected to respective ones of first, second, and third enclosures (40, 42, 44), and a cylinder-capacity selector (21) suitable for being caused to take up a large cylinder capacity configuration in which the second enclosure (42) is connected to one of the main ducts (2), while the first and third enclosures (40, 44) are connected to the other main duct (1), and a small cylinder capacity configuration in which the second and third enclosures (42, 44) are connected to said one of the main ducts (2), while the first enclosure is connected to the other main duct (1). The machine further comprises a safety valve (150) having at least a first port (56) connected to said one of the main ducts (2), and a second port (58) connected to the third enclosure (44).Type: GrantFiled: October 27, 2016Date of Patent: June 30, 2020Assignee: POCLAIN HYDRAULICS INDUSTRIEInventors: Loic Bonnard, Dominique Costaz, Julien Viard
-
Patent number: 10690109Abstract: The devices comprises a distributor (16) that presents distribution ducts opening out into a radial distribution face (16A), and a distributor-counterpart engaged in each other in such a manner that two main enclosures (18, 20) are provided between their opposite axially-extending faces. The device comprises a cylinder-capacity selector comprising two slides (24, 26) arranged after the other in a bore (22) of the element engaged in the other, to which are connected the main enclosures (18, 20) and at least some of the distribution ducts (30, 31). The slides are able to adopt at least three distinct configurations establishing different connections between the main ducts (18, 20) and the distribution ducts via the main enclosures, in order to be able to obtain at least three distinct operating cylinder capacities.Type: GrantFiled: November 1, 2016Date of Patent: June 23, 2020Assignee: POCLAIN HYDRAULICS INDUSTRIEInventors: Dominique Costaz, Loic Bonnard, Julien Viard
-
Patent number: 10183334Abstract: A selection system, comprising: a sheath defining an internal housing extending in a longitudinal direction; a link rod disposed in said internal housing, and extending in the longitudinal direction; and a selection slide mounted to slide in the internal housing, about the link rod; the link rod being held stationary relative to the sheath against movement in translation in the longitudinal direction by stop means; the system being characterized in that the stop means comprise: a base that is a body of revolution and includes a conical portion; and a shell comprising two shell portions each including a conical portion configured to come to bear in plane manner against the conical portion of the base.Type: GrantFiled: May 31, 2017Date of Patent: January 22, 2019Assignee: POCLAIN HYDRAULICS INDUSTRIEInventors: Loic Bonnard, Dominique Costaz, Julien Viard
-
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
-
Publication number: 20170348773Abstract: A selection system, comprising: a sheath defining an internal housing extending in a longitudinal direction; a link rod disposed in said internal housing, and extending in the longitudinal direction; and a selection slide mounted to slide in the internal housing, about the link rod; the link rod being held stationary relative to the sheath against movement in translation in the longitudinal direction by stop means; the system being characterized in that the stop means comprise: a base that is a body of revolution and includes a conical portion; and a shell comprising two shell portions each including a conical portion configured to come to bear in plane manner against the conical portion of the base.Type: ApplicationFiled: May 31, 2017Publication date: December 7, 2017Applicant: POCLAIN HYDRAULICS INDUSTRIEInventors: Loic BONNARD, Dominique COSTAZ, Julien VIARD
-
Publication number: 20170130693Abstract: The devices comprises a distributor (16) that presents distribution ducts opening out into a radial distribution face (16A), and a distributor-counterpart engaged in each other in such a manner that two main enclosures (18, 20) are provided between their opposite axially-extending faces. The device comprises a cylinder-capacity selector comprising two slides (24, 26) arranged after the other in a bore (22) of the element engaged in the other, to which are connected the main enclosures (18, 20) and at least some of the distribution ducts (30, 31). The slides are able to adopt at least three distinct configurations establishing different connections between the main ducts (18, 20) and the distribution ducts via the main enclosures, in order to be able to obtain at least three distinct operating cylinder capacities.Type: ApplicationFiled: November 1, 2016Publication date: May 11, 2017Applicant: POCLAIN HYDRAULICS INDUSTRIEInventors: Dominique COSTAZ, Loic BONNARD, Julien VIARD
-
Publication number: 20170122285Abstract: The machine comprises distribution ducts connected to respective ones of first, second, and third enclosures (40, 42, 44), and a cylinder-capacity selector (21) suitable for being caused to take up a large cylinder capacity configuration in which the second enclosure (42) is connected to one of the main ducts (2), while the first and third enclosures (40, 44) are connected to the other main duct (1), and a small cylinder capacity configuration in which the second and third enclosures (42, 44) are connected to said one of the main ducts (2), while the first enclosure is connected to the other main duct (1). The machine further comprises a safety valve (150) having at least a first port (56) connected to said one of the main ducts (2), and a second port (58) connected to the third enclosure (44).Type: ApplicationFiled: October 27, 2016Publication date: May 4, 2017Applicant: POCLAIN HYDRAULICS INDUSTRIEInventors: Loic BONNARD, Dominique COSTAZ, Julien VIARD
-
Patent number: 8696070Abstract: A hydraulic braking valve having an inlet orifice intended to be connected to a pressure supply, an outlet orifice intended to be connected to a braking unit, a leak orifice intended to be connected to a tank, a power distributor adapted so as to connect the inlet orifice to the outlet orifice in a braking configuration, and a leak orifice to the outlet orifice in a rest configuration. The power distributor is driven by two independently driven calibrators.Type: GrantFiled: December 15, 2011Date of Patent: April 15, 2014Assignee: Poclain Hydraulics IndustrieInventors: Dominique Costaz, Fabien Roger
-
Publication number: 20120205203Abstract: The present invention relates to a hydraulic braking valve (22) comprising: an inlet orifice intended to be connected to a pressure supply means (23), an outlet orifice intended to be connected to a braking means (25), a leak orifice intended to be connected to a tank (24), a power distributor (26) adapted so as to connect the inlet orifice to the outlet orifice in a braking configuration, and a leak orifice to the outlet orifice in a rest configuration, said braking valve (22) being characterized in that the power distributor (26) is driven by two independently driven calibration means.Type: ApplicationFiled: December 15, 2011Publication date: August 16, 2012Inventors: Dominique Costaz, Fabien Roger
-
Patent number: 8141579Abstract: A valve including a valve body having an inlet port and an outlet port, a valve stem, a valve seat, an opening control chamber for the valve stem, which chamber, by being fed with fluid, urges the valve stem to move towards the open position of the valve, a return spring of opposing effect, and a piston suitable for sliding in the body so as to urge contact to be established between the valve stem and the seat. The valve seat is formed on the piston, which piston is provided with a bore in which the valve stem is in its closure movement, the fluid flows out via a constriction from a damping chamber.Type: GrantFiled: October 20, 2006Date of Patent: March 27, 2012Assignee: Poclain Hydraulics IndustrieInventors: Dominique Costaz, Alain Mangano
-
Publication number: 20080230729Abstract: A valve including a valve body having an inlet port and an outlet port, a valve stem, a valve seat, an opening control chamber for the valve stem, which chamber, by being fed with fluid, urges the valve stem to move towards the open position of the valve, a return spring of opposing effect, and a piston suitable for sliding in the body so as to urge contact to be established between the valve stem and the seat. The valve seat is formed on the piston, which piston is provided with a bore in which the valve stem is in its closure movement, the fluid flows out via a constriction from a damping chamber.Type: ApplicationFiled: October 20, 2006Publication date: September 25, 2008Inventors: Dominique Costaz, Alain Mangano