Patents by Inventor Tim Gegg
Tim Gegg 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: 9797319Abstract: A handheld work apparatus has a combustion engine (4) for driving a tool. The combustion engine (4) has an ignition device, a device for metering fuel and a control device (31). The control device (31) engages when an engagement speed (nE1, nE2) is reached, in order to limit the speed (n) of the combustion engine (4). In order to allow the speed (n) to be set in an easy manner at full throttle, the work apparatus has a device for setting the engagement speed (nE2) by the user.Type: GrantFiled: February 4, 2013Date of Patent: October 24, 2017Assignee: Andreas Stihl AG & Co. KGInventors: Manuel Dangelmaier, Tim Gegg
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Patent number: 9644558Abstract: A work apparatus has an internal combustion engine and a starter device for starting the engine. Within a housing of the work apparatus, a first electrical component is arranged at a first location and a second electrical component is arranged at a second location. A control unit is provided which is connected to the first electrical component and to the second electrical component. The control unit detects a first temperature-dependent value of the first electrical component at the first location, and a second temperature-dependent value of the second electrical component at the second location, and identifies the starting conditions as a function of these values. The first electrical component is a first actuator and the second electrical component is a second actuator or a sensor.Type: GrantFiled: January 15, 2015Date of Patent: May 9, 2017Assignee: Andreas Stihl AG & Co. KGInventors: Manuel Dangelmaier, Tim Gegg, Clemens Klatt
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Patent number: 9322329Abstract: A method controls the rpm of a combustion engine in a hand-held work apparatus such as a brushcutter. The engine drives a work tool via a clutch which engages as a function of the engine rpm (n). A spark plug is arranged in the combustion chamber and is driven by an ignition unit. During start of the engine, an rpm lock circuit is active and defines a control variable as a function of the instantaneous rpm (nact) of the engine. According to the magnitude of this control variable, operating parameters of the engine are adapted to change the instantaneous rpm (nact). A control variable is determined for the adaptation of the operating parameters by the rpm lock circuit. The switch-off of the rpm lock circuit is provided when the control variable of the control lies outside a predetermined bandwidth of the absolute magnitude of the control variables.Type: GrantFiled: July 31, 2013Date of Patent: April 26, 2016Assignee: Andreas Stihl AG & Co. KGInventors: Tim Gegg, Armin Koelmel, Manuel Dangelmaier
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Publication number: 20150198129Abstract: A work apparatus has an internal combustion engine and a starter device for starting the engine. Within a housing of the work apparatus, a first electrical component is arranged at a first location and a second electrical component is arranged at a second location. A control unit is provided which is connected to the first electrical component and to the second electrical component. The control unit detects a first temperature-dependent value of the first electrical component at the first location, and a second temperature-dependent value of the second electrical component at the second location, and identifies the starting conditions as a function of these values. The first electrical component is a first actuator and the second electrical component is a second actuator or a sensor.Type: ApplicationFiled: January 15, 2015Publication date: July 16, 2015Inventors: Manuel Dangelmaier, Tim Gegg, Clemens Klatt
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Patent number: 9010454Abstract: The invention relates to a portable, handheld work apparatus such as a trimmer, a cut-off machine, a chain saw or the like, having a motor (5, 33) to drive a rotating, exchangeable work tool (13). A control unit (15) serves to control the operation of the motor (5, 33). The control unit (15) determines the rotational speed (n) and/or the power (P) of the motor (5, 33). According to the invention, the motor (5, 33) can be operated in a first operating mode (I) with reduced rotational speed (n0) and/or power (P0) and in at least a second operating mode (II) with an increased rotational speed (n1) and/or power (P1). In dependence on a release signal, the control uses exclusively the first operating mode (I) for a limited operation and the second operating mode (II) for an expanded operation.Type: GrantFiled: December 6, 2011Date of Patent: April 21, 2015Assignee: Andreas Stihl AG & Co. KGInventors: Andreas Neubauer, Tim Gegg
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Publication number: 20140034011Abstract: A method controls the rpm of a combustion engine in a hand-held work apparatus such as a brushcutter. The engine drives a work tool via a clutch which engages as a function of the engine rpm (n). A spark plug is arranged in the combustion chamber and is driven by an ignition unit. During start of the engine, an rpm lock circuit is active and defines a control variable as a function of the instantaneous rpm (nact) of the engine. According to the magnitude of this control variable, operating parameters of the engine are adapted to change the instantaneous rpm (nact). A control variable is determined for the adaptation of the operating parameters by the rpm lock circuit. The switch-off of the rpm lock circuit is provided when the control variable of the control lies outside a predetermined bandwidth of the absolute magnitude of the control variables.Type: ApplicationFiled: July 31, 2013Publication date: February 6, 2014Applicant: Andreas Stihl AG & Co. KGInventors: Tim Gegg, Armin Koelmel, Manuel Dangelmaier
