Patents by Inventor John B. Vessels

John B. Vessels 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).

  • Agricultural spray nozzle with fluid operated orifice cleaning member
    Patent number: 4381078
    Abstract: Improvements in a spray nozzle with fluid operated orifice cleaning member, these improvements consisting of an additional conduit connecting the lower chamber with the source, distance limiting devices limiting the distance of travel of the diaphragm, and a resilient washer to be compressed upon the downward movement of the diaphragm to minimize dripping.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: April 26, 1983
    Inventor: John B. Vessels
  • Agricultural spray nozzle with fluid operated orifice cleaning member
    Patent number: 4248381
    Abstract: A device that is capable of unclogging a sprayer nozzle from the operator's platform and also acts as a no drip device and is capable of performing said operations in the presence of abrasion, corrosive action, and the buildup of dried material found in the use of agricultural spray materials.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: February 3, 1981
    Inventor: John B. Vessels