Patents by Inventor Walter L. Steffens

Walter L. Steffens 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: 5746305
    Abstract: A slat sorter having a series of platens slidably mounted on an array of slats driven by an endless chain with each platen having a diverter pin for enabling it to be diverted between a straight-through track and at least one divert track. A switch having an elongated arm having a pivot end and a tip opposite and upstream the pivot end which is urged by a prime mover, that preferably is a limited angle torque electric motor, between a straight-through position directing a diverter pin to travel along the straight-through track and a divert position directing the diverter pin to travel along the divert track. The arm has a cutout which allows the arm to be urged from one position to the another position before the diverter pin is completely downstream and cleared of the arm. Operably associated with the arm is a brake for enabling the arm to be urged toward either the straight-through or divert position by an oncoming divert pin to prevent the divert pin from colliding head-on with the arm.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: May 5, 1998
    Assignee: HK Systems, Inc.
    Inventors: John J. Wilkins, Walter L. Steffens
  • Patent number: 5595279
    Abstract: A sortation conveyor includes elongated slats, of rectangular configuration, travelling in pairs along an endless path. The conveyor is characterized by unique diverters, and mounting assemblies therefor. The diverters are formed of a durable plastic, with an additive for lubricity. The additional lubricity allows the bearing surfaces of the diverter to slide laterally along the adjacent pair of slats, with reduced friction. A metal I-beam insert strengthens the web of the diverter, while reducing the thickness thereof; the reduced thickness allows the web of the diverter to pass easily between adjacent pairs of slats. The diverter pin has flat sides, in horizontal cross-section, for cooperation with pin guides and switches. Two urethane blocks fill the hollow shell at the upper end of the diverter, and the protruding edges of the blocks are angled to impart a downward force to a package striking same.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 21, 1997
    Assignee: Western Atlas Inc.
    Inventors: John J. Wilkins, Walter L. Steffens, Timothy A. Koeninger, Martin A. Heit
  • Patent number: 5590758
    Abstract: A slat sorter includes a plurality of platens each supported by two slats. The slats are driven by hollow pin chain and are fastened to the chain by a ball detent pin which passes through the hollow pin of the chain into the slat end. The head of each ball detent pin acts as a bearing surface against a wear strip which confines lateral motion of the slats. The divert switches in the sorter use a switch arm driven by a motor. The arm is configured to allow rapid switching and a brake on the motor prevents rotation of the motor in the event of power failure to prevent the arm from drifting into an intermediate, potential crash, position.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 7, 1997
    Assignee: Western Atlas Inc.
    Inventors: John J. Wilkins, Walter L. Steffens