Patents by Inventor Larry Warden

Larry Warden 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).

  • Filter valve system for regulating, filtering, and dispensing a flow of hot melt materials and adhesives
    Patent number: 5683578
    Abstract: An apparatus for controlling and filtering the flow or viscous fluid in a material melting and dispensing device is disclosed. The apparatus includes a rotatable valve assembly having a filter plate and a flow stoppage plate. Rotation of the valve alternately allows or halts the flow of viscous fluid. The convenient ability to block the flow of viscous fluid such as hot melt adhesive at a point immediately downstream of a hopper or material melt space facilitates repair, maintenance, or removal of other downstream elements such as a pump without the need for draining the hopper, while avoiding excessive spillage of hot melt adhesive.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: November 4, 1997
    Assignee: Illinois Tool Works Inc.
    Inventors: Jon C. Zook, Larry Warden