Patents by Inventor Christian Daubner
Christian Daubner 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: 9050713Abstract: A power tool is disclosed. The power tool includes a striker, a guide tube in which the striker is guided along an axis, and a pneumatic chamber, which is closed by the striker, the guide tube and a valve device actuated by its own medium. A volume of the pneumatic chamber changes in the case of a movement of the striker along the axis. The valve device has a swivelable sealing element between the striker and the guide tube. The swivelable sealing element is swiveled into a retracted position when the striker moves in the impact direction and is swiveled into an extended position when the striker moves against the impact direction. In the retracted position, the sealing element has a first inflow surface. In the extended position, the sealing element has a second inflow surface. The second inflow surface is larger than the first inflow surface.Type: GrantFiled: June 9, 2011Date of Patent: June 9, 2015Assignee: Hilti AktiengesellschaftInventors: Markus Hartmann, Frank Kohlschmied, Christian Daubner
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Patent number: 9044847Abstract: A power tool and control method is disclosed. The power tool has a striker, which is guided along an axis parallel to an impact direction. A pneumatic chamber has a volume which varies with a movement of the striker along the axis. A valve device that is actuatable depending upon the movement direction of the striker connects the pneumatic chamber with an air reservoir. The valve device is actuated to open in the case of a movement of the striker in the impact direction and in the case of a movement of the striker against the impact direction is actuated to throttle or close. The throttled or closed valve device restricts an air flow flowing through it to a maximum of one tenth of the value as compared to the air flow in an opened position.Type: GrantFiled: June 9, 2011Date of Patent: June 2, 2015Assignee: Hilti AktiengesellschaftInventors: Frank Kohlschmied, Christian Daubner, Markus Hartmann
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Patent number: 8939229Abstract: A power tool is disclosed. The power tool has a striker, which is guided along an axis in a guide tube. A pneumatic chamber has a volume which varies with a movement of the striker. The pneumatic chamber is closed by the striker, the guide tube and a valve device. The valve device has in a flow channel a sealing element that is moveable between two positions in a bearing along the axis. The flow channel has a first cross-sectional area in a first of the two positions of the sealing element adjacent to a first mating surface of the bearing, and the flow channel has a second cross-sectional area in a second of the two positions of the sealing element adjacent to second mating surface of the bearing offset from the first mating surface along the axis. The second cross-sectional area is greater than the first cross-sectional area.Type: GrantFiled: June 9, 2011Date of Patent: January 27, 2015Assignee: Hilti AktiengesellschaftInventors: Markus Hartmann, Frank Kohlschmied, Christian Daubner
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Publication number: 20110303431Abstract: A power tool is disclosed. The power tool includes a striker, a guide tube in which the striker is guided along an axis, and a pneumatic chamber, which is closed by the striker, the guide tube and a valve device actuated by its own medium. A volume of the pneumatic chamber changes in the case of a movement of the striker along the axis. The valve device has a swivelable sealing element between the striker and the guide tube. The swivelable sealing element is swiveled into a retracted position when the striker moves in the impact direction and is swiveled into an extended position when the striker moves against the impact direction. In the retracted position, the sealing element has a first inflow surface. In the extended position, the sealing element has a second inflow surface. The second inflow surface is larger than the first inflow surface.Type: ApplicationFiled: June 9, 2011Publication date: December 15, 2011Applicant: Hilti AktiengesellschaftInventors: Markus HARTMANN, Frank Kohlschmied, Christian Daubner
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Publication number: 20110303430Abstract: A power tool is disclosed. The power tool has a striker, which is guided along an axis in a guide tube. A pneumatic chamber has a volume which varies with a movement of the striker. The pneumatic chamber is closed by the striker, the guide tube and a valve device. The valve device has in a flow channel a sealing element that is moveable between two positions in a bearing along the axis. The flow channel has a first cross-sectional area in a first of the two positions of the sealing element adjacent to a first mating surface of the bearing, and the flow channel has a second cross-sectional area in a second of the two positions of the sealing element adjacent to second mating surface of the bearing offset from the first mating surface along the axis. The second cross-sectional area is greater than the first cross-sectional area.Type: ApplicationFiled: June 9, 2011Publication date: December 15, 2011Applicant: Hilti AktiengesellschaftInventors: Markus HARTMANN, Frank Kohlschmied, Christian Daubner