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Patent number: 8469167Abstract: A centrifugal clutch, especially in a hand held work apparatus, such as a cut-off machine (1), a brush cutter or the like, having a rotational axis (20), at least one movably mounted centrifugal weight (25) arranged at the drive end and a clutch drum (16) arranged at the output end. The centrifugal clutch (15) includes a brake device (18) which is released by the centrifugal weight (25) when the centrifugal weight (25) moves radially outward in relation to the rotational axis (20).Type: GrantFiled: September 24, 2010Date of Patent: June 25, 2013Assignee: Andreas Stihl AG & Co. KGInventors: Sebastian Hanussek, Jörg Elfner, Tim Gegg
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Patent number: 8322326Abstract: An internal combustion engine (8) has an ignition device, a device for supplying fuel and a device for detecting the rpm of the engine (8). The engine (8) includes a permissible limit rpm (ng) and a control range (A) of the rpm (n) above the limit rpm (ng). A method for operating the engine (8) provides that the rpm of the engine (8) is limited in the control range (A) because of suppression of the ignition in individual engine cycles wherein the rpm (n) lies above a control rpm (na) lying in the control range (A). In the control range, and to improve the exhaust-gas values, the noncombustion engine cycle ratio (NECR) is adjusted. The NECR indicates the ratio of the number of engine cycles wherein the ignition is suppressed to the total number of ignitions.Type: GrantFiled: January 5, 2009Date of Patent: December 4, 2012Assignee: Andreas Stihl AG & Co. KGInventors: Tim Gegg, Manuel Dangelmaier, Andreas Neubauer, Wolfgang Layher
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Publication number: 20120138322Abstract: The invention relates to a portable, handheld work apparatus such as a trimmer, a cut-off machine, a chain saw or the like, having a motor (5, 33) to drive a rotating, exchangeable work tool (13). A control unit (15) serves to control the operation of the motor (5, 33). The control unit (15) determines the rotational speed (n) and/or the power (P) of the motor (5, 33). According to the invention, the motor (5, 33) can be operated in a first operating mode (I) with reduced rotational speed (n0) and/or power (P0) and in at least a second operating mode (II) with an increased rotational speed (n1) and/or power (P1). In dependence on a release signal, the control uses exclusively the first operating mode (I) for a limited operation and the second operating mode (II) for an expanded operation.Type: ApplicationFiled: December 6, 2011Publication date: June 7, 2012Inventors: Andreas Neubauer, Tim Gegg
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Publication number: 20110073435Abstract: A centrifugal clutch, especially in a hand held work apparatus, such as a cut-off machine (1), a brush cutter or the like, having a rotational axis (20), at least one movably mounted centrifugal weight (25) arranged at the drive end and a clutch drum (16) arranged at the output end. The centrifugal clutch (15) includes a brake device (18) which is released by the centrifugal weight (25) when the centrifugal weight (25) moves radially outward in relation to the rotational axis (20).Type: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Inventors: Sebastian Hanussek, Jörg Elfner, Tim Gegg
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Patent number: 7814888Abstract: A method for operating an internal combustion engine having a fuel system which feeds fuel at a given pressure to a metering valve provides that a controller defines the opening time and the closing time of the metering valve and correspondingly actuates the metering valve so that the metering valve opens and closes at the defined times. In order to permit precise metering of fuel even in high-speed internal combustion engines there is provision for the controller to define at least one of the times for the opening or closing of the metering valve while taking into account the counterpressure actually prevailing at the outlet opening of the metering valve.Type: GrantFiled: April 28, 2008Date of Patent: October 19, 2010Assignee: Andreas Stihl AG & Co. KGInventors: Heiko Roβkamp, Georg Maier, Tim Gegg, Wolfgang Layher, Arno Kinnen, Christine Hallé
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Publication number: 20090178648Abstract: An internal combustion engine (8) has an ignition device, a device for supplying fuel and a device for detecting the rpm of the engine (8). The engine (8) includes a permissible limit rpm (ng) and a control range (A) of the rpm (n) above the limit rpm (ng). A method for operating the engine (8) provides that the rpm of the engine (8) is limited in the control range (A) because of suppression of the ignition in individual engine cycles wherein the rpm (n) lies above a control rpm (na) lying in the control range (A). In the control range, and to improve the exhaust-gas values, the noncombustion engine cycle ratio (NECR) is adjusted. The NECR indicates the ratio of the number of engine cycles wherein the ignition is suppressed to the total number of ignitions.Type: ApplicationFiled: January 5, 2009Publication date: July 16, 2009Inventors: Tim Gegg, Manuel Dangelmaier, Andreas Neubauer, Wolfgang Layher
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Publication number: 20080264388Abstract: A method for operating an internal combustion engine having a fuel system which feeds fuel at a given pressure to a metering valve provides that a controller defines the opening time and the closing time of the metering valve and correspondingly actuates the metering valve so that the metering valve opens and closes at the defined times. In order to permit precise metering of fuel even in high-speed internal combustion engines there is provision for the controller to define at least one of the times for the opening or closing of the metering valve while taking into account the counterpressure actually prevailing at the outlet opening of the metering valve.Type: ApplicationFiled: April 28, 2008Publication date: October 30, 2008Inventors: Heiko Rosskamp, Georg Maier, Tim Gegg, Wolfgang Layher, Arno Kinnen, Christine Halle