Patents by Inventor Donald E. Luebrecht

Donald E. Luebrecht 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: 8454718
    Abstract: A work vehicle is provided comprising: a main frame including an engine compartment; an engine located in the engine compartment; and a cooling system comprising a rotating fan apparatus and a cooling assembly. The cooling assembly may comprise a heat exchanger for transferring energy in the form of heat from a coolant fluid to air and a filter apparatus positioned adjacent an engine-compartment side of the heat exchanger. The air may be moved through the heat exchanger by the fan apparatus. The filter apparatus may filter the air before the air passes through the heat exchanger. The filter apparatus may comprise filter structure and a suction device for removing debris from the filter structure. The suction device preferably expels the debris outside of the engine compartment.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: June 4, 2013
    Assignee: Crown Equipment Corporation
    Inventors: Juergen Buchmann, Dean E. Davis, Derek M. Gamertsfelder, Jason R. Kremer, Donald E. Luebrecht, Joerg Nellen, Nicholas J. Stein
  • Patent number: 7871117
    Abstract: A materials handling vehicle is provided. The vehicle comprises a main body, a seat deck assembly including an operator seat, and structure for movably mounting the seat deck assembly to the main body. The seat deck assembly moves relative to the main body along a varying radius path.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: January 18, 2011
    Assignee: Crown Equipment Corporation
    Inventors: Ryan R. Berger, Michael P. Gallagher, John P. Jones, Thornton K. Lothrop, Donald E. Luebrecht, Rainer B. Teufel, Juergen Buchmann, Edgar Wahnemuehl
  • Publication number: 20100242866
    Abstract: A work vehicle is provided comprising: a main frame including an engine compartment; an engine located in the engine compartment; and a cooling system comprising a rotating fan apparatus and a cooling assembly. The cooling assembly may comprise a heat exchanger for transferring energy in the form of heat from a coolant fluid to air and a filter apparatus positioned adjacent an engine-compartment side of the heat exchanger. The air may be moved through the heat exchanger by the fan apparatus. The filter apparatus may filter the air before the air passes through the heat exchanger. The filter apparatus may comprise filter structure and a suction device for removing debris from the filter structure. The suction device preferably expels the debris outside of the engine compartment.
    Type: Application
    Filed: February 19, 2010
    Publication date: September 30, 2010
    Applicant: CROWN EQUIPMENT CORPORATION
    Inventors: Juergen Buchmann, Dean E. Davis, Derek M. Gamertsfelder, Jason R. Kremer, Donald E. Luebrecht, Joerg Nellen, Nicholas J. Stein
  • Patent number: 6174124
    Abstract: A multi-task capable work assist vehicle is designed for transporting an operator and items to be handled by the operator and for elevating the operator with such items supported upon a load tray elevated with the operator. Preferably the load tray is mounted for positioning along a telescoping mast which supports and elevates the operator. A load deck or load platform is provided on a body of the vehicle in addition to the load tray so that items such as packages, tools, parts, merchandise and the like can be carried by the vehicle. Load shelves may also be provided adjacent the load deck to add flexibility and capacity to the load carrying capability of the vehicle. Uses of the vehicle include order picking, in-house service maintenance, stock management, cargo delivery and the like. It is designed to be compact in size and highly maneuverable for use in narrow storage aisles and tight quarters.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: January 16, 2001
    Assignee: Crown Equipment Corporation
    Inventors: Forrest A. Haverfield, Timothy S. Quellhorst, Donald E. Luebrecht, Kevin A. Gilliland, Michael P. Gallagher, Thomas L. Bidwell, Harold A. Stammen, William J. Heidemann, Paul J. Leasor, Leif A. Norland, Thomas W. Linn, Joe H. Knapschaefer, Rob J. Stauffer, David B. Smith, John McClusky
  • Patent number: 6135694
    Abstract: A fork lift truck includes a body, a drive mechanism supported on the body for effecting movement of the body, and a fork carrying assembly carrying forks which can be moved in height between a lowered position and desired raised positions. A tilt cylinder is provided for tilting the forks through a fork tilt range. The truck further includes a pressure sensor capable of generating signals indicative of the weight of a load on the forks, a fork tilt position sensor capable of being activated when the forks are tilted to extremes of the fork tilt range, and a controller. The controller is coupled to the drive mechanism, the pressure sensor and the fork tilt position sensor.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: October 24, 2000