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Publication number: 20110303429Abstract: A power tool and control method is disclosed. The power tool has a striker, which is guided along an axis parallel to an impact direction. A pneumatic chamber has a volume which varies with a movement of the striker along the axis. A valve device that is actuatable depending upon the movement direction of the striker connects the pneumatic chamber with an air reservoir. The valve device is actuated to open in the case of a movement of the striker in the impact direction and in the case of a movement of the striker against the impact direction is actuated to throttle or close. The throttled or closed valve device restricts an air flow flowing through it to a maximum of one tenth of the value as compared to the air flow in an opened position.Type: ApplicationFiled: June 9, 2011Publication date: December 15, 2011Applicant: Hilti AktiengesellschaftInventors: Frank KOHLSCHMIED, Christian Daubner, Markus Hartmann
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Publication number: 20060237206Abstract: A percussion mechanism (21; 41) for a percussion power tool includes an impact element (24; 44) reciprocating along a percussion axis (22; 42) of the percussion mechanism (21; 41) and acting on the striker (26, 46). The contact point (27, 47) and counter-contact point (28, 48) are provided between the striker (26, 46) and the impact element (24, 44), with the contact point (27, 47) being formed as an exposed contact point and being arranged outside of the percussion axis (22; 42).Type: ApplicationFiled: March 9, 2006Publication date: October 26, 2006Inventors: Michael Schamberger, Erwin Manschitz, Christian Daubner, Josef Bauer
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Patent number: 7048076Abstract: An electrical hand-held tool includes an electric motor (2) having a rotor shaft (3) extending transverse to the tool percussion axis (A), a rotor sheet stack (4) supported on the rotor shaft, and a pinion (5) supported on the rotor shaft, a percussion mechanism (6) including an eccentric (7), and a drive gear (8) engageable with the motor pinion (5) for driving the eccentric (7), with the rotor sheet stack (4) being arranged, with respect to the percussion axis A, completely diametrically opposite the drive gear (8).Type: GrantFiled: December 18, 2003Date of Patent: May 23, 2006Assignee: Hilti AktiengesellschaftInventors: Holger Cecchin, Christian Daubner, Hubert Daxenberger, David Hruza, Christoph Kink, Ferdinand Kristen, Erwin Manschitz, Hans-Juergen Pfisterer, Walter Wissmach
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Patent number: 6962211Abstract: A vibration-decoupling arrangement for supporting a percussion unit (2) in a hand-held percussion power tool includes a spring (4) arranged between the percussion unit (2) and a tool housing (3) and preloaded against an engagement point (P) in the housing (3) for preventing vibrations of the percussion unit (2) from being transmitted to the housing (3), and two axially spaced, flexurally deformable, articulated arms (5a, 5b) secured in the housing (3) for supporting the percussion unit (2) in the housing (3), with the arms (5a, 5b) being secured in the housing (3) with a possibility of a limited axial displacement and without any slip motion relative to the housing.Type: GrantFiled: November 20, 2003Date of Patent: November 8, 2005Assignee: Hilti AktiengesellschaftInventors: Christian Daubner, Hubert Daxenberger, Erwin Manschitz, Ralph Neuhauser
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Publication number: 20040182589Abstract: An electrical hand-held tool includes an electric motor (2) having a rotor shaft (3) extending transverse to the tool percussion axis (A), a rotor sheet stack (4) supported on the rotor shaft, and a pinion (5) supported on the rotor shaft, a percussion mechanism (6) including an eccentric (7), and a drive gear (8) engageable with the motor pinion (5) for driving the eccentric (7), with the rotor sheet stack (4) being arranged, with respect to the percussion axis A, completely diametrically opposite the drive gear (8).Type: ApplicationFiled: December 18, 2003Publication date: September 23, 2004Inventors: Holger Cecchin, Christian Daubner, Hubert Daxenberger, David Hruza, Christoph Kink, Ferdinand Kristen, Erwin Manschitz, Hans-Juergen Pfisterer, Walter Wissmach
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Publication number: 20040154813Abstract: A vibration-decoupling arrangement for supporting a percussion unit (2) in a hand-held percussion power tool includes a spring (4) arranged between the percussion unit (2) and a tool housing (3) and preloaded against an engagement point (P) in the housing (3) for preventing vibrations of the percussion unit (2) from being transmitted to the housing (3), and two axially spaced, flexurally deformable, articulated arms (5a, 5b) secured in the housing (3) for supporting the percussion unit (2) in the housing (3), with the arms (5a, 5b) being secured in the housing (3) with a possibility of a limited axial displacement and without any slip motion relative to the housing.Type: ApplicationFiled: November 20, 2003Publication date: August 12, 2004Inventors: Christian Daubner, Hubert Daxenberger, Erwin Manschitz, Ralph Neuhauser