Patents by Inventor Ernst-Rudolf Luebkert

Ernst-Rudolf Luebkert 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: 11858109
    Abstract: Side handle for an electric hand-held power tool, wherein the side handle has a grip region designed to be gripped by a user, and a clamping unit, by which the side handle can be releasably fastened to a machine neck of the hand-held power tool, wherein the clamping unit has an operating element, by which the clamping unit is able to be clamped and unclamped, wherein the operating element, when the clamping unit is in the clamped state, is substantially flush with the surface of the grip region. The operating element is preferably in the form of a clamping lever.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: January 2, 2024
    Assignee: Hilti Aktiengesellschaft
    Inventors: Daniela Lachica Koch, Philipp Amelung, Martin Siemen, Manuel Roelecke, Konstantin Wullbrandt, Tobias Ströer, Isabel Völz, Hui Sun, Dogukan Mintas, Michael Göttlinger, Julian Janke, Ernst-Rudolf Lübkert, Markus Sommer, Georg Kugelmann, Maximilian Kummer, Steffen Mucha, Silke Topp
  • Patent number: 11833652
    Abstract: A power tool for chiseling and drilling includes a housing, a motor disposed inside the housing, and a pneumatic percussion mechanism. An operation mode selector switch is disposed on the housing and has a first operation mode setting and a second operation mode setting where the first operation mode setting activates the pneumatic percussion mechanism and the second operation mode setting deactivates the pneumatic percussion mechanism. A valve has an inlet-port formed inside the guiding tube and an outlet-port formed outside the guiding tube where the valve is connected to the operation mode selector switch. The valve is closed in the first operation mode setting which disables an air exchange between the inlet-port and the outlet-port and the valve is open in the second operation mode setting which enables the air exchange between the inlet-port and the outlet-port.
    Type: Grant
    Filed: January 25, 2022
    Date of Patent: December 5, 2023
    Assignee: Hilti Aktiengesellschaft
    Inventors: Rory Britz, Frank Fritsch, Thomas Hofbrucker, Ernst-Rudolf Luebkert, Kathrin Sax, Stefan Schmid, Aaron Wiedner
  • Publication number: 20230311288
    Abstract: 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: Application
    Filed: June 15, 2021
    Publication date: October 5, 2023
    Inventors: Ernst-Rudolf LÜBKERT, Uto PLANK, Karin GROTH
  • Publication number: 20230241751
    Abstract: A power tool for chiseling and drilling includes a housing, a motor disposed inside the housing, and a pneumatic percussion mechanism. An operation mode selector switch is disposed on the housing and has a first operation mode setting and a second operation mode setting where the first operation mode setting activates the pneumatic percussion mechanism and the second operation mode setting deactivates the pneumatic percussion mechanism. A valve has an inlet-port formed inside the guiding tube and an outlet-port formed outside the guiding tube where the valve is connected to the operation mode selector switch. The valve is closed in the first operation mode setting which disables an air exchange between the inlet-port and the outlet-port and the valve is open in the second operation mode setting which enables the air exchange between the inlet-port and the outlet-port.
    Type: Application
    Filed: January 25, 2022
    Publication date: August 3, 2023
    Inventors: Rory BRITZ, Frank FRITSCH, Thomas HOFBRUCKER, Ernst-Rudolf LUEBKERT, Kathrin SAX, Stefan SCHMID, Aaron WIEDNER
  • Publication number: 20230150103
    Abstract: 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 guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is designed as an externally toothed gearwheel and is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing about an axis of rotation on the other side, an axial gap, preferably for optionally receiving at least part of a lubrication space separating element, is provided between an eccentric wheel surface facing the connecting rod and a connecting rod surface facing the eccentric wheel.
    Type: Application
    Filed: April 7, 2021
    Publication date: May 18, 2023
    Inventors: Ernst-Rudolf LÜBKERT, Uto PLANK, Jochen ERHARDT
  • Publication number: 20230142832
    Abstract: 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: Application
    Filed: March 25, 2021
    Publication date: May 11, 2023
    Inventors: Ernst-Rudolf LÜBKERT, Karin GROTH, Uto PLANK, Manuel ROSENZWEIG, Andres WELLMANN JELIC
  • Publication number: 20220241953
    Abstract: Side handle for an electric hand-held power tool, wherein the side handle has a grip region designed to be gripped by a user, and a clamping unit, by which the side handle can be releasably fastened to a machine neck of the hand-held power tool, wherein the clamping unit has an operating element, by which the clamping unit is able to be clamped and unclamped, wherein the operating element, when the clamping unit is in the clamped state, is substantially flush with the surface of the grip region. The operating element is preferably in the form of a clamping lever.