    Assignee: Crown Equipment Corporation
    Inventors: Allen T. Trego, Daniel C. Magoto, Donald E. Luebrecht
  • Patent number: 6019190
    Abstract: A work assist vehicle includes a self propelled, steerable body having a chassis and a drive mechanism supported on the chassis; a mast assembly coupled to the body; and, a personnel compartment attached to the mast assembly and being movable by the mast assembly toward and away from the body. The body further includes a cover adapted to extend over a portion of the chassis and a weight sensor assembly coupled to the chassis and the cover. The weight sensor assembly is capable of detecting if someone or something is located on the cover.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: February 1, 2000
    Assignee: Crown Equipment Corporation
    Inventors: Donald E. Luebrecht, Kevin A. Gilliland, Matthew P. Ranly, Harold A. Stammen, William J. Heidemann, David B. Smith
  • Patent number: 5992572
    Abstract: A personnel carrying vehicle comprising a self propelled, steerable body, a telescoping mast attached to and extending upwardly from said body, and a personnel compartment attached to the mast and provided with a rail member that extends from the mast and around the sides. A pair of gate members, which are pivotally attached to the rail member and to the floor of the compartment, are movable from a closed position to an open position wherein said gate members extend into the compartment.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: November 30, 1999
    Assignee: Crown Equipment Corporation
    Inventors: Kevin A. Gilliland, Thomas L. Bidwell, Eugene G. Bruns, Bradley A. Burns, Joseph H. Knapschaefer, John F. McClusky, Lief A. Norland, Daniel L. Sherman, David B. Smith, Harold A. Stammen, Robert J. Stauffer, Donald E. Luebrecht, Ronald A. Grisez, William J. Heidemann
  • Patent number: D405581
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: February 9, 1999
    Assignee: Crown Equipment Corporation
    Inventors: Robert J. Henshaw, Michael W. Henderson, Donald E. Luebrecht, Michael P. Gallagher, Edward E. Ahigian, Brent A. Bergman
  • Patent number: D407176
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: March 23, 1999
    Assignee: Crown Equipment Corporation
    Inventors: Robert J. Henshaw, Philip D. Palermo, Steven R. Pulskamp, Donald E. Luebrecht, Michael P. Gallagher, Timothy S. Quellhorst, Allen T. Trego
  • Patent number: D407177
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: March 23, 1999
    Assignee: Crown Equipment Corporation
    Inventors: Robert J. Henshaw, Philip D. Palermo, Steven R. Pulskamp, Donald E. Luebrecht, Michael P. Gallagher, Timothy S. Quellhorst, Allen T. Trego
  • Patent number: D409349
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: May 4, 1999
    Assignee: Crown Equipment Corporation
    Inventors: Thomas Bidwell, Michael P Gallagher, Kevin A. Gilliland, Joseph H Knapschaefer, Donald E Luebrecht, John F McClusky, Leif A Norland, Steven R Pulskamp, Harold A Stammen, Robert J Stauffer, Ronald A Grisez
  • Patent number: D412866
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: August 17, 1999
    Assignee: Crown Equipment Corporation
    Inventors: Thomas Bidwell, Michael P. Gallagher, Kevin A. Gilliland, Joseph H. Knapschaefer, Donald E. Luebrecht, John F. McClusky, Leif A. Norland, Steven R. Pulskamp, Harold A. Stammen, Robert J. Stauffer
  • Patent number: D424777
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: May 9, 2000
    Assignee: Crown Equipment Corporation
    Inventors: Thomas Bidwell, Michael P Gallagher, Kevin A. Gilliland, Joseph H Knapschaefer, Donald E Luebrecht, John F McClusky, Leif A Norland, Steven R Pulskamp, Harold A Stammen, Robert J Stauffer, Ronald A Grisez
  • Patent number: RE44700
    Abstract: A materials handling vehicle is provided. The vehicle comprises a main body, a seat deck assembly including an operator seat, and structure for movably mounting the seat deck assembly to the main body. The seat deck assembly moves relative to the main body along a varying radius path.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: January 14, 2014
    Assignee: Crown Equipment Corporation
    Inventors: Ryan R. Berger, Michael P. Gallagher, John P. Jones, Thornton K. Lothrop, Donald E. Luebrecht, Rainer B. Teufel, Juergen Buchmann, Edgar Wahnemuehl