Patents by Inventor Eberhard Bohnaker
Eberhard Bohnaker 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: 8539681Abstract: A manually guided implement having an engine housing and a handle housing that are interconnected by anti-vibration elements. The handle housing is provided with a longitudinal support having, relative to a conventional operating position of the implement, a front end face that is disposed transverse to a longitudinal axis of the longitudinal support. A securement end of a front tubular handle rests against and is secured to the front end face of the longitudinal support.Type: GrantFiled: August 1, 2006Date of Patent: September 24, 2013Assignee: Andreas Stihl AG & Co., KGInventors: Gunter Stein, Eberhard Bohnaker, Wolfgang Weissert, Johannes Menzel
-
Patent number: 8261701Abstract: An internal combustion engine has a cylinder (2) and a crankcase (4). A combustion chamber (3) is formed in the cylinder (2) and is delimited by a piston (5). The piston (5) rotationally drives a crankshaft (7) in a rotational direction (21) via a connecting rod (6). The crankshaft (7) is arranged in a crankcase interior space (17). A mixture inlet (9) is provided in the crankcase interior space (17). In the crankcase interior space (17), at least one flow conducting element (23, 33, 43, 53, 63, 73) is provided which is spatially fixed and this flow conducting element projects into the crankcase interior space (17) and lies opposite to the rotational direction (21) of the crankshaft (7).Type: GrantFiled: October 7, 2008Date of Patent: September 11, 2012Assignee: Andreas Stihl AG & Co. KGInventors: Jörg Amann, Eberhard Bohnaker, Ricardo Hojczyk, Ulrich Kapinsky, Mark Reichler, Martin Rieber
-
Patent number: 8215278Abstract: An internal combustion engine having a cylinder, a fuel-supply mechanism, and an elastic connector for connecting the fuel supply mechanism to the cylinder. The connector has a first channel for fuel/air mixture and a second channel for combustion air. The connector has a first connection end and a second connection end at which the two channels open out. The two channels are separated from one another by a partition that extends in the longitudinal direction of the channels. The partition is twisted about its longitudinal central axis between the first and second connection ends to achieve a great elasticity of the connector. To produce the elastic connector, a respective core is used for each channel, and the cores are moved relative to one another to enable removal of the connector from a mold.Type: GrantFiled: January 27, 2009Date of Patent: July 10, 2012Assignee: Andreas Stihl AG & Co. KGInventors: Stefan Kummermehr, Stefan Richter, Thomas Techow, Viktoria Schmidt, Christoph von Hiller, Ralf Steidinger, Eberhard Bohnaker, Manfred Rabis
-
Publication number: 20110182660Abstract: A shaft/hub connection between a shaft rotatably driven about an axis of rotation, and a hub disposed on the shaft so as to be non-rotatable relative thereto. The hub has a conical opening and an end face at that end of the hub having the greatest inner diameter. The hub also has at least one relief groove that extends into the hub from the end face thereof. A conical shaft extension on the shaft extends into the conical opening of the hub and is held in the hub via a conical pressure connection.Type: ApplicationFiled: April 7, 2011Publication date: July 28, 2011Inventors: Ralf-Rainer Kemmler, Eberhard Bohnaker
-
Patent number: 7971681Abstract: An exhaust-gas muffler (1) has a housing (2) through which at least one sleeve (11) projects. At one end, the sleeve (11) has an attachment opening (10) and at the opposite-lying end has an access opening (14). To avoid a contamination of the sleeve (11) during operation, a plug (15, 25, 35, 40, 45, 55) of a pressed metal wire is arranged in the access opening (14).Type: GrantFiled: May 27, 2009Date of Patent: July 5, 2011Assignee: Andreas Stihl AG & Co. KGInventors: Eberhard Bohnaker, Rebekka Helfen, Johannes Menzel, Helmut Zimmermann
-
Patent number: 7717974Abstract: An air filter arrangement for an internal combustion engine, especially for a two-cycle engine in a manually guided implement such as a power saw, a cut-off machine, etc., and including an air filter element that delimits a first clean chamber. The air filter arrangement has an inlet opening for an air channel and an inlet opening for a mixture channel. A shield is provided for shielding the air filter element relative to the mixture channel. The inlet opening of the air channel and the inlet opening of the mixture channel are interconnected via the shield.Type: GrantFiled: March 22, 2007Date of Patent: May 18, 2010Assignee: Andreas Stihl AG & Co. KGInventors: Daniel Diepolder, Eberhard Bohnaker, Arne Jensen
-
Publication number: 20090294210Abstract: An exhaust-gas muffler (1) has a housing (2) through which at least one sleeve (11) projects. At one end, the sleeve (11) has an attachment opening (10) and at the opposite-lying end has an access opening (14). To avoid a contamination of the sleeve (11) during operation, a plug (15, 25, 35, 40, 45, 55) of a pressed metal wire is arranged in the access opening (14).Type: ApplicationFiled: May 27, 2009Publication date: December 3, 2009Inventors: Eberhard Bohnaker, Rebekka Helfen, Johannes Menzel, Helmut Zimmermann
-
