Patents by Inventor Ray V. Smith

Ray V. Smith 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).

  • Hot melt adhesive pumping apparatus having pressure-sensitive feedback control
    Patent number: 4144986
    Abstract: A high-capacity pumping apparatus for handling thermoplastic materials such as hot melt adhesives is provided which is capable of safely and efficiently pumping materials heretofore thought to be impractical because of the high flow and melting points thereof. The apparatus preferably includes a heated pressure plate, an elongated, tapered, material-conveying barrel connected thereto, a complementally tapered, axially shiftable auger with the barrel, and pressure-responsive means coupled to the auger for automatically shifting the auger relative to the barrel in order to temporarily decrease pumping efficiency during momentary slowdowns in material flow so that dangerous pressure buildups within the apparatus are avoided, and for returning the auger to its normal pumping position when adequate material flow resumes.
    Type: Grant
    Filed: December 15, 1977
    Date of Patent: March 20, 1979
    Inventors: Ray V. Smith, Ray F. Smith, Wesley D. Brizendine, Robert L. Boatman
  • Hot melt adhesive pumping apparatus having pressure-sensitive feedback control
    Patent number: 4090640
    Abstract: A high-capacity pumping apparatus for handling thermoplastic materials such as hot melt adhesives is provided which is capable of safely and efficiently pumping materials heretofore thought to be impractical because of the high flow and melting points thereof. The apparatus preferably includes a heated pressure plate, an elongated, tapered, material-conveying barrel connected thereto, a complementally tapered, axially shiftable auger with the barrel, and pressure-responsive means coupled to the auger for automatically shifting the auger relative to the barrel in order to temporarily decrease pumping efficiency during momentary slowdowns in material flow so that dangerous pressure buildups within the apparatus are avoided, and for returning the auger to its normal pumping position when adequate material flow resumes.
    Type: Grant
    Filed: September 22, 1976
    Date of Patent: May 23, 1978
    Inventors: Ray V. Smith, Ray F. Smith, Wesley D. Brizendine, Robert L. Boatman