Patents by Inventor Monroe Mulder

Monroe Mulder 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).

  • Dock leveler in which the ramp is raised and lowered using an inflatable member and method of use
    Patent number: 5600859
    Abstract: A dock leveler including a ramp movable between a raised position and a lowered position is moved to its raised position by inflation of an inflatable member, such as an airbag supported beneath the ramp by a support assembly. The support assembly is removably mounted below the ramp at its rearward end, and its forward end is provided with wheels which engage the floor of the pit within which the dockleveler is mounted. A fan is mounted to the support adjacent its rearward end, and includes an outlet communicating through the support with the interior of the airbag. The airbag, support and fan are assembled into a subassembly which is removable as a unit from below the ramp. A lifting tool is employed to raise the forward end of the support assembly, either for cleaning or for use in mounting a pair of auxiliary wheel assemblies to the support assembly.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: February 11, 1997
    Assignee: Kelley Company, Inc.
    Inventors: Charles H. Hodges, Martin P. Hageman, Monroe Mulder