Patents by Inventor Lennart J. Lindell

Lennart J. Lindell 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: 6571596
    Abstract: A system for automatically producing formed parts from feedstock using two successive adiabatic processing stations, a first station performing adiabatic cut-off of blanks from the feedstock, and the second station performing adiabatic forming of the blanks into the formed parts. The first station operates cooperatively with a feedstock feeder assembly which feeds feedstock to the first station and also charges blanks produced at the first station into a transfer capsule of a transferer assembly. The first and second stations cooperatively operate with the blank transferer assembly which transfers in the transfer capsule blanks from the first to the second station. The second station includes means for positioning blanks relative to a forming cavity before blanks are adiabatically shaped to conform to the forming cavity and also means for ejecting formed parts from tooling that defines the forming cavity. The system includes automation means that synchronizes and sequences subassembly operations.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: June 3, 2003
    Inventor: Lennart J. Lindell
  • Patent number: 4470330
    Abstract: A tooling assembly for use with a mechanical impact press includes a pair of die blocks which effect cutting of rods, bars and tubes by the rapid misalignment of aligned apertured tools. Realignment is achieved by a reciprocable cam which also limits the extent of misalignment. Means are provided for clamping or dragging the end of a workpiece stock upstream from the prospective cutting plane. A wedge shaped recess adjacent to the aperture of the movable tool or die block provides a high degree of uniformity in workpiece length as measured at various points of a given workpiece. Where the workpiece stock is tubular, a floating mandrel is disposed within the workpiece in the upstream tool or die block while a reciprocable mandrel supports, receives, resizes and discharges the tubular workpiece.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: September 11, 1984
    Inventor: Lennart J. Lindell
  • Patent number: 4245493
    Abstract: An impact press includes drive means for reciprocating a sleeve at one end of which a ram is slidably and rotatably carried, the same being normally held in a retracted position by retaining means. The drive means that reciprocates the sleeve toward and away from impact tooling also regulates in synchronization therewith a releasing means by which the retaining means lets go of the ram to permit it to fly under the influence of a bias until it impacts the tooling. Reaction from the tooling after the punching has been completed provides a force for receiving the ram in the sleeve. If desired, the driving means can also be used to regulate the operation of a workpiece feeder, a workpiece brake, and any regulator that the impact tooling may have, all in synchronization with the movements of the sleeve. If a conventional air feeder is used, owing to limitations of the feeder, the device can be operated at 180 strokes per minute.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: January 20, 1981
    Inventor: Lennart J. Lindell