Patents by Inventor Joao Bergner

Joao Bergner 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: 7223165
    Abstract: An abrasive pad for a manual grinding machine, in particular for an eccentric grinder, has a flat contact surface (13) on which an abrasive sheet is placed, and attachment means located on the contact surface (13) for creating an adhesive connection with the abrasive sheet. To reduce the production costs of the abrasive pad, it is made entirely—including the attachment means—of plastic using a single-component injection molding procedure, whereby the attachment means are designed preferably as hook-type fasteners (18) which extend out of the contact surface (13) (FIG. 1).
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: May 29, 2007
    Assignee: Robert Bosch GmbH
    Inventors: Steffen Wuensch, Joao Bergner
  • Publication number: 20050124275
    Abstract: An abrasive pad for a manual grinding machine, in particular for an eccentric grinder, has a flat contact surface (13) on which an abrasive sheet is placed, and attachment means located on the contact surface (13) for creating an adhesive connection with the abrasive sheet. To reduce the production costs of the abrasive pad, it is made entirely—including the attachment means—of plastic using a single-component injection molding procedure, whereby the attachment means are designed preferably as hook-type fasteners (18) which extend out of the contact surface (13) (FIG. 1).
    Type: Application
    Filed: December 2, 2004
    Publication date: June 9, 2005
    Inventors: Steffen Wuensch, Joao Bergner
  • Patent number: 6857949
    Abstract: An electrical power grinder, in particular an eccentric grinder, is disclosed that has a grinding wheel (14) and a grinding-medium holder (23), held on the underside thereof, of soft material. For the sake of reducing wear of the grinding-medium holder (23) at its outer edge and lengthening the service life of the grinding-medium holder, the grinding wheel (14) is provided with an edge guard, which has a guard member (30) encompassing the grinding wheel (14) that protrudes, in the plane of the grinding wheel, past the outer contour of the grinding-medium holder (23) (FIG. 3).
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: February 22, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Doris Reich, Steffen Wuensch, Joao Bergner
  • Patent number: 6755597
    Abstract: The invention relates to an electric power tool with a housing, in which a drive mechanism is received; the electric power tool includes a shaft, with a chuck (20) received in it, for receiving a tool insert (19). The chuck (20) is surrounded by an annular bearing face (9). The bearing face (8, 9) includes receiving elements that enable the guidance of the electric power tool on a guide rail (1, 35), such as receptacles (21, 22; 31, 32) and (33) for slip-on tools (25), such as templates, that can be received on the support (8, 9).
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: June 29, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Joao Bergner, Uwe Engelfried, Martin Noack, Klaus Baumgartner
  • Patent number: 6699112
    Abstract: In a grinding body (1) for an electric grinding tool, in particular a delta, eccentric or oscillation grinder, having a carrier plate (2), on which a granular abrasive (3) is disposed and which can be connected to a base plate of the grinding tool, a markedly higher material-removal capacity and a markedly longer service life are attained by providing that the carrier plate (2) comprises a steel band (12), in particular a stainless-steel spring band, and the granular abrasive (3) is a hard-metal granular abrasive (11).
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: March 2, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Joao Bergner, Roland Senn, Marco Brancato
  • Patent number: 6622762
    Abstract: The invention relates to an electric hand tool (6) with an electric motor contained in a housing, which drives a chip-removing tool (8). The mounting section (14) of a mounting rail (1) is mounted in a detent locking fashion onto the mounting base (3) of the electric hand tool (6). A carriage-shaped component equipped with a compass point (12) is mounted onto this mounting rail (1) and/or a parallel fence (9, 10) can be adjustably positioned on it.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: September 23, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Joao Bergner, Uwe Engelfried, Martin Noack
  • Publication number: 20030148719
    Abstract: An electrical power grinder, in particular an eccentric grinder, is disclosed that has a grinding wheel (14) and a grinding-medium holder (23), held on the underside thereof, of soft material. For the sake of reducing wear of the grinding-medium holder (23) at its outer edge and lengthening the service life of the grinding-medium holder, the grinding wheel (14) is provided with an edge guard, which has a guard member (30) encompassing the grinding wheel (14) that protrudes, in the plane of the grinding wheel, past the outer contour of the grinding-medium holder (23) (FIG. 3).
    Type: Application
    Filed: January 13, 2003
    Publication date: August 7, 2003
    Inventors: Doris Reich, Steffen Wuensch, Joao Bergner
  • Publication number: 20030000599
    Abstract: The invention relates to an electric hand tool (6) with an electric motor contained in a housing, which drives a chip-removing tool (8). The mounting section (14) of a mounting rail (1) is mounted in a detent locking fashion onto the mounting base (3) of the electric hand tool (6). A carriage-shaped component equipped with a compass point (12) is mounted onto this mounting rail (1) and/or a parallel fence (9, 10) can be adjustably positioned on it.
    Type: Application
    Filed: May 20, 2002
    Publication date: January 2, 2003
    Inventors: Joao Bergner, Uwe Engelfried, Martin Noack
  • Publication number: 20020187014
    Abstract: The invention relates to an electric power tool with a housing, in which a drive mechanism is received; the electric power tool includes a shaft, with a chuck (20) received in it, for receiving a tool insert (19). The chuck (20) is surrounded by an annular bearing face (9). The bearing face (8, 9) includes receiving elements that enable the guidance of the electric power tool on a guide rail (1, 35), such as receptacles (21, 22; 31, 32) and (33) for slip-on tools (25), such as templates, that can be received on the support (8, 9).
