Patents by Inventor Bruno Hezel
Bruno Hezel 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: 8627718Abstract: The invention relates to a sensor arrangement for determining a tank fill level of a liquid, especially a reducing agent for removing nitrogen from the exhaust gases of an internal combustion engine, which liquid is contained in a tank, at least two electrically conductive measuring electrodes being at least partially embedded in a carrier that is produced of an electrically non-conductive material. The sensor arrangement includes a temperature sensor, especially a resistor with negative temperature coefficient being used as a temperature sensor, which is integrated into the carrier.Type: GrantFiled: October 31, 2008Date of Patent: January 14, 2014Assignee: Robert Bosch GmbHInventors: Markus Ulrich, Vlatko Babic, Guenther Krenz, Rainer Haeberer, Wolf-Ingo Ratzel, Bruno Hezel, Michael Gerlach, Vaclav Straus
-
Patent number: 8191855Abstract: A bypass valve for internal combustion engines for connecting the pressure side to the intake side of a supercharging device. The bypass valve includes an electromagnetic actuator and a valve housing in which a closing component is movably accommodated. The closing component has a valve body, acted upon by pressure and movable in a flow channel, and a switchable sealing element.Type: GrantFiled: April 21, 2006Date of Patent: June 5, 2012Assignee: Robert Bosch GmbHInventors: Bruno Hezel, Harald Laue
-
Publication number: 20110011178Abstract: The invention relates to a sensor arrangement for determining a tank fill level of a liquid, especially a reducing agent for removing nitrogen from the exhaust gases of an internal combustion engine, which liquid is contained in a tank, at least two electrically conductive measuring electrodes being at least partially embedded in a carrier that is produced of an electrically non-conductive material. The sensor arrangement includes a temperature sensor, especially a resistor with negative temperature coefficient being used as a temperature sensor, which is integrated into the carrier.Type: ApplicationFiled: October 31, 2008Publication date: January 20, 2011Inventors: Markus Ulrich, Vlatko Babic, Guenther Krenz, Rainer Haeberer, Wolf-Ingo Ratzel, Bruno Hezel, Michael Gerlach, Vaclav Straus
-
Publication number: 20090301080Abstract: A bypass valve for internal combustion engines for connecting the pressure side to the intake side of a supercharging device. The bypass valve includes an electromagnetic actuator and a valve housing in which a closing component is movably accommodated. The closing component has a valve body, acted upon by pressure and movable in a flow channel, and a switchable sealing element.Type: ApplicationFiled: April 21, 2006Publication date: December 10, 2009Inventors: Bruno Hezel, Harald Laue
-
Patent number: 7174882Abstract: Known pressure regulating valves have a valve closing body, which cooperates with a valve seat, and a restoring spring, which acts on a valve closing body in the direction facing away from the valve seat. It is disadvantageous that the restoring spring is disposed in a pressure chamber, which has the valve seat and through which aggressive blowby gases flow out of the crankcase. The blowby gases for instance have a corrosive, etching effect on the material of the restoring spring, shortening the service life and lessening the spring force of the restoring spring. This has a highly adverse effect on the regulation of the pressure in the crankcase. In the pressure regulating valve of the invention, the service life of the restoring spring is increased. According to the invention, the restoring spring (31) is embodied as a tension spring and is located on the side of the valve closing body (15) facing away from the valve seat (12).Type: GrantFiled: April 12, 2005Date of Patent: February 13, 2007Assignee: Robert Bosch GmbHInventors: Bruno Hezel, Markus Christen, Markus Ulrich
-
Publication number: 20050247354Abstract: Known pressure regulating valves have a valve closing body, which cooperates with a valve seat, and a restoring spring, which acts on a valve closing body in the direction facing away from the valve seat. It is disadvantageous that the restoring spring is disposed in a pressure chamber, which has the valve seat and through which aggressive blowby gases flow out of the crankcase. The blowby gases for instance have a corrosive, etching effect on the material of the restoring spring, shortening the service life and lessening the spring force of the restoring spring. This has a highly adverse effect on the regulation of the pressure in the crankcase. In the pressure regulating valve of the invention, the service life of the restoring spring is increased. According to the invention, the restoring spring (31) is embodied as a tension spring and is located on the side of the valve closing body (15) facing away from the valve seat (12).Type: ApplicationFiled: April 12, 2005Publication date: November 10, 2005Inventors: Bruno Hezel, Markus Christen, Markus Ulrich
-
Patent number: 6901942Abstract: The invention relates to a method for producing a throttle valve unit for installation into a flow conduit through which a gas flow passes. A flap shaft of the throttle valve unit is affixed to a stamped insert part inside a fastening region. The stamped insert part, which includes an insert border, is molded into a housing. At the same time as the stamped insert part is molded into the housing, the flap shaft affixed to the stamped insert part is molded-in inside the fastening region. A planar region of the stamped insert part connected to the flap shaft is cut out from this stamped insert part.Type: GrantFiled: June 11, 2003Date of Patent: June 7, 2005Assignee: Robert Bosch GmbHInventors: Erwin Krimmer, Peter Baur, Christian Lorenz, Bruno Hezel, Hubert Hickl
-
Patent number: 6860915Abstract: The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to create an oil separator for use in various engines having different quantities of crankcase gas, said oil separator is designed so that, as an option, helixes (48) having different radial depths of the flow path can be inserted in a housing section for the cyclone separator (30).Type: GrantFiled: March 16, 2002Date of Patent: March 1, 2005Assignee: Robert Bosch GmbHInventors: Juergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
-
