Patents by Inventor Christian Graspeuntner
Christian Graspeuntner 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: 10100796Abstract: A reciprocating pump comprising a roller tappet and a pump plunger that is operatively connected to the roller tappet, wherein the roller tappet has a roller support, a roller and a pin, wherein a first bearing eye and a second bearing eye are formed in the roller support, wherein the pin is mounted in the first bearing eye and in the second bearing eye, wherein the roller is arranged on the pin in a rotatable manner, and wherein the pin is mounted more flexibly in the first bearing eye than in the second bearing eye.Type: GrantFiled: July 14, 2015Date of Patent: October 16, 2018Assignee: Robert Bosch GmbHInventor: Christian Graspeuntner
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Publication number: 20170260947Abstract: The invention relates to a reciprocating pump (1) comprising a roller tappet (2) and a pump plunger (10) that is operatively connected to the roller tappet (2). The roller tappet (2) has a roller support (3), a roller (4) and a pin (5). A first bearing eye (6) and a second bearing eye (7) are formed in the roller support (3), the pin (5) being supported in the first bearing eye (6) and in the second bearing eye (7). The roller (4) is rotatably mounted on the pin (5). The pin (5) is mounted more resiliently in the first bearing eye (6) than in the second bearing eye (7).Type: ApplicationFiled: July 14, 2015Publication date: September 14, 2017Inventor: Christian Graspeuntner
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Patent number: 9677521Abstract: In a component (1), in particular a housing of a high-pressure fuel pump, in which at least one first high-pressure channel (4) and one second high-pressure channel (5) are present, the longitudinal axis of the first channel (4) is at an acute or right angle to the longitudinal axis of the second channel (5), wherein the second channel (5) leads into the first channel (4), such that an intersection is formed. The first channel (4) is formed by a central bore (10) and at least one secondary bore (11) that enlarges the cross-section of the central bore (10), wherein the longitudinal axis of the secondary bore (11) and the longitudinal axis of the central bore (10) extend parallel to one another.Type: GrantFiled: January 29, 2014Date of Patent: June 13, 2017Assignee: ROBERT BOSCH GMBHInventor: Christian Graspeuntner
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Patent number: 9447720Abstract: A device for injecting fuel into the combustion chamber of an internal combustion engine with at least one injector includes an injector body equipped with a high-pressure accumulator, a nozzle needle axially displaceably guided in the injector and surrounded by a nozzle chamber, a high-pressure line connecting the high-pressure accumulator to the nozzle chamber, and a resonator line arranged in parallel with the high-pressure line and communicating with the nozzle chamber and opening into the high-pressure accumulator via a resonator throttle. The resonator line and the high-pressure line, at least in their sections adjacent the high-pressure accumulator, are formed in a retaining body which, on its end face, is screwed into the accumulator pipe forming the high-pressure accumulator.Type: GrantFiled: November 2, 2011Date of Patent: September 20, 2016Assignee: ROBERT BOSCH GMBHInventors: Christian Graspeuntner, Gerhard Unterberger, Franz Guggenbichler
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Patent number: 9339858Abstract: A method for roller burnishing a cylindrical component part surface of a workpiece includes using a roller burnishing tool including at least one rolling element. The at least one rolling element is pressed by hydrostatic pressurization radially outwardly against the component part surface and is left to roll down on the component part surface by rotating the roller burnishing tool or the workpiece. The torque arising as a result of the friction between the at least one rolling element and the component part surface is detected and sent for evaluation.Type: GrantFiled: May 20, 2013Date of Patent: May 17, 2016Assignee: Robert Bosch GmbHInventors: Christian Graspeuntner, Christian Meisl
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Patent number: 9279403Abstract: A closure bolt for an injector of a modular common-rail fuel injection system includes at least one high-pressure port for high-pressure fuel and a bolt-like portion which is configured to be inserted into an opening of the injector and which has a first, preferably conical, sealing surface for closing the opening in a high-pressure-tight manner. The bolt-like portion has a high-pressure bore which is hydraulically connected to the high-pressure port and which issues into the injector. The closure bolt further includes a throughflow limiter configured to limit the flow rate of fuel delivered into the injector. The bolt-like portion has an insert in which the throughflow limiter is formed and which bears the first sealing surface.Type: GrantFiled: May 8, 2013Date of Patent: March 8, 2016Assignee: Robert Bosch GmbHInventors: Sven Pasedach, Christian Graspeuntner
