Patents by Inventor Armin Eisenhardt
Armin Eisenhardt 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: 10376971Abstract: A pipe milling machine for separating and/or cutting a pipe to length includes a drive unit configured to generate a feed force to the pipe and a holding device configured to hold the pipe. The holding device is mountable around the pipe, the drive unit engages in or touches down on the holding device, the feed force is transferred to the holding device in a location, which contacts the pipe or which is adjacent to a location which contacts the pipe, and/or the drive unit is guided by the holding device.Type: GrantFiled: May 3, 2017Date of Patent: August 13, 2019Assignee: C. & E. Fein GmbHInventors: Armin Eisenhardt, Boris Richt, Jonas Buck
-
Patent number: 10207346Abstract: A pipe milling machine for separating and/or cutting a pipe to length is disclosed. In an embodiment the pipe milling machine includes a milling wheel configured to separate the pipe and a motor configured to generate a feed of the pipe milling machine and to drive the milling wheel, wherein driving the milling wheel is independent of separating the pipe.Type: GrantFiled: May 3, 2017Date of Patent: February 19, 2019Assignee: C & E Fein GmbHInventors: Armin Eisenhardt, Boris Richt
-
Publication number: 20170320147Abstract: A pipe milling machine for separating and/or cutting a pipe to length is disclosed. In an embodiment the pipe milling machine includes a milling wheel configured to separate the pipe and a motor configured to generate a feed of the pipe milling machine and to drive the milling wheel, wherein driving the milling wheel is independent of separating the pipe.Type: ApplicationFiled: May 3, 2017Publication date: November 9, 2017Inventors: Armin Eisenhardt, Boris Richt
-
Publication number: 20170320148Abstract: A pipe milling machine for separating and/or cutting a pipe to length is disclosed. In an embodiment, the pipe milling machine includes a drive unit configured to generate a feed force to the pipe and a holding device configured to hold the pipe, wherein the holding device is mountable around the pipe, wherein the drive unit engages in or touches down on the holding device, wherein the feed force is transferred to the holding device in a location, which contacts the pipe or which is adjacent to a location which contacts the pipe, and/or wherein the drive unit is guided by the holding device.Type: ApplicationFiled: May 3, 2017Publication date: November 9, 2017Inventors: Armin Eisenhardt, Boris Richt, Jonas Buck
-
Patent number: 9216459Abstract: The invention discloses a drilling machine, in particular a hand-held core drilling machine, having a drive with a motor that can be coupled to a tool spindle in order to drive the latter, wherein the drive allows at least a first transmission stage and a second transmission stage, having a center mount for mounting a pilot drill and having a tool mount for mounting a drill bit, wherein the drill bit and the pilot drill can be mounted substantially concentrically with one another, wherein the pilot drill, in particular in order to drill a pilot hole, can be driven in a first rotational speed range by means of the first transmission stage and wherein the drill bit, in particular in order to drill a core hole, can be driven in a second rotational speed range by means of the second transmission stage.Type: GrantFiled: April 27, 2012Date of Patent: December 22, 2015Assignee: C. & E. FEIN GMBHInventors: Boris Richt, Armin Eisenhardt
-
Patent number: 8651197Abstract: A manually operated hammer drill (1) includes a spindle (3) that drives a chuck (5) in a rotary manner about an axis of rotation (6) in a drilling mode, and includes a pneumatic hammer mechanism (4), that hammers against a tool inserted in the chuck (5) in a hammer mode. The hammer mechanism (4) has a piston (10) which performs reciprocating movements (12) parallel to the axis of rotation (6) in a cylinder (11) conformed inside the spindle (3) when hammer mode is activated. The piston (10) has at least one radial groove (21) in which an annular seal (22) is arranged.Type: GrantFiled: January 28, 2011Date of Patent: February 18, 2014Assignee: AEG Electric Tools GmbHInventors: Armin Eisenhardt, Hans Klöpfer
-
Patent number: 8622148Abstract: A hand-operated power tool, particularly a hammer drill (1), includes a drive motor (2), a tool spindle (3) to drive a tool in rotary manner, a rotary drive transmission (4) to couple the drive motor (2) to the tool spindle (3), a hammer mechanism (5) to drive the tool in percussive manner, a hammer mechanism transmission (6) to couple the drive motor (2) to the hammer mechanism (5), and a switching device (7) to activate and deactivate the hammer mechanism (5). The switching device (7) has a clutch (9) that is integrated in a force path (10) of the hammer mechanism transmission (6) and has an actuation stroke (11) for advancing and withdrawing the clutch (6), which stroke extends perpendicularly to the axis of rotation (8) of the tool spindle (3), or parallel to an axis of rotation (37) of an actuating element (28) that is rotated manually to actuate the switching device (7) for advancing and withdrawing the clutch (6).Type: GrantFiled: January 19, 2011Date of Patent: January 7, 2014Assignee: AEG Electric Tools GmbHInventor: Armin Eisenhardt
