Patents by Inventor Herbert Vollert

Herbert Vollert 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: 6957723
    Abstract: The invention relates to an electromechanical brake with self-boosting by means of a wedge mechanism. An actuating force is exerted on the friction brake lining via toothing sets that mesh with one another. By means of an engagement angle of the toothing sets, a favorable force introduction angle of the actuating force on the friction brake lining can be attained. In addition, by using a nonround gear wheel and/or a non-straight rack as the toothing sets, flaring of a caliper upon braking and an infeeding motion of the friction brake lining transversely to a brake disk can be compensated for.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: October 25, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
  • Patent number: 6926126
    Abstract: The invention relates to an electromechanical disk brake (10). To attain brake boosting, the invention proposes embodying the disk brake (10) with a multiple brake cylinder (24), which is displaceable in a secant direction of a brake disk (20), and which has both a friction brake lining piston (22), which is displaceable transversely to the brake disk (20), and two brake booster pistons (26), disposed facing one another, which are displaceable parallel to the brake disk (20), and which are braced on fixed abutments (36), for instance on an inside of a brake caliper (12) of the disk brake (10). For actuation of the disk brake (10), the multiple brake cylinder (24) is displaced in the direction of rotation (46) of the brake disk (20), and as a result, the brake booster piston (26) that is at the front in the displacement direction moves into the brake cylinder (26) and, via the friction brake lining piston (22), presses the friction brake lining (18) against the brake disk (20).
    Type: Grant
    Filed: January 19, 2002
    Date of Patent: August 9, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Dietmar Baumann, Herbert Vollert, Hanniel Schmidt, Frieder Keller
  • Publication number: 20050139436
    Abstract: A self-boosting, electromechanical friction brake having with a fixed, drumlike brake body in which two rotatable brake rings are disposed, which are rotatable counter to one another via a planetary gear and can be spread apart thereby. As a result of being spread apart, the brake rings are pressed from inside against the brake body and are braked. The friction brake may be sealed off and thus protected it against environmental factors. A lubricant filling is possible, which reduces wear and as a result makes a lifetime brake possible. The brake may be cooled through coolant channels which can be connected via connections to a coolant circulation system of an internal combustion engine of a motor vehicle.
    Type: Application
    Filed: December 15, 2004
    Publication date: June 30, 2005
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik, Bernd Goetzelmann
  • Patent number: 6904987
    Abstract: An electric drive for an electric or hybrid vehicle has an electric motor, with which a vehicle wheel is drivable, for instance via an articulated shaft. The the electric drive is embodied additionally with a mechanically actuatable wheel brake, which is actuatable by the electric motor selectively for driving the vehicle wheel via a shiftable distributor gear. The invention has the advantage that the electric motor provided for driving the vehicle wheel is simultaneously used for actuating the wheel brake (24) as well.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: June 14, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Hardy Haas, Ian Faye, Herbert Vollert
  • Publication number: 20050121267
    Abstract: The invention relates to a wheel brake for a motor vehicle including an electromechanical actuating device and a hydraulic actuating device, which are redundant. In this way, the likelihood of failure of the wheel brake is reduced. A self-boosting device increases a braking force of the wheel brake, so that an (underpressure) brake booster can be dispensed with. Wheel slip control is possible in a simple way by hydraulic actuation of the wheel brake and superposition of a braking force regulation on the electromechanical actuating device.
    Type: Application
    Filed: October 12, 2004
    Publication date: June 9, 2005
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik, Bernd Goetzelmann
  • Publication number: 20050109566
    Abstract: The invention relates to a self-boosting electromechanical disk brake with a frame caliper equipped with a wear readjustment device which for instance is automatic and which upon tensing of the disk brake stores energy by prestressing a torsion shaft, which upon release of the disk brake converts this energy into a wear readjustment motion. In the process, a spacing between two brake lining holders of the frame caliper in the disk brake is decreased.
    Type: Application
    Filed: October 13, 2004
    Publication date: May 26, 2005
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik, Bernd Goetzelmann
  • Publication number: 20050109567
    Abstract: The invention relates to an electromechanical friction brake having an electromechanical actuating device including an electric motor and a toothed gear assembly with which a friction brake lining can be pressed against a brake body for braking. Gear wheels of the assembly have sets of helical teeth braced with rotary bearings against the resultant axial forces. Sets of helical teeth have the advantage of better synchronism and of being capable of transmitting greater torque. Moreover, if the friction brake is used as a parking brake, an axial force effected by the set of helical teeth prevents occurrences of microscopic slippage in a locking device with a clamping action and thus prevents unintended automatic release of the locking device.
