Patents by Inventor Carola Diebold
Carola Diebold 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: 10570878Abstract: An adjusting device for an axial piston machine includes an actuating piston that delimits an actuating space configured to be connected to a control oil source or a control oil drain via a control valve. A control piston of the control valve is loaded firstly by a control spring and secondly by a spring arrangement that is also in active engagement with the actuating piston.Type: GrantFiled: November 21, 2013Date of Patent: February 25, 2020Assignee: Robert Bosch GmbHInventors: Carola Diebold, Andreas Apperger
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Patent number: 10180130Abstract: An electroproportionally controlled differential pressure valve cartridge includes actuation and tank ports on an outer circumference, and a pump port on a face-side. A spring preloads a piston into a position that relieves pressure from the actuation port to the tank port. A current increase through an electromagnet opposite the pump port and a pressure increase at the pump port counter the spring to open a connection from the pump port to the actuation port. A concentric opening extends from the pump port to a first piston surface. A duct extends from the first piston surface to a pump chamber. A further duct extends from the pump port to a spring chamber between the pump chamber and electromagnet. In the spring chamber, pressure over a second piston surface counters pressure over the first piston surface.Type: GrantFiled: February 11, 2015Date of Patent: January 15, 2019Assignee: Robert Bosch GmbHInventors: Nadine Klausmann, Fabian Ruethschilling, Andreas Apperger, Carola Diebold
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Patent number: 10100817Abstract: A hydraulic axial-piston machine achieves a control cut-off by an additional control edge of a control valve of an actuating mechanism for swiveling a swash plate.Type: GrantFiled: November 26, 2014Date of Patent: October 16, 2018Assignee: Robert Bosch GmbHInventor: Carola Diebold
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Patent number: 10072654Abstract: An electroproportional pressure control valve of cartridge-type construction is screwed into a housing bore of a hydrostatic pump. The cartridge includes an adjusting pressure port, a pump port, and a tank port. The adjusting pressure port is relieved to the tank port in a normal position of a spring-biased valve plunger of the pressure control valve. A connection from the pump port to the adjusting pressure port is opened counter to the force of the spring by increasing a current of an electromagnet and increasing the pump pressure at the pump port. The spring, the electromagnet, and the resultant force of the pump pressure act along a common axis of movement of the valve plunger. A first nozzle connects the adjusting pressure port to an adjusting pressure chamber. A second nozzle connects the adjusting pressure port to the tank port.Type: GrantFiled: February 18, 2015Date of Patent: September 11, 2018Assignee: Robert Bosch GmbHInventors: Johannes Offenburger, Carola Diebold, Friedemann Nordt
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Patent number: 10054112Abstract: An adjustment device for regulating torque of a hydrostatic piston machine includes a piston delimiting a chamber, a regulation valve, feedback and regulation springs, and a member. The valve has a displaceable slide to enable pressure medium to flow into or out of the chamber, a measurement surface acted on by pressure from the piston machine, and a bore open to the chamber, a side facing the chamber acted on by a chamber pressure in a first direction. The feedback spring exerts force on the slide in the first direction, depending on a position of the piston. The regulation spring exerts force on the slide in a second direction opposite the first direction. The member has a surface as large as the side of the bore such that the chamber pressure exerts force on the slide in the second direction.Type: GrantFiled: May 21, 2015Date of Patent: August 21, 2018Assignee: Robert Bosch GmbHInventors: Nadine Klausmann, Benjamin Weihing, Andreas Apperger, Carola Diebold, Philipp Schramm, Ruslan Rudik
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Adjustment device for an axial piston machine and hydraulic machine having such an adjustment device
Patent number: 9518569Abstract: An adjustment device for a pivoting cradle of a hydraulic machine, in particular of an axial piston machine, is disclosed. Said adjustment device has an actuating piston to which pressure medium for pivoting the pivoting cradle about a pivoting axis is applied via an actuating pressure space. In order to control the feeding in of pressure medium and the relieving of the actuating pressure space, a control valve is provided. Said control valve has a control piston configured to be adjusted by an electric actuator, wherein the electric actuator is controlled by a control device. In this context, the control device controls the electric actuator as a function of a control difference formed from a setpoint pivoting angle and an actual pivoting angle of the pivoting cradle. The actual pivoting angle of the pivoting cradle is fed back electrically to the control device here.Type: GrantFiled: November 8, 2013Date of Patent: December 13, 2016Assignee: Robert Bosch GmbHInventors: Joern Howind, Carola Diebold, Rolf Springmann -