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Publication number: 20150369191Abstract: In a component (1), in particular a housing of a high-pressure fuel pump, in which at least one first high-pressure channel (4) and one second high-pressure channel (5) are present, the longitudinal axis of the first channel (4) is at an acute or right angle to the longitudinal axis of the second channel (5), wherein the second channel (5) leads into the first channel (4), such that an intersection is formed. The first channel (4) is formed by a central bore (10) and at least one secondary bore (11) that enlarges the cross-section of the central bore (10), wherein the longitudinal axis of the secondary bore (11) and the longitudinal axis of the central bore (10) extend parallel to one another. The central bore (10) passes through ugh the component (1) and consists of a first segment (9) connected to the first segment, wherein the at least one secondary bore (11) extends only along the first segment (8) and no secondary bore is provided along the second segment (9).Type: ApplicationFiled: January 29, 2014Publication date: December 24, 2015Inventor: Christian Graspeuntner
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Patent number: 8839764Abstract: In a fuel supply system for heavy oil common-rail injection systems for internal combustion engines, including a tank (1), a primary feed pump (3) for delivering heavy oil from the tank (1) to a high-pressure pump (5), wherein the high-pressure pump (5), via at least one high-pressure line (12), is connected to a high-pressure accumulator (rail) (6) feeding at least one injector (8), and, furthermore, a purge valve (9), which is connected to the high-pressure accumulator via a separate high-pressure line (15) for directing at least a portion of the heavy oil back into the tank (1) via a return line, the purge valve (9) includes a valve member (28) which is movable between an opened and a closed position, a high-pressure connection for a high-pressure line (15) communicating with a heavy oil high-pressure accumulator (rail) (6), a low-pressure connection for a return line, and actuating means for actuating the valve member (28), wherein the valve seat (29) of the valve member (28) is designed as a sliding seatType: GrantFiled: October 8, 2009Date of Patent: September 23, 2014Assignee: Robert Bosch GmbHInventors: Christian Graspeuntner, Joachim Lackner, Johannes Schnedt
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Publication number: 20140060705Abstract: In a method for gas-nitriding high-pressure components of a high-pressure accumulator (rail) (1) for a common-rail injection system of an internal combustion engine, in which an internal thread of a feed or discharge opening (2) passing through the wall of the high-pressure accumulator (1) is covered during gassing, a cover screw (6) is screwed into the thread (5) to cover the thread (5).Type: ApplicationFiled: April 5, 2012Publication date: March 6, 2014Applicant: Robert Bosch GMBHInventor: Christian Graspeuntner
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Publication number: 20130312237Abstract: A method for roller burnishing a cylindrical component part surface of a workpiece includes using a roller burnishing tool including at least one rolling element. The at least one rolling element is pressed by hydrostatic pressurization radially outwardly against the component part surface and is left to roll down on the component part surface by rotating the roller burnishing tool or the workpiece. The torque arising as a result of the friction between the at least one rolling element and the component part surface is detected and sent for evaluation.Type: ApplicationFiled: May 20, 2013Publication date: November 28, 2013Inventors: Christian Graspeuntner, Christian Meisl
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Publication number: 20130298873Abstract: A closure bolt for an injector of a modular common-rail fuel injection system includes at least one high-pressure port for high-pressure fuel and a bolt-like portion which is configured to be inserted into an opening of the injector and which has a first, preferably conical, sealing surface for closing the opening in a high-pressure-tight manner. The bolt-like portion has a high-pressure bore which is hydraulically connected to the high-pressure port and which issues into the injector. The closure bolt further includes a throughflow limiter configured to limit the flow rate of fuel delivered into the injector. The bolt-like portion has an insert in which the throughflow limiter is formed and which bears the first sealing surface.Type: ApplicationFiled: May 8, 2013Publication date: November 14, 2013Inventors: Sven Pasedach, Christian Graspeuntner
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Publication number: 20130220271Abstract: A device for injecting fuel into the combustion chamber of an internal combustion engine with at least one injector includes an injector body equipped with a high-pressure accumulator, a nozzle needle axially displaceably guided in the injector and surrounded by a nozzle chamber, a high-pressure line connecting the high-pressure accumulator to the nozzle chamber, and a resonator line arranged in parallel with the high-pressure line and communicating with the nozzle chamber and opening into the high-pressure accumulator via a resonator throttle. The resonator line and the high-pressure line, at least in their sections adjacent the high-pressure accumulator, are formed in a retaining body which, on its end face, is screwed into the accumulator pipe forming the high-pressure accumulator.Type: ApplicationFiled: November 2, 2011Publication date: August 29, 2013Applicant: Robert Bosch GmbHInventors: Christian Graspeuntner, Gerhard Unterberger, Franz Guggenbichler
