Patents by Inventor Per E. Lindquist

Per E. Lindquist 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).

  • Vehicle precision location assembly
    Patent number: 4782760
    Abstract: A vehicle precision location assembly including a precision shoe mounted on the vehicle and having planar surfaces which converge towards an end of the shoe and intersect along an edge inclined with respect to the horizontal and a pair of rollers mounted alongside a track and having their axes of rotation canted with respect to each other such that each roller contacts the shoe surfaces along a line substantially parallel to the axis of the roller whereby the vehicle will be centered in a direction transverse to the direction of travel of the vehicle and without any play in the transverse direction regardless of wear.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: November 8, 1988
    Assignee: S I Handling Systems, Inc.
    Inventors: Peter Rohrbach, Per E. Lindquist
  • Driverless vehicle with floating mounted substrate, and precision stop/locator assembly
    Patent number: 4646649
    Abstract: A driverless vehicle, propelled by a longitudinal drive shaft, is provided with a load supporting substrate coupled to the vehicle body by a floating mount which permits the substrate to be moved relative to the body in a limited manner. A precision locator for use with said vehicle orientates the substrate in three directions, namely fore-aft, transversely, and vertically.
    Type: Grant
    Filed: May 15, 1984
    Date of Patent: March 3, 1987
    Assignee: SI Handling Systems, Inc.
    Inventors: James L. Thatcher, Per E. Lindquist
  • Driverless tugger vehicle and system
    Patent number: 4619204
    Abstract: A driverless tugger vehicle is adapted to shuttle back and forth and push or pull another driverless vehicle each time it moves in a forward direction. The tugger vehicle is propelled by frictional contact between a drive wheel and a drive shaft with the drive wheel being mounted for pivotable movement through an arc of approximately 90 degrees so that the vehicle may reciprocate in opposite directions without changing the direction of rotation of the drive shaft.
    Type: Grant
    Filed: December 7, 1983
    Date of Patent: October 28, 1986
    Assignee: SI Handling Systems, Inc.
    Inventor: Per E. Lindquist
  • Driverless tugger vehicle
    Patent number: 4612861
    Abstract: A driverless tugger vehicle adapted to contact another driverless vehicle and push or pull the latter to a source of power includes a body having support wheels for riding on tracks. The body has a drive wheel adapted for frictional contact with a drive shaft. A contact member on the body is provided for pushing or pulling the other driverless vehicle. A switch actuator is provided on the body for initiating reversal of direction of movement of the body when the contact member is coupled to said other driverless vehicle.
    Type: Grant
    Filed: December 7, 1983
    Date of Patent: September 23, 1986
    Assignee: Si Handling Systems, Inc.
    Inventor: Per E. Lindquist
  • Train of driverless vehicles
    Patent number: 4582000
    Abstract: A plurality of driverless vehicles are pivotably connected together to form a train. Each vehicle has a drive wheel connected to the drive wheel on the next adjacent vehicle by a flexible member extending therebetween so that the drive wheel on the second vehicle is a slave to the drive wheel on the first vehicle.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: April 15, 1986
    Assignee: SI Handling Systems, Inc.
    Inventor: Per E. Lindquist