Patents by Inventor Volkmar Prehn

Volkmar Prehn 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: 10309134
    Abstract: A closure for a toggle clamp for an industrial truck, wherein the closure has a holding part, a holding axle mounted to the holding part, a closure part, wherein the closure part has an anchoring element, a closing lever, a boundary axle mounted to the anchoring element, a closing lever pivotably mounted to the closing lever axle, a latch axle mounted to the closing lever, a latch mounted to the closing lever axle, the boundary axle, pivotably mounted to the latch axle, and the latch nose configured to engage the holding axle, a first spring element attached to the closing lever axle, and a second spring element attached to the latch axle, and a pivot axle configured to be attached to the industrial truck.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: June 4, 2019
    Assignee: Jungheinrich Aktiengesellschaft
    Inventor: Volkmar Prehn
  • Publication number: 20160215535
    Abstract: A closure for a toggle clamp for an industrial truck, wherein the closure has a holding part, a holding axle mounted to the holding part, a closure part, wherein the closure part has an anchoring element, a closing lever, a boundary axle mounted to the anchoring element, a closing lever pivotably mounted to the closing lever axle, a latch axle mounted to the closing lever, a latch mounted to the closing lever axle, the boundary axle, pivotably mounted to the latch axle, and the latch nose configured to engage the holding axle, a first spring element attached to the closing lever axle, and a second spring element attached to the latch axle, and a pivot axle configured to be attached to the industrial truck.
    Type: Application
    Filed: January 28, 2016
    Publication date: July 28, 2016
    Inventor: Volkmar Prehn
  • Patent number: 7963349
    Abstract: A drive and steering equipment for a floor conveyor, with a drive unit which has a driving motor, a gear and a driving wheel and which is mounted in a bearing around vertical axis in a vehicle-fixed frame of the floor conveyor, a steering motor which pivots the drive unit around the vertical axis, and a control arm, an angle sensor and a steering control equipment, which adjusts a steering angle of the driving wheel through the steering motor in accordance to the signal of the angle sensor, characterised in that the control arm is rotatably mounted in a bearing coaxially or axially parallel to the drive unit via a bearing component part, the angle sensor is attached on the bearing component part and measures the relative angle between the drive unit and the bearing component part and the steering control equipment adjusts the drive unit via the steering motor such that the relative angle becomes zero.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: June 21, 2011
    Assignee: Jungheinrich Aktiengesellschaft
    Inventor: Volkmar Prehn
  • Patent number: 7383915
    Abstract: A drawbar for power-operated industrial trucks with a drawbar handle which can be pivoted about a horizontal axis in a large angular range between an approximately upright position and a position inclined obliquely to vertical. The drawbar includes a drawbar head arranged at a free end of the drawbar handle, the head including a horn arranged in the extension of the drawbar handle, rod-like grips extending on both sides of the horn and approximately transversely thereto that are connected to carrier sections connected to the horn on both sides via arm sections attached to the end of a grip. The arm and carrier sections form a protective yoke with grip openings and at least one control element for a function of the industrial truck on one grip opening is arranged in the vicinity of the associated carrier section, such that it can be actuated from above by pressure from one finger, even when the hand grasps the rod-like grip facing it.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: June 10, 2008
    Assignee: Jungheinrich Aktiengesellschaft
    Inventors: Bernd David, Helmut Lohmann, Michael Niebuhr, Volkmar Prehn
  • Publication number: 20070095594
    Abstract: A drive and steering equipment for a floor conveyor, with a drive unit which has a driving motor, a gear and a driving wheel and which is mounted in a bearing around vertical axis in a vehicle-fixed frame of the floor conveyor, a steering motor which pivots the drive unit around the vertical axis, and a control arm, an angle sensor and a steering control equipment, which adjusts a steering angle of the driving wheel through the steering motor in accordance to the signal of the angle sensor, characterised in that the control arm is rotatably mounted in a bearing coaxially or axially parallel to the drive unit by means of a bearing component part, the angle sensor is attached on the bearing component part and measures the relative angle between the drive unit and the bearing component part and the steering control equipment adjusts the drive unit via the steering motor such that the relative angle becomes zero.
    Type: Application
    Filed: September 28, 2006
    Publication date: May 3, 2007
    Applicant: Jungheinrich Aktiengesellschaft
    Inventor: Volkmar Prehn
  • Publication number: 20050098375
    Abstract: A drawbar for power-operated industrial trucks with a drawbar handle which can be pivoted about a horizontal axis in a large angular range between an approximately upright position and a position inclined obliquely to vertical. The drawbar includes a drawbar head arranged at a free end of the drawbar handle, the head including a horn arranged in the extension of the drawbar handle, rod-like grips extending on both sides of the horn and approximately transversely thereto that are connected to carrier sections connected to the horn on both sides via arm sections attached to the end of a grip. The arm and carrier sections form a protective yoke with grip openings and at least one control element for a function of the industrial truck on one grip opening is arranged in the vicinity of the associated carrier section, such that it can be actuated from above by pressure from one finger, even when the hand grasps the rod-like grip facing it.
    Type: Application
    Filed: October 20, 2004
    Publication date: May 12, 2005
    Applicant: Jungheinrich Aktiengesellschaft
    Inventors: Bernd David, Helmut Lohmann, Michael Niebuhr, Volkmar Prehn
  • Patent number: D384478
    Type: Grant
    Filed: March 13, 1996
    Date of Patent: September 30, 1997
    Assignee: Jungheinrich AG
    Inventors: Volkmar Prehn, Kai Hestermann