    Type: Application
    Filed: October 22, 2004
    Publication date: May 26, 2005
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik, Bernd Goetzelmann
  • Publication number: 20050098396
    Abstract: The invention relates to a friction brake (10) for a motor vehicle. The friction brake (10) for instance has a disk brake (12), which is actuatable by means of an actuating device, for instance in the form of a ball thread drive (22). The invention proposes embodying the friction brake (10) with a band brake (34), whose band (36) is mounted on the circumference of a nut (26) of the ball thread drive (22). If the brake band (36) is put under tensile stress in order to actuate the band brake (34), then the brake band (36) rotates the nut (26) of the ball thread drive (22) in a tensing direction and in this way actuates the disk brake (12). The invention has the advantage that the friction brake (10) has high brake boosting and therefore requires only little actuating energy. It is accordingly suitable for embodiment as an electromechanical friction brake (10) with an electric motor (56) for its actuation.
    Type: Application
    Filed: July 20, 2001
    Publication date: May 12, 2005
    Inventors: Dietmar Baumann, Hanniel Schmidt, Herbert Vollert, Frieder Keller
  • Patent number: 6845853
    Abstract: A wheel brake device, which in particular is actuatable electromechanically, for a motor vehicle, includes a pivotable lever, one end of which is engaged by an energy-storing spring element and which with its other end presses against a wheel brake lining. The lever is pivotably supported by a support means that is displaceable in the longitudinal direction of the lever. By displacement of the support means in the longitudinal direction of the lever, a lever arm with which the energy-storing spring element engages the lever lengthens, and a lever arm with which the lever presses against the wheel brake lining shortens. A pressure force with which the energy-storing spring element, via the lever, presses the wheel brake lining against a brake disk can be adjusted by displacement of the support means.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: January 25, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Dietmar Baumann, Hanniel Schmidt, Herbert Vollert, Frieder Keller
  • Publication number: 20040262994
    Abstract: A method and a device for monitoring and controlling the braking system of a vehicle. In this context, for the monitoring, at least one braking variable representing the retarding force of at least one wheel brake is recorded, and is compared to a predefined threshold value. As a function of the comparison and of the driving situation of the vehicle and/or the operating state, at least one vehicle component located in the vehicle carries out at least one suitable measure during a braking procedure which modifies the slowdown at at least one wheel brake. In this context, it is observed that the overall slowdown of the vehicle should be held constant during the modification of the slowdown at the at least one wheel brake, or in any event, should be changed insignificantly.
    Type: Application
    Filed: April 9, 2004
    Publication date: December 30, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Rolf Maier-Landgrebe, Andreas Henke, Bertram Foitzik
  • Publication number: 20040262101
    Abstract: An electromechanically actuatable disk brake with a self-boosting device includes a wear readjusting device which can for instance be adjusted by means of an electric motor as an actuator, to compensate for wear of a restoring device.
    Type: Application
    Filed: June 23, 2004
    Publication date: December 30, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
  • Publication number: 20040262098
    Abstract: An electromechanically actuated disk brake with mechanical self-boosting includes an automatic wear readjusting device, which can for instance have a positive-engagement detent device. An increased air clearance caused by wear of friction brake linings is prevented by the invention, which thus also prevents an increase in the displacement of the friction brake lining in the direction of rotation of the brake disk when the disk brake is actuated in order to attain the self-boosting.
    Type: Application
    Filed: June 23, 2004
    Publication date: December 30, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
  • Publication number: 20040245056
    Abstract: The invention relates to an electromechanically actuatable disk brake (10). To attain brake reinforcement, the invention proposes that a friction brake lining (40) be guided displaceably with a guide (44, 50) whose angle to the brake disk (14) is adjustable. A frictional force exerted by the rotating brake disk (14) on the friction brake lining (40) pressed against it causes a force component in the direction of the guide (44, 50), which when the guide (44, 50) is positioned obliquely creates a pressure force of the friction brake lining (40) against the brake disk (14) and thus a brake reinforcement.
    Type: Application
    Filed: July 16, 2004
    Publication date: December 9, 2004
    Inventors: Dietmar Baumann, Hanniel Schmidt, Herbert Vollert, Frieder Keller
  • Publication number: 20040238294
    Abstract: A disk brake having a first friction brake lining, which for braking can be pressed against a brake disk by pivoting of a support lever. A brake caliper is embodied as a floating caliper and an adjusting device is provided with which a second friction brake lining is adjustable transversely to the brake disk. In this way, a support angle (&agr;) and thus a magnitude of the self-boosting of the disk brake can be varied.