    Type: Application
    Filed: June 16, 2020
    Publication date: August 4, 2022
    Inventors: Daniela LACHICA KOCH, Philipp AMELUNG, Martin SIEMEN, Manuel ROELECKE, Konstantin WULLBRANDT, Tobias STRÖER, Isabel VÖLZ, Hui SUN, Dogukan MINTAS, Michael GÖTTLINGER, Julian JANKE, Ernst-Rudolf LÜBKERT, Markus SOMMER, Georg KUGELMANN, Maximilian KUMMER, Steffen MUCHA, Silke TOPP
  • Publication number: 20210347030
    Abstract: The handle for a handheld power tool includes a grip portion which can be gripped by a user, a fastening portion by which the handle can be fastened to the handheld power tool, and an oscillation decoupling device which is designed to decouple oscillations acting on the fastening portion from the grip portion, wherein the oscillation decoupling device has a spring element with a settable spring stiffness
    Type: Application
    Filed: July 10, 2019
    Publication date: November 11, 2021
    Inventors: Ernst-Rudolf LÜBKERT, Adrian STEINGRUBER
  • Publication number: 20210323135
    Abstract: An eccentric drive 1 for a portable power tool 2 has a motor 5, an eccentric wheel 6, a linear guide 9, a slide 8 and a connecting rod 7, which has a head 17 suspended on the slide 8 and a second head 15 suspended on the eccentric wheel 6. A bearing bush 16 for the rotatable mounting of the connecting rod 7 is provided at least on one of the two heads 17. The head 15 is composed of an injection molding material. The bearing bush 16 is composed of a fiber composite material, which includes continuous carbon fibers 25 embedded in a thermoplastic matrix.
    Type: Application
    Filed: September 24, 2019
    Publication date: October 21, 2021
    Inventors: Ernst-Rudolf LÜBKERT, Ferdinand KRISTEN, Michael GÖTTLINGER, Maximilian KUMMER, Michael SCHAMBERGER, Johannes MARDER, Jeltsch THOMAS, Simon WEIS, Andreas JANISCH
  • Publication number: 20190299502
    Abstract: A method for using an injection mold for manufacturing plastic components, in particular components of power tools, the injection mold containing a sprue plate, a push-in device and an ejector plate. A cavity is between the sprue plate and the ejector plate when the sprue plate and the ejector plate are in an assembled state, and the ejector plate containing a fiber channel, through which a fiber bundle having a thermoplastic matrix is transportable to the cavity, via the push-in device, along at least part of the sprue plate. The method includes assembling the sprue plate and the ejector plate; heating the fiber bundle together with the thermoplastic matrix; positioning the fiber bundle at the cavity via the push-in device; introducing a liquid plastic into the cavity through a channel of the sprue plate; and introducing the fiber bundle into the cavity so that the fiber bundle is positioned in the cavity by the stream of liquid plastic.
    Type: Application
    Filed: September 6, 2017
    Publication date: October 3, 2019
    Inventor: Ernst-Rudolf LUEBKERT
  • Publication number: 20130264159
    Abstract: A production method for an absorber (20) in which a baseplate (24) made of plastic and a support plate (25) made of plastic are arranged at a distance parallel to each other is provided. An elastomer for a spring element (21) is injected between the support plate (25) and the baseplate (24), and a metal mass element (22) is joined positively and/or non-positively to a side of the support plate (25) facing away from the spring element (21).
    Type: Application
    Filed: November 9, 2011
    Publication date: October 10, 2013
    Applicant: Hilti Aktiengesellschaft
    Inventors: Adrian Steingruber, Ernst-Rudolf Luebkert
  • Publication number: 20130264086
    Abstract: A hand-held power tool (1) is provided. The hand-held power tool has a housing, a linear drive for moving a tool along a working axis (9) and an absorber (20). The absorber (20) is formed by layers stacked in a structuring direction (23) perpendicular to the working axis (9) consisting of a baseplate (24) made of plastic, a spring element (21) comprising an elastomer, a support plate (25) made of a plastic, a spring element (21) comprising an elastomer and a mass element (22) fastened onto the support plate (25). The spring element (21) is joined to the baseplate (24) and/or to the support plate (25) with a material bond.
    Type: Application
    Filed: November 9, 2011
    Publication date: October 10, 2013
    Applicant: Hilti Aktiengesellschaft
    Inventors: Adrian Steingruber, Ernst-Rudolf Luebkert
  • Patent number: 7827718
    Abstract: A hand-held power tool includes a housing (4), and a tag-shaped identification element (14.1; 14.2) mountable on the housing (4) so that it becomes visible on an outer side of the housing (4), provided with an identification mark (16.1; 16.2), insertable in a receptacle (20.1; 20.2) provided on the housing.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: November 9, 2010
    Assignee: Hilti Aktiengesellschaft
    Inventors: Ernst-Rudolf Luebkert, Hans Appel, Pierre Pallmer, Armin Oeffling
  • Patent number: 7673703
    Abstract: A hand-held power tool having a main housing (4) in which a tool spindle (10) is at least partially located, and a handle housing (16) on which a handle (18) is formed, includes a connection device (28) for securing the handle housing (16) to the main housing (16) and having a first connection element (50) with a first engagement member (58) loosely engageable with a second engagement member (52) associated with the main housing (4), and a second connection element (48) with a handle-side locking element, a main housing side locking element, and a further locking element for formlockingly connecting the handle-side locking element and the main housing side locking element, whereby absence of loose engagement of the first and second engagement members is ensured upon formation of the formlocking connection of the handle-side and main housing side locking elements.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: March 9, 2010
    Assignee: Hilti Aktiengesellschaft
    Inventors: Axel Fischer, Ernst-Rudolf Luebkert, Pierre Pallmer
  • Publication number: 20080282850
    Abstract: A hand-held power tool includes a housing (4), and a tag-shaped identification element (14.1; 14.2) mountable on the housing (4) so that it becomes visible on an outer side of the housing (4), provided with an identification mark (16.1; 16.2), insertable in a receptacle (20.1; 20.2) provided on the housing.
