Patents by Inventor H.J. Righolt

H.J. Righolt 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).

  • Publication number: 20010052585
    Abstract: The present invention pertains to a device for applying fluid material on a substrate, with a supply canal for supplying material from a source of material, a main body with an outlet canal which communicates with the supply canal and ends in an outlet opening for delivering the material. A valve assembly located in the main body interrupts the flow of material in the outlet canal, which has a valve seat and a valve body which can move relative to the valve seat, as well as a tensioning device which pre-tensions the valve body in a closed or open position. A drive unit moves the valve body between a closed position which interrupts the flow of material and an open position which releases the flow of material. The supply canal is connected to the outlet canal in a lower part of the main body which is preferably close to the outlet opening, and the tensioning device for pre-tensioning the valve body is located in the lower area of the main body.
    Type: Application
    Filed: May 15, 2001
    Publication date: December 20, 2001
    Applicant: Nordson Corporation
    Inventors: H. J. Righolt, V. de Leeuw
  • Publication number: 20010045437
    Abstract: The present invention pertains to a spreading device for spreading fluids, especially for devices for applying adhesives, with a distributing block which has a fluid canal and an inlet opening for introducing fluid into the fluid canal and an outlet opening for discharging fluid from the fluid canal. At least two distributing blocks may be positioned and fixed adjacent to each other in such a way that the fluid canals of adjacent distributing blocks are connected to each other, so that fluid can flow from the fluid canal of one distributing block into the fluid canal of the adjacent distributing block.
    Type: Application
    Filed: May 15, 2001
    Publication date: November 29, 2001
    Applicant: Nordson Corporation
    Inventor: H.J. Righolt