Patents by Inventor Ludwig Thome

Ludwig Thome 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).

  • Publication number: 20070144749
    Abstract: A percussion bolt for a percussion mechanism of a power tool has a bolt element having a contact shoulder, said contact shoulder as seen in circumferential direction having a cross-section which varies.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 28, 2007
    Inventors: Ludwig Thome, Thilo Henke
  • Patent number: 7055620
    Abstract: The invention is based on a hand power tool having an electric motor (12) located in a housing (10), via which an insertable tool (16) situated in a tool mount (14) is capable of being driven in a rotating manner, and having a safety device (18) with which a characteristic value for an occurrence of uncontrolled blockage of the insertable tool (16) can be detected via a sensor unit (20), and the movement of the housing (10) can be decelerated. It is proposed that the safety device (18) is formed at least partially by a motor control unit (22), via which the electric motor (12) can be actively decelerated when an occurrence of uncontrolled blockage of the insertable tool (16) is detected.
    Type: Grant
    Filed: February 9, 2002
    Date of Patent: June 6, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Peter Nadig, Oliver Zirn, Ludwig Thome
  • Publication number: 20030116332
    Abstract: The invention is based on a hand power tool having an electric motor (12) located in a housing (10), via which an insertable tool (16) situated in a tool mount (14) is capable of being driven in a rotating manner, and having a safety device (18) with which a characteristic value for an occurrence of uncontrolled blockage of the insertable tool (16) can be detected via a sensor unit (20), and the movement of the housing (10) can be decelerated.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 26, 2003
    Inventors: Peter Nadig, Oliver Zirn, Ludwig Thome
  • Patent number: 6415875
    Abstract: A hand-held power tool has a machine housing, a drive motor, a tool receptacle, a drive strand accommodated in the machine housing and extending between the drive motor and the tool receptacle, and a detection device for detecting an uncontrolled operational condition of the hand-held power tool, and a blocking device which in case of the uncontrolled operational condition form-lockingly connects the drive strand with the machine housing, the blocking device including at least one locking member which is housing-fixed in a rotary direction of the drive strand and at least one locking member which co-rotates in the drive strand so that the locking member and the blocking member are bringable in engagement with one another, the locking member and the blocking member being bringable in engagement with one another axially in direction of a rotary axis of the blocking member.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: July 9, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Gerhard Meixner, Ludwig Thome, Felix Blank, Georg Hansis, Thomas Klaas
  • Patent number: 5996707
    Abstract: A hand power tool has a machine housing, a drive motor accommodated in the machine housing, a drive train connected with the drive motor and provided with a tool receptacle for rotation of a tool insertable in the tool receptacle, a detecting device for detecting an uncontrolled operation of the hand power tool by detecting a blocking of the tool in a workpiece with a resulting impact-like turning of the machine housing, a blocking device provided for the drive train and releasable by the detecting device, the locking device having a locking toothing arranged in the drive train and a blocking member movably supported in the machine housing and form-lockingly engagable in the locking toothing so as to non-rotatably fix the drive train relative to the machine housing, the detecting device being formed so that it produces an electrical release signal in an uncontrolled operation, the blocking device being releasable by the electrical release signal, and further has electromagnet device actuatable by the release
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: December 7, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Ludwig Thome, Karl Frauhammer, Manfred Hellbach, Gerhard Meixner, Heinz Schnerring, Manfred Klein
  • Patent number: 4751970
    Abstract: An angular attachment to a rotary and percussive power machine, such as a hammer drill, includes a rotary power input tubular member driven by a rotary part of the power machine, a tubular power output supported for rotation at an angle relative to the axis of rotation of the power input member and including a holder for a rotary and percussive work tool. The tubular power input and output members are interconnected by an intermediate power transmission. A device for transmitting impacts from the percussive part of the power machine includes two guiding channels arranged in alignment with central bores of the tubular power input and output members and each enclosing at least one impact deviating element. The impact deviating elements are in sliding engagement with each other and with a corresponding coupling member arranged in respective contact bores of the power input and output members.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: June 21, 1988
    Assignee: Robert Bosch GmbH
    Inventors: Roland Hecker, Helmut Kapfer, Ludwig Thome
  • Patent number: 4395649
    Abstract: An electrically driven linear vibrator has swing drive for vibrating troughs, jarring tables or the like comprises a stator with an exciter winding, an armature guided for linear movement in a direction transverse to the field produced by the stator and a pair of oppositely acting return springs forming together a swing drive, the vibration of which may be used to drive a device connected to the vibrator. The return springs may be constituted by metal springs, gas springs or a combination of both. The swing drive may be constructed as single-acting or double-acting drives. A diode may be connected with the electrical conductors leading to exciter winding so that at a line frequency of 50 Hz, an oscillation frequency of 100 Hz, 50 Hz or 25 Hz may be obtained. The vibrator may also be provided with a piston blower for cooling the windings of the stator.
    Type: Grant
    Filed: March 20, 1979
    Date of Patent: July 26, 1983
    Assignee: Robert Bosch GmbH
    Inventors: Ludwig Thome, Karl Wanner, Karlheinz Bretthauer
  • Patent number: 4310055
    Abstract: A hand-held power tool has a tool holder, a tool axially reciprocable in the tool holder, and a striking mechanism including a drive piston and a striker having a disc-shaped plate with a small axial dimension and a striker shaft having a cross sectional dimension corresponding to that of a tool shaft. The striker shaft transmits impact energy directly to a rear end face of the tool shaft without an intermediate member.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: January 12, 1982
    Assignee: Robert Bosch GmbH
    Inventors: Karl Wanner, Ludwig Thome, Joerg Faelche, Werner Lehmann