Patents by Inventor Larry C. Trevathan

Larry C. Trevathan 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).

  • Method and apparatus for hollow core extrusion of high viscosity materials
    Patent number: 5089190
    Abstract: A method and apparatus for dispensing a foamable, pressurized solution of a gas and a high viscosity polymeric material in a manner which produces a foamed bead having a hollow core. Initial foaming occurs in a nozzle through which the solution is dispensed to atmosphere, at a core of the bead. Subsequent foaming of of the bead exteriorly of the core occurs outside the nozzle, and results in an extruded, foamed bead of high viscosity polymeric material having a tubular shape and particularly suitable for form-in-place gasket applications.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: February 18, 1992
    Assignee: Nordson Corporation
    Inventors: Larry C. Trevathan, Scott C. Hoover, James C. Smith
  • Multi-orifice zero cavity nozzle dispenser
    Patent number: 4679711
    Abstract: A valved device for dispensing multiple closely spaced streams of liquid from a plurality of dispensing orifices. The device includes selectively actuatable valve needles associated with each of the dispensing orifices for controlling liquid flow from the orifices. A pair of oscillatable cam shafts, each having multiple cam surfaces of different configurations, controls actuation of the valve needles.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: July 14, 1987
    Assignee: Nordson Corporation
    Inventor: Larry C. Trevathan
  • Adhesive dispensing nozzle
    Patent number: 4601427
    Abstract: A nozzle for dispensing a solution of molten hot melt and gas. Upon emerging from the nozzle, gas is released from the solution to form a foamed hot melt. The nozzle comprises a body having a liquid flow passage therein, which flow passage contains a restrictor at the upstream end and a diverter flow path at the downstream end.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: July 22, 1986
    Assignee: Nordson Corporation
    Inventors: Larry C. Trevathan, Jerry R. Farmer