    Type: Application
    Filed: May 8, 2008
    Publication date: November 20, 2008
    Inventors: Ernst-Rudolf Luebkert, Hans Appel, Pierre Pallmer, Armin Oeffling
  • Patent number: 7372180
    Abstract: An electric motor includes a stator (3) secured in the motor housing (2), a rotatable rotor (4), a fan impeller (5) arranged on the rotor (4), and an annular air duct (6) arranged between the fan impeller (5) and the rotor (4) and having a shroud (7) spaced from the impeller (5) by a slot having an axial width (X), a dimensionally stable, with respect to the shroud (7), housing stop (8), an axially, resiliently displaceable fixing element (9) forming a stator stop (10) facing in a same direction as the housing stop (8), and a locking element.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: May 13, 2008
    Assignee: Hilti Aktiengesellschaft
    Inventors: Helmut Burger, Hansjoerg Schwarz, Peter Schmiddunser, Ernst-Rudolf Luebkert
  • Publication number: 20070114051
    Abstract: A hand-held power tool includes a main housing (10) in which a drive motor (12) located, a handle housing (6) connected with the main housing (10) with a possibility of a limited displacement relative thereto in at least one spatial direction (H), a motor switch (16) provided on the handle housing (6), and a cabling (14) for electrically connecting the motor switch with the drive motor (12) and surrounded by protective sheathing (38).
    Type: Application
    Filed: November 17, 2006
    Publication date: May 24, 2007
    Inventors: Manfred Ege, Kay Paszehr, Ernst-Rudolf Luebkert
  • Publication number: 20070044984
    Abstract: A hand-held power tool having a main housing (4) in which a tool spindle (10) is at least partially located, and a handle housing (16) on which a handle (18) is formed, includes a connection device (28) for securing the handle housing (16) to the main housing (16) and having a first connection element (50) with a first engagement member (58) loosely engageable with a second engagement member (52) associated with the main housing (4), and a second connection element (48) with a handle-side locking element, a main housing side locking element, and a further locking element for formlockingly connecting the handle-side locking element and the main housing side locking element, whereby absence of loose engagement of the first and second engagement members is ensured upon formation of the formlocking connection of the handle-side and main housing side locking elements.
    Type: Application
    Filed: August 10, 2006
    Publication date: March 1, 2007
    Inventors: Axel Fischer, Ernst-Rudolf Luebkert, Pierre Pallmer
  • Publication number: 20070034397
    Abstract: A hand-held power tool (2) includes a main housing (4) in which a tool spindle (10) extending in the horizontal direction (Z) is at least partially received in the main housing (4), a handle housing (16), and intermediate lateral vibration-reducing element (40a; 56a) for supporting the handle housing (16) on the main housing (4) in a lateral direction (X), horizontal vibration-reducing element (40c, 56c) for supporting the handle housing (16) on the main housing (4) in the horizontal direction (Z), and a vertical vibration-reducing element (40b, 56c) for supporting the handle housing (16) on the main housing (4) in a vertical direction (Y).
    Type: Application
    Filed: August 10, 2006
    Publication date: February 15, 2007
    Inventors: Axel Fischer, Ernst-Rudolf Luebkert, Pierre Pallmer
  • Patent number: 6933632
    Abstract: A turning-pivoting commutating rotary switch (1) with brush guides (2) for reversing the direction of rotation of a universal motor, which has two stator contacts (3a, 3b) each making contact with a contact rail (5a, 5b) running partially peripherally at at least one contact point (4a, 4b, 4c), which are conducting connected with the two diametrically opposing brush guides (2), wherein a contact rail (5a) with two contact points (4a, 4b) extends over at least a half periphery and wherein both stator contacts (4a, 3b), at which at least one contact point (4a, 4b, 4c) can be rotatably switchable at a contact rail (5a, 5b) running partially peripherally, are arranged on only one side of the stator (6).
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: August 23, 2005
    Assignee: Hilti Aktiengesellschaft
    Inventors: Georg Braml, Ernst-Rudolf Lübkert