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Publication number: 20130180607Abstract: In a valve with pressure control function for common-rail heavy oil injection systems for internal combustion engines, including a valve support, a valve piston movably arranged in the valve support and interacting with a valve seat with the valve closed, and a compression spring applying a compressive force on the valve piston in the closing direction, a pin acting on the valve piston in the closing direction is arranged to be movable by the aid of an actuating means against the compressive force of the compression spring for controllably opening the valve so as to provide a flushing function.Type: ApplicationFiled: September 27, 2011Publication date: July 18, 2013Applicant: Robert Bosch GmbHInventor: Christian Graspeuntner
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Publication number: 20130092131Abstract: In an inlet connector (4) for connecting at least one high-pressure line of a common-rail injection system to an inlet bore (6) of a fuel injector, a pressure pipe (7) connectable to the inlet bore (6) and a housing (8) including a connection for the at least one high-pressure line are connected to each other so as to form a sliding seat.Type: ApplicationFiled: June 21, 2011Publication date: April 18, 2013Applicant: Robert Bosch GmbHInventor: Christian Graspeuntner
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Publication number: 20120234296Abstract: A pressure pipe fitting for feeding high-pressure fuel to, and discharging fuel from, an injector of a common-rail injection system of an internal combustion engine includes at least one inner pipe and an outer pipe coaxially arranged with the inner pipe, with an annular space formed between the outer and inner pipes, and an intermediate piece arranged in the annular space for coaxially positioning the inner pipe and the outer pipe. The inner pipe preferably has conical seat surface on its end face. A threaded connection is provided to position the intermediate piece at a defined axial distance from the seat surface on the inner pipe. The inner pipe comprises a stop acting in the axial direction and cooperating with a counter-stop of the intermediate piece.Type: ApplicationFiled: November 22, 2010Publication date: September 20, 2012Applicant: ROBERT BOSCH GMBHInventors: Christian Graspeuntner, Gerhard Unterberger
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Publication number: 20110192376Abstract: In a fuel supply system for heavy oil common-rail injection systems for internal combustion engines, including a tank (1), a primary feed pump (3) for delivering heavy oil from the tank (1) to a high-pressure pump (5), wherein the high-pressure pump (5), via at least one high-pressure line (12), is connected to a high-pressure accumulator (rail) (6) feeding at least one injector (8), and, furthermore, a purge valve (9), which is connected to the high-pressure accumulator via a separate high-pressure line (15) for directing at least a portion of the heavy oil back into the tank (1) via a return line, the purge valve (9) includes a valve member (28) which is movable between an opened and a closed position, a high-pressure connection for a high-pressure line (15) communicating with a heavy oil high-pressure accumulator (rail) (6), a low-pressure connection for a return line, and actuating means for actuating the valve member (28), wherein the valve seat (29) of the valve member (28) is designed as a sliding seatType: ApplicationFiled: October 8, 2009Publication date: August 11, 2011Applicant: Robert Bosch GmbhInventors: Christian Graspeuntner, Joachim Lackner, Johannes Schnedt
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Patent number: 7866300Abstract: In a device for the injection of fuel into the combustion chamber of an internal combustion engine, including at least one high-pressure accumulator (1), an injector (4), at least one high-pressure line (7) connecting the high-pressure accumulator (1) with the injector (4), and a resonator line (16) arranged in parallel with the high-pressure line (7) between the injector (4) and the high-pressure accumulator (1) and including a resonator throttle (17) on the side of the high-pressure accumulator, the resonator line (16) is formed by an insert piece (18) pressed into the bore of the high-pressure line and is, in particular, formed within the same.Type: GrantFiled: June 13, 2007Date of Patent: January 11, 2011Assignees: Robert Bosch GmbH, AVL List GmbHInventors: Heribert Kammerstetter, Jaroslav Hlousek, Christian Graspeuntner, Markus Kathan, Christian Meisl
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Publication number: 20100263626Abstract: In a device for the injection of fuel into the combustion chamber of an internal combustion engine, including at least one high-pressure accumulator (1), an injector (4), at least one high-pressure line (7) connecting the high-pressure accumulator (1) with the injector (4), and a resonator line (16) arranged in parallel with the high-pressure line (7) between the injector (4) and the high-pressure accumulator (1) and including a resonator throttle (17) on the side of the high-pressure accumulator, the resonator line (16) is formed by an insert piece (18) pressed into the bore of the high-pressure line and is, in particular, formed within the same.Type: ApplicationFiled: June 13, 2007Publication date: October 21, 2010Applicants: ROBERT BOSCH GMBH, AVL LIST GMBHInventors: Heribert Kammerstetter, Jaroslav Hlousek, Christian Graspeuntner, Markus Kathan, Christian Meisl