-
Patent number: 8496073Abstract: The invention relates to a portable power tool having a motor housing (1) and a separate handle housing (3) fastened to the motor housing (1) by means of an elastic vibration damper (2) and secured thereon in a positive-locking manner. The vibration damper (2) is composed of a fastening sleeve (4) assigned to the motor housing (1), an elastic damping sleeve (5) coaxially enclosing the fastening sleeve (4) and a handle holder (6) likewise coaxially enclosing the fastening sleeve (4) and the damping sleeve (5) and assigned to the handle housing (3). The essentially rigid construction unit consisting of the handle holder (6) and the handle housing (3) is secured in a positive-locking manner, with play, directly to the essentially rigid construction unit consisting of the fastening sleeve (4) and the motor housing (1).Type: GrantFiled: October 29, 2005Date of Patent: July 30, 2013Assignee: AEG Electric Tools GmbHInventors: Armin Eisenhardt, Horst Fahrner
-
Publication number: 20120275874Abstract: The invention discloses a drilling machine, in particular a hand-held core drilling machine, having a drive with a motor that can be coupled to a tool spindle in order to drive the latter, wherein the drive allows at least a first transmission stage and a second transmission stage, having a center mount for mounting a pilot drill and having a tool mount for mounting a drill bit, wherein the drill bit and the pilot drill can be mounted substantially concentrically with one another, wherein the pilot drill, in particular in order to drill a pilot hole, can be driven in a first rotational speed range by means of the first transmission stage and wherein the drill bit, in particular in order to drill a core hole, can be driven in a second rotational speed range by means of the second transmission stage.Type: ApplicationFiled: April 27, 2012Publication date: November 1, 2012Inventors: Boris Richt, Armin Eisenhardt
-
Publication number: 20110186317Abstract: A manually operated hammer drill (1) includes a spindle (3) that drives a chuck (5) in a rotary manner about an axis of rotation (6) in a drilling mode, and includes a pneumatic hammer mechanism (4), that hammers against a tool inserted in the chuck (5) in a hammer mode. The hammer mechanism (4) has a piston (10) which performs reciprocating movements (12) parallel to the axis of rotation (6) in a cylinder (11) conformed inside the spindle (3) when hammer mode is activated. The piston (10) has at least one radial groove (21) in which an annular seal (22) is arranged.Type: ApplicationFiled: January 28, 2011Publication date: August 4, 2011Inventors: Armin Eisenhardt, Hans Klöpfer
-
Publication number: 20110174510Abstract: A hand-operated power tool, particularly a hammer drill (1), includes a drive motor (2), a tool spindle (3) to drive a tool in rotary manner, a rotary drive transmission (4) to couple the drive motor (2) to the tool spindle (3), a hammer mechanism (5) to drive the tool in percussive manner, a hammer mechanism transmission (6) to couple the drive motor (2) to the hammer mechanism (5), and a switching device (7) to activate and deactivate the hammer mechanism (5). The switching device (7) has a clutch (9) that is integrated in a force path (10) of the hammer mechanism transmission (6) and has an actuation stroke (11) for advancing and withdrawing the clutch (6), which stroke extends perpendicularly to the axis of rotation (8) of the tool spindle (3), or parallel to an axis of rotation (37) of an actuating element (28) that is rotated manually to actuate the switching device (7) for advancing and withdrawing the clutch (6).Type: ApplicationFiled: January 19, 2011Publication date: July 21, 2011Inventor: Armin Eisenhardt
-
Publication number: 20080223594Abstract: The invention relates to a portable power tool having a motor housing (1) and a separate handle housing (3) fastened to the motor housing (1) by means of an elastic vibration damper (2) and secured thereon in a positive-locking manner. The vibration damper (2) is composed of a fastening sleeve (4) assigned to the motor housing (1), an elastic damping sleeve (5) coaxially enclosing the fastening sleeve (4) and a handle holder (6) likewise coaxially enclosing the fastening sleeve (4) and the damping sleeve (5) and assigned to the handle housing (3). The essentially rigid construction unit consisting of the handle holder (6) and the handle housing (3) is secured in a positive-locking manner, with play, directly to the essentially rigid construction unit consisting of the fastening sleeve (4) and the motor housing (1).Type: ApplicationFiled: October 29, 2005Publication date: September 18, 2008Inventors: Armin Eisenhardt, Horst Fahrner