Patent number: 9441747Abstract: A pressure/flow regulator includes a pressure control valve, a flow control valve, and a first control connection configured to set a variable displacement pump. The control connection is configured to be discharged to a tank by the flow control valve via a control edge of the pressure control valve that is open in the idle position of a valve piston of the pressure control valve.Type: GrantFiled: March 30, 2011Date of Patent: September 13, 2016Assignee: Robert Bosch GmbHInventors: Christian Spielvogel, Friedemann Nordt, Carola Diebold
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Patent number: 9399985Abstract: A hydraulic valve arrangement, in particular a control valve arrangement, of a hydraulic machine, in particular a hydraulic pump, includes at least one valve with a valve body penetrated by a pressure medium passage. The pressure medium passage has a minimum cross section that gives rise, in normal operation, to a control pressure downstream of the minimum cross section in accordance with a pressure acting at a pressure port of the valve. The minimum cross section is arranged close to a pressure medium passage mouth which is arranged upstream or is configured to be subjected to the high pressure. A hydraulic machine arrangement, in particular a pump arrangement, includes the hydraulic valve arrangement.Type: GrantFiled: October 17, 2013Date of Patent: July 26, 2016Assignee: Robert Bosch GmbHInventors: Martin Sewcz, Friedemann Nordt, Carola Diebold
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Patent number: 9280160Abstract: A regulating valve, in particular an electroproportional pivot-angle regulator for a variable-displacement pump, includes a piston bore formed in a valve housing and a regulating piston guided in the piston bore. The regulating piston is configured to be actuated in an adjusting direction via an actuator, in particular via a lifting magnet. The regulating piston is acted upon in the opposite direction by a spring force of a counterspring. The counterspring is supported via a spring plate on a supporting spring which is supported on the valve housing. The spring plate is tensioned between the supporting spring and an adjusting device by which the spring plate is configured to be displaced in relation to the valve housing in or opposite to the adjusting direction.Type: GrantFiled: November 20, 2013Date of Patent: March 8, 2016Assignee: Robert Bosch GmbHInventors: Carola Diebold, Andreas Apperger
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Patent number: 9268339Abstract: A hydraulic valve arrangement, in particular a control valve arrangement of an axial piston machine, includes at least two valves that have springs supported in each case on a spring seat. The two spring seats are connected to one another with a material-to-material fit in one or more of a non-positive manner and a positively locking manner.Type: GrantFiled: October 18, 2013Date of Patent: February 23, 2016Assignee: Robert Bosch GmbHInventors: Friedemann Nordt, Carola Diebold, Dieter Lohmiller
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Publication number: 20150337814Abstract: An adjustment device for regulating torque of a hydrostatic piston machine includes a piston delimiting a chamber, a regulation valve, feedback and regulation springs, and a member. The valve has a displaceable slide to enable pressure medium to flow into or out of the chamber, a measurement surface acted on by pressure from the piston machine, and a bore open to the chamber, a side facing the chamber acted on by a chamber pressure in a first direction. The feedback spring exerts force on the slide in the first direction, depending on a position of the piston. The regulation spring exerts force on the slide in a second direction opposite the first direction. The member has a surface as large as the side of the bore such that the chamber pressure exerts force on the slide in the second direction.Type: ApplicationFiled: May 21, 2015Publication date: November 26, 2015Inventors: Nadine Klausmann, Benjamin Weihing, Andreas Apperger, Carola Diebold, Philipp Schramm, Ruslan Rudik
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Publication number: 20150240961Abstract: An electroproportional pressure control valve of cartridge-type construction is screwed into a housing bore of a hydrostatic pump. The cartridge includes an adjusting pressure port, a pump port, and a tank port. The adjusting pressure port is relieved to the tank port in a normal position of a spring-biased valve plunger of the pressure control valve. A connection from the pump port to the adjusting pressure port is opened counter to the force of the spring by increasing a current of an electromagnet and increasing the pump pressure at the pump port. The spring, the electromagnet, and the resultant force of the pump pressure act along a common axis of movement of the valve plunger. A first nozzle connects the adjusting pressure port to an adjusting pressure chamber. A second nozzle connects the adjusting pressure port to the tank port.Type: ApplicationFiled: February 18, 2015Publication date: August 27, 2015Inventors: Johannes Offenburger, Carola Diebold, Friedemann Nordt
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Publication number: 20150226204Abstract: An electroproportionally controlled differential pressure valve cartridge includes actuation and tank ports on an outer circumference, and a pump port on a face-side. A spring preloads a piston into a position that relieves pressure from the actuation port to the tank port. A current increase through an electromagnet opposite the pump port and a pressure increase at the pump port counter the spring to open a connection from the pump port to the actuation port. A concentric opening extends from the pump port to a first piston surface. A duct extends from the first piston surface to a pump chamber. A further duct extends from the pump port to a spring chamber between the pump chamber and electromagnet. In the spring chamber, pressure over a second piston surface counters pressure over the first piston surface.Type: ApplicationFiled: February 11, 2015Publication date: August 13, 2015Inventors: Nadine Klausmann, Fabian Ruethschilling, Andreas Apperger, Carola Diebold
