Patents by Inventor Lorenz Drutu
Lorenz Drutu 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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Publication number: 20220252030Abstract: A high-pressure fuel pump includes a pressure-limiting valve that opens from a high-pressure region of the high-pressure fuel pump towards a compression chamber or towards a low-pressure region of the high-pressure fuel pump. The pressure-limiting valve includes a valve body with a valve seat surface that tapers against the opening direction of the pressure-limiting valve, a spherical valve element, and a valve spring, which presses the spherical valve element against the opening direction of the pressure-limiting valve towards the valve seat surface. When the pressure-limiting valve is closed, the valve element and the valve seat surface bear against one another over a contact line, and a gap is formed between the valve element and valve body, next to the contact line. This gap is asymmetrically narrower upstream of the contact line than downstream of the contact line.Type: ApplicationFiled: July 6, 2020Publication date: August 11, 2022Inventors: Christoph Buehler, Wolfgang Bueser, Markus Goeke, Thomas Fritzsche, Rainer Kornhaas, Lorenz Drutu, Lars Gonnermann
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Patent number: 6832901Abstract: The unit includes an electric drive motor (12) and a pump section (24) that are situated next to each other in a common housing (10) designed at least nearly in the shape of a hollow cylinder. The pump section (24) comprises a delivery element (26) rotating in a pump chamber (30), and one wall (32, 34) each forms a boundary of the pump chamber (30) with the drive motor (12) and with the outside of the housing (10) in the direction of the axis of rotation (28) of the delivery element (26). The walls (34) forming the boundary of the pump chamber (30) with the outside of the housing (10) is formed as a single component with the housing (10), and the walls (32) forming the boundary of the pump chamber (30) with the drive motor (12) is inserted into the housing (10) as a separate component.Type: GrantFiled: July 22, 2002Date of Patent: December 21, 2004Assignee: Robert Bosch GmbHInventors: Michael Kuehn, Udo Willmes, Hans-Joerg Fees, Lorenz Drutu
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Patent number: 6729347Abstract: The invention relates to a device (10) for pressure regulation, having a housing (11) and a closing body (12) received axially movably therein, wherein the housing (11) has at least one pressure medium inlet (21) and one pressure medium outlet (22), and the closing body (12) is prestressed by a helical spring (14) against a valve seat (11′) in the housing, and at least one compensation means for the helical spring (14) is provided. The invention provides that as the compensation means, a compensation element (15) disposed between the closing body (12) and an end, oriented toward the closing body (12), of the helical spring (14) is provided, which is braced resiliently in the radial direction on the inner wall of the housing (11) and, with its central region (15′), is in preferably frictional-engagement contact with the closing body (12).Type: GrantFiled: May 13, 2002Date of Patent: May 4, 2004Assignee: Robert Bosch GmbHInventors: Ralph Ittlinger, Wolfgang Bueser, Lorenz Drutu
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Publication number: 20030021708Abstract: The unit comprises an electric drive motor (12) and a pump section (24) that are situated next to each other in a common housing (10) designed at least nearly in the shape of a hollow cylinder. The pump section (24) comprises a delivery element (26) rotating in a pump chamber (30), and one wall (32, 34) each forms a boundary of the pump chamber (30) with the drive motor (12) and with the outside of the housing (10) in the direction of the axis of rotation (28) of the delivery element (26). The wall (34) forming the boundary of the pump chamber (30) with the outside of the housing (10) is formed as a single component with the housing (10), and the wall (32) forming the boundary of the pump chamber (30) with the drive motor (12) is inserted into the housing (10) as a separate component.Type: ApplicationFiled: July 22, 2002Publication date: January 30, 2003Inventors: Michael Kuehn, Udo Willmes, Hans-Joerg Fees, Lorenz Drutu
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Publication number: 20020148508Abstract: The invention relates to a device (10) for pressure regulation, having a housing (11) and a closing body (12) received axially movably therein, wherein the housing (11) has at least one pressure medium inlet (21) and one pressure medium outlet (22), and the closing body (12) is prestressed by a helical spring (14) against a valve seat (11′) in the housing, and at least one compensation means for the helical spring (14) is provided. The invention provides that as the compensation means, a compensation element (15) disposed between the closing body (12) and an end, oriented toward the closing body (12), of the helical spring (14) is provided, which is braced resiliently in the radial direction on the inner wall of the housing (11) and, with its central region (15′), is in preferably frictional-engagement contact with the closing body (12).Type: ApplicationFiled: May 13, 2002Publication date: October 17, 2002Inventors: Ralph Ittlinger, Wolfgang Bueser, Lorenz Drutu