-
Patent number: 7407460Abstract: A planetary gearbox for a power tool has a planetary carrier and a rotatable sleeve with sun wheel toothing arranged centrally on the planetary carrier. The sleeve has a radial section with outer toothing. Planet wheels are positioned between planetary carrier and radial section and mesh with the sun wheel toothing. A switching ring gear surrounds the planet wheels and has an inner toothing meshing with the planet wheels. The switching ring gear is axiallay moveable on the planet wheels between first and second end positions for switching a transmission ratio. In the second end position the switching ring gear engages the outer toothing of the radial section. A synchronization disk, rotating with the rotary sleeve, is positioned between planet wheels and radial section and acts directly or indirectly by friction on the switching ring gear when the latter is moved from the first into the second end position.Type: GrantFiled: September 23, 2005Date of Patent: August 5, 2008Assignee: A & M Electric Tools GmbHInventor: Armin Eisenhardt
-
Patent number: 7044882Abstract: A switchable gearbox of a handheld power tool has a gear having a first switching stage and a second switching stage arranged sequentially in an axial direction of the gear, wherein the gear comprises a gear arrangement movable in the axial direction of the gear between the first and second switching stages. An actuator is rotatable about an axis parallel to the axial direction of the gear. At least one shifting gate is rotatable together with the actuator wherein the shifting gate interacts with the gear arrangement for moving the gear arrangement in the axial direction. The shifting gate has a central area extending linearly and at a slant relative to a circumferential direction of the gear and end sections on each end of the central area, wherein the end sections extend parallel to the circumferential direction.Type: GrantFiled: March 31, 2004Date of Patent: May 16, 2006Assignee: Atlas Copco Electric Tools GmbHInventor: Armin Eisenhardt
-
Publication number: 20060068968Abstract: A planetary gearbox for a power tool has a planetary carrier and a rotatable sleeve with sun wheel toothing arranged centrally on the planetary carrier. The sleeve has a radial section with outer toothing. Planet wheels are positioned between planetary carrier and radial section and mesh with the sun wheel toothing. A switching ring gear surrounds the planet wheels and has an inner toothing meshing with the planet wheels. The switching ring gear is axiallay moveable on the planet wheels between first and second end positions for switching a transmission ratio. In the second end position the switching ring gear engages the outer toothing of the radial section. A synchronization disk, rotating with the rotary sleeve, is positioned between planet wheels and radial section and acts directly or indirectly by friction on the switching ring gear when the latter is moved from the first into the second end position.Type: ApplicationFiled: September 23, 2005Publication date: March 30, 2006Applicant: A + M ELECTRIC TOOLS GMBHInventor: Armin Eisenhardt
-
Publication number: 20040198547Abstract: A switchable gearbox of a handheld power tool has a gear having a first switching stage and a second switching stage arranged sequentially in an axial direction of the gear, wherein the gear comprises a gear arrangement movable in the axial direction of the gear between the first and second switching stages. An actuator is rotatable about an axis parallel to the axial direction of the gear. At least one shifting gate is rotatable together with the actuator wherein the shifting gate interacts with the gear arrangement for moving the gear arrangement in the axial direction. The shifting gate has a central area extending linearly and at a slant relative to a circumferential direction of the gear and end sections on each end of the central area, wherein the end sections extend parallel to the circumferential direction.Type: ApplicationFiled: March 31, 2004Publication date: October 7, 2004Applicant: ATLAS COPCO ELECTRIC TOOLS GMBHInventor: Armin Eisenhardt
-
Patent number: 5706902Abstract: In a power hand tool, especially a screwdriver, with a motor, a planet gear and a rotary impulse generator, a spring mechanism is provided to damp vibrations of the housing caused by the rotary impulse generator. To improve the damping with a simple design, one end of a compression spring is supported on a ring, which in turn is guided at a coil which is parallel to the axis, on the one hand, and is guided displaceably in parallel to the axis between a part rigidly connected to the housing and a part exposed to the rotary impact, on the other hand. The other end of the compression spring is supported on a part rigidly connected to the housing.Type: GrantFiled: March 13, 1996Date of Patent: January 13, 1998Assignee: Atlas Copco Elektrowerzeuge GmbHInventor: Armin Eisenhardt