    Type: Application
    Filed: May 1, 2002
    Publication date: December 12, 2002
    Inventors: Joao Bergner, Uwe Engelfried, Martin Noack
  • Publication number: 20020155799
    Abstract: In a grinding body (1) for an electric grinding tool, in particular a delta, eccentric or oscillation grinder, having a carrier plate (2), on which a granular abrasive (3) is disposed and which can be connected to a base plate of the grinding tool, a markedly higher material-removal capacity and a markedly longer service life are attained by providing that the carrier plate (2) comprises a steel band (12), in particular a stainless-steel spring band, and the granular abrasive (3) is a hard-metal granular abrasive (11).
    Type: Application
    Filed: May 6, 2002
    Publication date: October 24, 2002
    Inventors: Joao Bergner, Roland Senn, Marco Brancato
  • Patent number: 6004194
    Abstract: In a hand-held electrical grinder with a tool holder (22) driven by a rotating eccentric plug (20) which, for receiving a grinding tool has a quick-action locking device (24) with locking elements (40, 41) fixed on the tool and tool holder sides and corresponding with each other, the locking elements (40) on the tool side are formed, on the one hand, by hooks (42) disposed on a circular line and, on the other hand, the locking elements (41) on the holder side are realized by means of a spring wire (43), which is bent in the shape of a ring, in order to transmit a greater output from the tool holder (22) to the (10). The spring wire (43) has a number of radially inward directed indentations (431) corresponding to the number of the hooks (42) on the tool side, which extend behind the hooks (42) on the tool side for locking the grinding tool (10) in.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: December 21, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Eugen Hild, Joao Bergner, Rudolf Fuchs
  • Patent number: 5967886
    Abstract: A hand power tool for flat machining has a machine housing, a motor accommodated in the machine housing, a toolholder mounted on the housing, a moveable tool carried by the toolholder and formed as a grinding plate with a triangular base surface for receiving a triangular grinding disk, the toolholder having a substantially triangular base surface substantially corresponding to the base surface of the grinding plate, the toolholder having a region against which the grinding plate is supported and on which the grinding plate is mounted on the toolholder so as to be locked on the toolholder and to be removable from the toolholder without an auxiliary tool.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: October 19, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Steffen Wuensch, Joao Bergner
  • Patent number: 5888128
    Abstract: A hand grinder, comprising a housing, a motor arranged in the housing, a tool holder with a grinding tool received in the tool holder, a work shaft driven by the motor, two rotary bearings which support the work shaft, a compensating unit arranged on the work shaft for joint rotation therewith between the rotary bearings and provided for compensation of an imbalance produced by the tool holder with the grinding tool during rotation of the work shaft, the compensating unit including different imbalance masses which are offset from one another in an axial direction of the work shaft and are arranged on the work shaft diametrically opposite to one another.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: March 30, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Justus Lamprecht, Joao Bergner
  • Patent number: 5855504
    Abstract: In a hand-held orbital sander with a housing (12) and with a sanding tool (10) received in a tool holder (22), which is seated by means of a pivot bearing (21) on a rotating eccentric journal (20) protruding from the housing (12), an oscillating device (23), having an inner ring (26), an outer ring (27) and a formed part (28) made of elastic material connecting the two with each other is provided as a security against relative rotation, wherein the inner ring (26) is fastened on the tool holder (22) coaxially with the pivot bearing (21), and the outer ring (27) is maintained, fixed against relative totation, in the housing (12). The oscillating device (23) provides a symmetrical force distribution and makes it possible to set the torque of the tool holder (22) with the sanding tool (10) as needed in respect to the hardness or thickness of the elastic formed part (28) (FIG. 1).
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: January 5, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Eugen Hild, Joao Bergner
  • Patent number: 5709595
    Abstract: A power tool for surface treatment comprises a housing, a motor accommodated in the housing, a tool holder, a tool supported in the tool holder and driveable by the motor, the tool having a substantially triangular base surface for receiving a substantially triangular grinding sheet, the tool holder being shell-shaped and having a substantially triangular contour substantially corresponding to the base surface of the tool, and also having an outer edge abutting on the tool.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: January 20, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Joao Bergner, Steffen Wuensch
  • Patent number: 5626510
    Abstract: A power tool for surface treatment comprises a housing, a motor accommodated in the housing, a tool holder, a tool supported in the tool holder and driveable by the motor, the tool having a substantially triangular base surface for receiving a substantially triangular grinding sheet, the tool holder being shell-shaped and having a substantially triangular contour substantially corresponding to the base surface of the tool, and also having an outer edge abutting on the tool.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: May 6, 1997
    Assignee: Robert Bosch GmbH
    Inventors: Joao Bergner, Steffen Wuensch
  • Patent number: 5335455
    Abstract: The oscillating grinder includes a housing; a drive motor having a rotatably driven armature shaft and mounted in the housing; a grinder plate connected with the housing by one or more supporting members each having a long side; an eccentric element mounted eccentrically on the armature shaft for converting a rotary motion of the motor into a linear motion of the grinder plate; and a transmission element having a long side and connecting the eccentric element to the grinder plate. The transmission element and the supporting members have different angular moments of inertia in different directions so that a displacement of the eccentric element in one direction, advantageously in the handle direction, is completely transmitted to the grinder plate, but a displacement in another direction transverse to the first direction is no more than incompletely, and preferably not at all, transmitted to the grinder plate, thus providing a linear grinding motion.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: August 9, 1994
    Assignee: Robert Bosch GmbH
    Inventor: Joao Bergner