Patent number: 6811586Abstract: The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to reduce the mutual interference of flowing crankcase gas and separated fluid, an oil drain opening (44) is provided upstream from the cyclone separator (30) in the flow or cascade direction, through which oil separated in the preliminary separator can be returned.Type: GrantFiled: February 3, 2003Date of Patent: November 2, 2004Assignee: Robert Bosch GmbHInventors: Juergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
-
Patent number: 6725849Abstract: The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to simplify the design of the oil separator and obtain easier installability, it is provided that the preliminary separator (28), the cyclone separator (30), the fine separator (32) and the valve device (36) provided, if necessary, are located on the outside (20) of the cylinder-head hood (4) and are covered by a housing half-shell (6) which, together with the outside (20) of the cylinder-head hood (4), forms a housing for the oil separator (2).Type: GrantFiled: February 3, 2003Date of Patent: April 27, 2004Assignee: Robert Bosch GmbHInventors: Juergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
-
Publication number: 20040031945Abstract: The invention relates to a method for producing a throttle valve unit for installation into a flow conduit through which a gas flow passes. A flap shaft of the throttle valve unit is affixed to a stamped insert part inside a fastening region. The stamped insert part, which includes an insert border, is molded into a housing. At the same time as the stamped insert part is molded into the housing, the flap shaft affixed to the stamped insert part is molded-in inside the fastening region. A planar region of the stamped insert part connected to the flap shaft is cut out from this stamped insert part.Type: ApplicationFiled: June 11, 2003Publication date: February 19, 2004Applicant: Robert Bosch GmbHInventors: Erwin Krimmer, Peter Baur, Christian Lorenz, Bruno Hezel, Hubert Hickl
-
Publication number: 20040003579Abstract: The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to create an oil separator for use in various engines having different quantities of crankcase gas, said oil separator is designed so that, as an option, helixes (48) having different radial depths of the flow path can be inserted in a housing section for the cyclone separator (30).Type: ApplicationFiled: February 3, 2003Publication date: January 8, 2004Inventors: Juergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
-
Publication number: 20030150436Abstract: The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to simplify the design of the oil separator and obtain easier installability, it is provided that the preliminary separator (28), the cyclone separator (30), the fine separator (32) and the valve device (36) provided, if necessary, are located on the outside (20) of the cylinder-head hood (4) and are covered by a housing half-shell (6) which, together with the outside (20) of the cylinder-head hood (4), forms a housing for the oil separator (2).Type: ApplicationFiled: February 3, 2003Publication date: August 14, 2003Inventors: Juergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
-
Publication number: 20030110743Abstract: The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to reduce the mutual interference of flowing crankcase gas and separated fluid, an oil drain opening (44) is provided upstream from the cyclone separator (30) in the flow or cascade direction, through which oil separated in the preliminary separator can be returned.Type: ApplicationFiled: February 3, 2003Publication date: June 19, 2003Inventors: Juergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
-
Patent number: 5975064Abstract: An exhaust gas recirculation valve having a valve member that cooperates with a valve seat of a connection neck of an exhaust gas recirculation line. The neck protrudes into a tube of the intake system of an internal combustion engine, and the valve seat points toward the inlet side of the exhaust gas recirculation line. A valve member of the exhaust gas recirculation valve is thus acted upon by the exhaust gas pressure in the closing direction, as a supplement to a compression spring counter to an armature of an electromagnet acting in the opening direction. To compensate for the forces acting in the closing direction, the exhaust gas is carried via a conduit in the valve shaft into a control chamber, which is closed off from the pressure in the tube via a movable wall, having an effective surface area that substantially corresponds to the effective surface area of the valve member.Type: GrantFiled: August 14, 1998Date of Patent: November 2, 1999Assignee: Robert Bosch GmbHInventors: Erwin Krimmer, Bruno Hezel, Eberhard Wizgall, Tilman Miehle, Peter Jauernig
-
Patent number: 5666922Abstract: A fuel line connector for producing recirculation of leakage fuel in a fuel injection valve in which communication of a fuel line with a connection bore of a housing, and with the holder of a fuel injection valve is produced. This is achieved by providing that the fuel line connector has elastically deformable retaining arms, which, after a connecting stub of the fuel line connector has been plugged into a connection bore, engage the housing that contains the connection bore from behind.Type: GrantFiled: May 30, 1995Date of Patent: September 16, 1997Assignee: Robert Bosch GmbHInventors: Erwin Krimmer, Peter Jauernig, Bruno Hezel, Andreas-Bernd Rosenbusch
-
Patent number: 4807328Abstract: A roller intended in particular for office furniture comprises a supporting body (1) made from a plastic material, an axle (2) mounted in the supporting body, at least one wheel (2) seated on the axle, a metallic pin (5) seated rotatably in the metallic body and arranged in offset position relative to the axle (2), in a plane extending perpendicularly to the axle, and a wiper contact conductively connected with the pin (5) and provided with a resilient portion projecting beyond the plane (20) extending perpendicularly to the pin (5) and being tangent to the at least one wheel (3). The resilient portion of the wiper contact is formed by a helical spring (12) standing substantially perpendicular to the tangential plane (20) and carrying on its free end a contact body (15) projecting beyond the tangential plane (20).Type: GrantFiled: March 11, 1987Date of Patent: February 28, 1989Assignee: Gross & Froelich GmbH & Co.Inventor: Bruno Hezel