Patents by Inventor Karin GROTH
Karin GROTH 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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Publication number: 20260115879Abstract: A striking mechanism (15) having an idle-strike damping element and a rebound-strike damping element (6, 7), which interact with a tool holder (3), wherein the tool holder (3) is mounted via at least two plain bearings (13a, 13b) to a guide housing (5), and wherein the idle-strike damping element and the rebound-strike damping element (6, 7) are arranged at an axial distance relative to one another on the outer circumferential side of the tool holder (3). It is provided that the idle-strike damping element (6) and/or the rebound-strike damping element (7) is coupled to the tool holder (3) via a front-side or inner circumferential toothing (8) and the same damping element (6 or 7) is coupled to the guide housing (5) via a front-side or outer circumferential toothing (11). A power tool (2), in particular a drill or chisel hammer, having a striking mechanism (15).Type: ApplicationFiled: October 8, 2025Publication date: April 30, 2026Inventors: Julian HARBAUM, Ulrich MANDEL, Karin GROTH
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Publication number: 20250205868Abstract: Side handle for an electrical hand-held power tool, the side handle having a gripping region designed for gripping by a user and a clamping unit by which the side handle can be detachably fastened to a tool neck of the hand-held power tool, wherein the clamping unit has an operating element by which the clamping unit can be clamped and released, wherein the clamping unit substantially contains a clamping lever, a clamping element, a counter clamping element and a connecting device, and when the clamping unit is clamped, a force flow passes through the clamping unit and the counter clamping element can be moved relative to the gripping region.Type: ApplicationFiled: March 6, 2023Publication date: June 26, 2025Inventors: Karin GROTH, Daniela LACHICA KOCH, Markus SOMMER, Steffen MUCHA
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Patent number: 12257683Abstract: An electric hand-held power tool, in particular a hammer drill and/or chipping hammer, having an electropneumatic impact mechanism which has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in an axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing via an end plate of the transmission housing on the other side, wherein the transmission housing is subdivided at least into a main shell and a cover shell separate from the main shell, such that the guide tube is braced against the main shell at least partially by the cover shell.Type: GrantFiled: March 25, 2021Date of Patent: March 25, 2025Assignee: Hilti AktiengesellschaftInventors: Ernst-Rudolf Lübkert, Karin Groth, Uto Plank, Manuel Rosenzweig, Andres Wellmann Jelic
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Patent number: 12151351Abstract: An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.Type: GrantFiled: June 15, 2021Date of Patent: November 26, 2024Assignee: Hilti AktiengesellschaftInventors: Ernst-Rudolf Lübkert, Uto Plank, Karin Groth
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Patent number: 12011802Abstract: A clamping device (10) for the axial (AR) clamping of a tool disk (300) on a flange (30) associated with a drive spindle (20) of a hand-held power tool (100), wherein the clamping device (100) has a screw (2), which is to be screwed into an internal thread (22) of the drive spindle (20) to securely clamp the tool disk (300), wherein the screw (2) is mounted in a coupling module (1) of the clamping device (10), wherein the coupling module (1) has an internal contour (16) which is paired or can be paired positively with the drive spindle (20) for conjoint rotation in the circumferential direction (U).Type: GrantFiled: October 16, 2018Date of Patent: June 18, 2024Assignee: Hilti AktiengesellschaftInventors: Thomas Blatz, Karin Groth
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Publication number: 20230311288Abstract: An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.Type: ApplicationFiled: June 15, 2021Publication date: October 5, 2023Inventors: Ernst-Rudolf LÜBKERT, Uto PLANK, Karin GROTH
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Publication number: 20230142832Abstract: An electric hand-held power tool, in particular a hammer drill and/or chipping hammer, having an electropneumatic impact mechanism which has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in an axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing via an end plate of the transmission housing on the other side, wherein the transmission housing is subdivided at least into a main shell and a cover shell separate from the main shell, such that the guide tube is braced against the main shell at least partially by the cover shell.Type: ApplicationFiled: March 25, 2021Publication date: May 11, 2023Inventors: Ernst-Rudolf LÜBKERT, Karin GROTH, Uto PLANK, Manuel ROSENZWEIG, Andres WELLMANN JELIC
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Patent number: 11103973Abstract: A clamping device for axially clamping a disk-shaped tool on a flange of a spindle of a machine tool, includes a clamping disk which rests against the tool in a friction-fitting manner in the clamped state, a screw which is screwed into a threaded receiving opening in an end face of the spindle, an operating element which is connected to the screw in a rotationally fixed manner, and a first securing element which interacts with a corresponding second securing element provided on a flange such that when the screw is at least partly introduced into the receiving opening, the clamping disk is rotationally secured to the flange in a form-fitting manner, where the clamping disk can be rotated relative to the screw and the operating element. The first securing element can be rotated relative to the screw and is mounted in a rotationally fixed manner relative to the clamping disk.Type: GrantFiled: January 31, 2017Date of Patent: August 31, 2021Assignee: Hilti AktiengesellschaftInventor: Karin Groth
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Publication number: 20200324385Abstract: A clamping device (10) for the axial (AR) clamping of a tool disk (300) on a flange (30) associated with a drive spindle (20) of a hand-held power tool (100), wherein the clamping device (100) has a screw (2), which is to be screwed into an internal thread (22) of the drive spindle (20) to securely clamp the tool disk (300), wherein the screw (2) is mounted in a coupling module (1) of the clamping device (10), wherein the coupling module (1) has an internal contour (16) which is paired or can be paired positively with the drive spindle (20) for conjoint rotation in the circumferential direction (U).Type: ApplicationFiled: October 16, 2018Publication date: October 15, 2020Inventors: Thomas BLATZ, Karin GROTH
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Publication number: 20190039205Abstract: A clamping device for axially clamping a disk-shaped tool on a flange of a spindle of a machine tool, includes a clamping disk which rests against the tool in a friction-fitting manner in the clamped state, a screw which is screwed into a threaded receiving opening in an end face of the spindle, an operating element which is connected to the screw in a rotationally fixed manner, and a first securing element which interacts with a corresponding second securing element provided on a flange such that when the screw is at least partly introduced into the receiving opening, the clamping disk is rotationally secured to the flange in a form-fitting manner, where the clamping disk can be rotated relative to the screw and the operating element. The first securing element can be rotated relative to the screw and is mounted in a rotationally fixed manner relative to the clamping disk.Type: ApplicationFiled: January 31, 2017Publication date: February 7, 2019Applicant: Hilti AktiengesellschaftInventor: Karin GROTH