Publication number: 20090188461Abstract: An internal combustion engine having a cylinder, a fuel-supply mechanism, and an elastic connector for connecting the fuel supply mechanism to the cylinder. The connector has a first channel for fuel/air mixture and a second channel for combustion air. The connector has a first connection end and a second connection end at which the two channels open out. The two channels are separated from one another by a partition that extends in the longitudinal direction of the channels. The partition is twisted about its longitudinal central axis between the first and second connection ends to achieve a great elasticity of the connector. To produce the elastic connector, a respective core is used for each channel, and the cores are moved relative to one another to enable removal of the connector from a mold.Type: ApplicationFiled: January 27, 2009Publication date: July 30, 2009Inventors: Stefan Kummermehr, Stefan Richter, Thomas Techow, Viktoria Schmidt, Christoph von Hiller, Ralf Steidinger, Eberhard Bohnaker, Manfred Rabis
-
Publication number: 20090114172Abstract: An internal combustion engine has a cylinder (2) and a crankcase (4). A combustion chamber (3) is formed in the cylinder (2) and is delimited by a piston (5). The piston (5) rotationally drives a crankshaft (7) in a rotational direction (21) via a connecting rod (6). The crankshaft (7) is arranged in a crankcase interior space (17). A mixture inlet (9) is provided in the crankcase interior space (17). In the crankcase interior space (17), at least one flow conducting element (23, 33, 43, 53, 63, 73) is provided which is spatially fixed and this flow conducting element projects into the crankcase interior space (17) and lies opposite to the rotational direction (21) of the crankshaft (7).Type: ApplicationFiled: October 7, 2008Publication date: May 7, 2009Inventors: Jorg Amann, Eberhard Bohnaker, Ricardo Hojczyk, Ulrich Kapinsky, Mark Reichler, Martin Rieber
-
Publication number: 20090028630Abstract: A shaft/hub connection between a shaft rotatably driven about an axis of rotation, and a hub disposed on the shaft so as to be non-rotatable relative thereto. A conical shaft extension on the shaft extends into a conical opening of the hub and is held in the hub via a conical pressure connection. The hub is provided with a stress-relieving or antifatigue arrangement for reducing the dynamic fatigue stresses that occur on the hub during operation. The shaft/hub connection is advantageously utilized for connecting the crankshaft of the internal combustion engine of a manually guided implement with a flywheel.Type: ApplicationFiled: July 22, 2008Publication date: January 29, 2009Inventors: Ralf-Rainer Kemmler, Eberhard Bohnaker
-
Publication number: 20080035098Abstract: A portable handheld work apparatus has an internal combustion engine (5) having a cylinder (8) and a crankcase (13). The cylinder (8) has an opening (19) for exhaust gases whereat an exhaust-gas muffler (14) is mounted. The exhaust-gas muffler (14) is mounted on the cylinder (8) at least at one attachment location (40, 41) and at least a further attachment location (42) on the internal combustion engine (5). A reduced weight of the work apparatus and a low mechanical load of the exhaust-gas muffler (14) can be achieved when the exhaust-gas muffler is fixed at at least one of the attachment locations (42) via a connection which permits a limited relative movement between the exhaust-gas muffler (14) and the internal combustion engine (5) in at least one direction.Type: ApplicationFiled: August 1, 2007Publication date: February 14, 2008Inventors: Johannes Menzel, Marc Schmid, Wolfgang Weissert, Eberhard Bohnaker
-
Publication number: 20070220848Abstract: An air filter arrangement for an internal combustion engine, especially for a two-cycle engine in a manually guided implement such as a power saw, a cut-off machine, etc., and including an air filter element that delimits a first clean chamber. The air filter arrangement has an inlet opening for an air channel and an inlet opening for a mixture channel. A shield is provided for shielding the air filter element relative to the mixture channel. The inlet opening of the air channel and the inlet opening of the mixture channel are interconnected via the shield.Type: ApplicationFiled: March 22, 2007Publication date: September 27, 2007Inventors: Daniel Diepolder, Eberhard Bohnaker, Arne Jensen
-
Publication number: 20070028464Abstract: A manually guided implement having an engine housing and a handle housing that are interconnected by anti-vibration elements. The handle housing is provided with a longitudinal support having, relative to a conventional operating position of the implement, a front end face that is disposed transverse to a longitudinal axis of the longitudinal support. A securement end of a front tubular handle rests against and is secured to the front end face of the longitudinal support.Type: ApplicationFiled: August 1, 2006Publication date: February 8, 2007Applicant: Andreas Stihl AG & Co. KGInventors: Gunter Stein, Eberhard Bohnaker, Wolfgang Weissert, Johannes Menzel
-
Patent number: 6152089Abstract: The invention relates to a portable handheld work apparatus such as a motor-driven chain saw having an internal combustion engine mounted in a housing for driving a work tool. A cooling-air blower is mounted on one side of the housing. The cooling-air blower is covered by a blower cover having air-intake openings. The blower cover has a bearing lug facing toward the cooling-air blower. A pull-rope starter for starting the engine is held on the bearing lugs and the housing of the pull-rope starter is attached to the blower cover. The pull-rope starter housing is configured as a component separate from the blower cover in order to minimize the disturbance of the cooling-air inflow by the pull-rope starter housing. This component is attached at a spacing to the air-intake openings of the blower.Type: GrantFiled: November 24, 1998Date of Patent: November 28, 2000Assignee: Andreas Stihl AG & Co.Inventors: Philipp Neumann, Bernhard Durr, Helmut Lux, Eberhard Bohnaker