    Type: Application
    Filed: May 26, 2004
    Publication date: December 2, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik, Bernd Goetzelmann
  • Publication number: 20040187591
    Abstract: A sensor arrangement for detecting mechanical forces (F) with at least one magnetic-field-dependent sensor element, in which the output signal of the sensor element depends on the deflection of a mechanical component in the magnetic field in response to the exertion of force. The mechanical component here is a spring, which changes its location in the magnetic field in response to the exertion of force and is a component of a brake system for a motor vehicle; the at least one sensor element being located in the force flow of the brake caliper.
    Type: Application
    Filed: March 1, 2004
    Publication date: September 30, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
  • Publication number: 20040154881
    Abstract: An electromechanical disk brake with mechanical self-boosting for instance by means of a ramp mechanism, which is intended for use in motor vehicles in which the ramp mechanism is braced in a circumferential direction relative to a brake disk on a brake bracket, in order thereby to keep a caliper guide of a floating caliper free of frictional and braking forces of the disk brake.
    Type: Application
    Filed: January 12, 2004
    Publication date: August 12, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
  • Publication number: 20040134723
    Abstract: The invention relates to an electromechanical brake with self-boosting by means of a wedge mechanism. An actuating force is exerted on the friction brake lining via toothing sets that mesh with one another. By means of an engagement angle of the toothing sets, a favorable force introduction angle of the actuating force on the friction brake lining can be attained. In addition, by using a nonround gear wheel and/or a non-straight rack as the toothing sets, flaring of a caliper upon braking and an infeeding motion of the friction brake lining transversely to a brake disk can be compensated for.
    Type: Application
    Filed: December 29, 2003
    Publication date: July 15, 2004
    Inventors: Dietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
  • Publication number: 20040112693
    Abstract: The invention relates to an electromechanical disk brake (10). To attain brake boosting, the invention proposes embodying the disk brake (10) with a multiple brake cylinder (24), which is displaceable in a secant direction of a brake disk (20), and which has both a friction brake lining piston (22), which is displaceable transversely to the brake disk (20), and two brake booster pistons (26), disposed facing one another, which are displaceable parallel to the brake disk (20), and which are braced on fixed abutments (36), for instance on an inside of a brake caliper (12) of the disk brake (10). For actuation of the disk brake (10), the multiple brake cylinder (24) is displaced in the direction of rotation (46) of the brake disk (20), and as a result, the brake booster piston (26) that is at the front in the displacement direction moves into the brake cylinder (26) and, via the friction brake lining piston (22), presses the friction brake lining (18) against the brake disk (20).
    Type: Application
    Filed: January 26, 2004
    Publication date: June 17, 2004
    Inventors: Dietmar Baumann, Herbert Vollert, Hanniel Schmidt, Frieder Keller
  • Publication number: 20040026184
    Abstract: The invention relates to a wheel brake device (10), which in particular is actuatable electromechanically, for a motor vehicle. The invention proposes embodying the wheel brake device (10) with a pivotable lever (22), one end of which is engaged by an energy-storing spring element (26) and which with its other end presses against a wheel brake lining (18). According to the invention, the lever (22) is pivotably supported by a support means (32, 34) that is displaceable in the longitudinal direction of the lever. By displacement of the support means (32, 34) in the longitudinal direction of the lever (22), a lever arm with which the energy-storing spring element (26) engages the lever (22) lengthens, and a lever arm with which the lever (22) presses against the wheel brake lining (18) shortens. By displacement of the support means (32, 34), a pressure force with which the energy-storing spring element (26), via the lever (22), presses the wheel brake lining (18) against a brake disk (14) can be adjusted.
    Type: Application
    Filed: August 27, 2003
    Publication date: February 12, 2004
    Inventors: Dietmar Baumann, Hanniel Schmidt, Herbert Vollert, Frieder Keller
  • Publication number: 20030178270
    Abstract: The improved drum brake includes an anchor plate, a drum, and a drum ring and brake shoes, which cooperate with the drum and are disposed in a drum chamber between the anchor plate and the drum, and ventilation openings on the drum.
    Type: Application
    Filed: February 25, 2003
    Publication date: September 25, 2003
    Inventors: Herbert Vollert, Willi Nagel, Bertram Foitzik, Rolf Knecht