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Patent number: 6439263Abstract: The pressure regulating valve (2) proposed here can be designed with the aid of the outflow throttle restriction (28) downstream of the valve seat (22) in such a way that the pressure regulating valve (2), as the fluid flow becomes greater, sets or adjusts a smaller pressure difference at the pressure regulating valve (2), as a result of which the line losses that can never be avoided can be compensated for. The pressure regulating valve is suitable in particular for a fuel supply system of a motor vehicle having an internal combustion engine.Type: GrantFiled: December 22, 2000Date of Patent: August 27, 2002Assignee: Robert Bosch GmbHInventors: Helmut Schwegler, Ralph Ittlinger, Wolfgang Bueser, Martin Maier, Lorenz Drutu
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Publication number: 20010022192Abstract: In the pressure regulating valve (2) proposed here, a hydraulic damping device (40) with a damper chamber (32) through which a fluid flow passes assures effective damping of the oscillations of the closing body (20). The pressure regulating valve is suited in particular for a fuel supply system of a motor vehicle having an internal combustion engine.Type: ApplicationFiled: December 21, 2000Publication date: September 20, 2001Applicant: Robert Bosch GmbHInventors: Helmut Schwegler, Ralph Ittlinger, Wolfgang Bueser, Martin Maier, Lorenz Drutu
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Publication number: 20010022193Abstract: The pressure regulating valve (2) proposed here can be designed with the aid of the outflow throttle restriction (28) downstream of the valve seat (22) in such a way that the pressure regulating valve (2), as the fluid flow becomes greater, sets or adjusts a smaller pressure difference at the pressure regulating valve (2), as a result of which the line losses that can never be avoided can be compensated for. The pressure regulating valve is suitable in particular for a fuel supply system of a motor vehicle having an internal combustion engine.Type: ApplicationFiled: December 22, 2000Publication date: September 20, 2001Applicant: Robert Bosch GmbHInventors: Helmut Schwegler, Ralph Ittlinger, Wolfgang Bueser, Martin Maier, Lorenz Drutu
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Patent number: 6213143Abstract: A liquid filter (1) with a built-in pressure regulator (11) for fuel is proposed, in which the pressure regulator (11) with its diaphragm (32) is mounted on the inside of a cap (14) that has the inflow connector (16) and the tank connector (17). The diaphragm (32), which experiences a flow on its inside, is acted upon by the pressure of the fuel on the clean side (25) of the filter element (21), and the flow through the filter element is radially from the outside inward. Integrating the pressure regulator (11) in the cap enables a simple, compact, economical design of the liquid filter (10), through whose valve (36) in the pressure regulator (11) only cleaned fuel flows.Type: GrantFiled: October 28, 1996Date of Patent: April 10, 2001Assignee: Robert Bosch GmbHInventors: Helmut Schwegler, Uwe Liskow, Lorenz Drutu, Ulrich Projahn, Bernhard Lucas, Wolfgang Bueser
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Patent number: 6029694Abstract: This pressure regulator prevents unpleasant vibration of the closing body. In the pressure regulator, a friction spring that is simple to mount is provided, by means of which the vibration of the closing body can be suppressed or reduced. The pressure regulator is intended in particular for fuel supply systems of motor vehicles that have an internal combustion engine.Type: GrantFiled: December 1, 1997Date of Patent: February 29, 2000Assignee: Robert Bosch GmbHInventors: Helmut Schwegler, Roland Hoepfl, Wolfgang Bueser, Uwe Talmon, Lorenz Drutu
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Patent number: 5901742Abstract: A pressure control valve in which the mass to be moved by the diaphragm is reduced by providing that a valve seat body having a valve seat face is placed in a middle region of the diaphragm. When the valve seat face lifts away from the valve closing body, fuel to be diverted flows from the pressure control side of the diaphragm to the return side of the diaphragm, via the valve seat face and a return conduit The pressure control valve is especially suitable for use in fuel supply systems of internal combustion engines.Type: GrantFiled: June 19, 1996Date of Patent: May 11, 1999Assignee: Robert Bosch GmbHInventors: Stephan Kleppner, Helmut Schwegler, Kurt Frank, Wolfgang Bueser, Uwe Liskow, Lorenz Drutu
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Patent number: 5407329Abstract: The pressure regulator is suitable for disposition in a fuel pump. The pressure regulator has a metal bellows, which is connected on one end to a retaining ring and on the other end to a disk. An element is screwed into the retaining ring, which element carries a valve closing member of a seat valve, whose valve seat encompasses an outlet bore of the disk. The interior of the bellows communicates with the compression side of the fuel pump by means of an opening of the element, and with the intake side by means of the outlet bore of the disk.Type: GrantFiled: June 1, 1994Date of Patent: April 18, 1995Assignee: Robert Bosch GmbHInventors: Wolfgang Bueser, Lorenz Drutu