Patents by Inventor Daniel L. Krajnik

Daniel L. Krajnik 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).

  • Crane backstay spreader
    Patent number: 8127949
    Abstract: A backstay spreader attachable between a pair of backstay sections on a crane includes first and second members each having a backstay section connector at a first end and a pivoting joint connector at a second end, the pivoting joint connectors being used to hold the first and second members together with a pivotal connection and each having an extending portion extending away from the pivotal connection, with an angle between the extending portions. The backstay spreader also includes an actuator mounted between the pivoting joint connectors. The actuator controls the angle between the extending portions of the two pivoting joint connectors, which defines an angle between the first and second members.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: March 6, 2012
    Assignee: Manitowoc Crane Companies, LLC
    Inventors: Robert J. Walker, Daniel L. Krajnik
  • Crane Backstay Spreader
    Publication number: 20100294735
    Abstract: A backstay spreader attachable between a pair of backstay sections on a crane includes first and second members each having a backstay section connector at a first end and a pivoting joint connector at a second end, the pivoting joint connectors being used to hold the first and second members together with a pivotal connection and each having an extending portion extending away from the pivotal connection, with an angle between the extending portions. The backstay spreader also includes an actuator mounted between the pivoting joint connectors. The actuator controls the angle between the extending portions of the two pivoting joint connectors, which defines an angle between the first and second members.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 25, 2010
    Inventors: Robert J. Walker, Daniel L. Krajnik
  • Offsetting link assembly for folding luffing jib
    Patent number: 5842587
    Abstract: A crane boom and luffing jib assembly have an offsetting link to allow the luffing jib to fold back and under the main boom for assembly of the boom and luffing jib assembly on a construction site where the entire length of the boom and luffing jib cannot be laid out during assembly.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: December 1, 1998
    Assignee: Manitowoc Crane Group, Inc.
    Inventors: Michael J. Wanek, Robert J. Walker, Daniel L. Krajnik