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Publication number: 20150152730Abstract: A hydraulic axial-piston machine achieves a control cut-off by an additional control edge of a control valve of an actuating mechanism for swiveling a swash plate.Type: ApplicationFiled: November 26, 2014Publication date: June 4, 2015Inventor: Carola Diebold
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Publication number: 20140147298Abstract: An adjusting device for an axial piston machine includes an actuating piston that delimits an actuating space configured to be connected to a control oil source or a control oil drain via a control valve. A control piston of the control valve is loaded firstly by a control spring and secondly by a spring arrangement that is also in active engagement with the actuating piston.Type: ApplicationFiled: November 21, 2013Publication date: May 29, 2014Applicant: Robert Bosch GmbHInventors: Carola Diebold, Andreas Apperger
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Publication number: 20140137955Abstract: A regulating valve, in particular an electroproportional pivot-angle regulator for a variable-displacement pump, includes a piston bore formed in a valve housing and a regulating piston guided in the piston bore. The regulating piston is configured to be actuated in an adjusting direction via an actuator, in particular via a lifting magnet. The regulating piston is acted upon in the opposite direction by a spring force of a counterspring. The counterspring is supported via a spring plate on a supporting spring which is supported on the valve housing. The spring plate is tensioned between the supporting spring and an adjusting device by which the spring plate is configured to be displaced in relation to the valve housing in or opposite to the adjusting direction.Type: ApplicationFiled: November 20, 2013Publication date: May 22, 2014Applicant: Robert Bosch GmbHInventors: Carola Diebold, Andreas Apperger
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ADJUSTMENT DEVICE FOR AN AXIAL PISTON MACHINE AND HYDRAULIC MACHINE HAVING SUCH AN ADJUSTMENT DEVICE
Publication number: 20140130661Abstract: An adjustment device for a pivoting cradle of a hydraulic machine, in particular of an axial piston machine, is disclosed. Said adjustment device has an actuating piston to which pressure medium for pivoting the pivoting cradle about a pivoting axis is applied via an actuating pressure space. In order to control the feeding in of pressure medium and the relieving of the actuating pressure space, a control valve is provided. Said control valve has a control piston configured to be adjusted by an electric actuator, wherein the electric actuator is controlled by a control device. In this context, the control device controls the electric actuator as a function of a control difference formed from a setpoint pivoting angle and an actual pivoting angle of the pivoting cradle. The actual pivoting angle of the pivoting cradle is fed back electrically to the control device here.Type: ApplicationFiled: November 8, 2013Publication date: May 15, 2014Applicant: Robert Bosch GmbHInventors: Joern Howind, Carola Diebold, Rolf Springmann -
Publication number: 20140109989Abstract: A hydraulic valve arrangement, in particular a control valve arrangement of an axial piston machine, includes at least two valves that have springs supported in each case on a spring seat. The two spring seats are connected to one another with a material-to-material fit in one or more of a non-positive manner and a positively locking manner.Type: ApplicationFiled: October 18, 2013Publication date: April 24, 2014Applicant: Robert Bosch GmbHInventors: Friedemann Nordt, Carola Diebold, Dieter Lohmiller
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Publication number: 20140103233Abstract: A hydraulic valve arrangement, in particular a control valve arrangement, of a hydraulic machine, in particular a hydraulic pump, includes at least one valve with a valve body penetrated by a pressure medium passage. The pressure medium passage has a minimum cross section that gives rise, in normal operation, to a control pressure downstream of the minimum cross section in accordance with a pressure acting at a pressure port of the valve. The minimum cross section is arranged close to a pressure medium passage mouth which is arranged upstream or is configured to be subjected to the high pressure. A hydraulic machine arrangement, in particular a pump arrangement, includes the hydraulic valve arrangement.Type: ApplicationFiled: October 17, 2013Publication date: April 17, 2014Applicant: Robert Bosch GmbHInventors: Martin Sewcz, Friedemann Nordt, Carola Diebold
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Publication number: 20130199631Abstract: A pressure/flow regulator includes a pressure control valve, a flow control valve, and a first control connection configured to set a variable displacement pump. The control connection is configured to be discharged to a tank by the flow control valve via a control edge of the pressure control valve that is open in the idle position of a valve piston of the pressure control valve.Type: ApplicationFiled: March 30, 2011Publication date: August 8, 2013Inventors: Christian Spielvogel, Friedemann Nordt, Carola Diebold