Patents by Inventor Josef Keizers

Josef Keizers 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).

  • Patent number: 5283991
    Abstract: The invention relates to a sandblasting method using abrasives, such as untreated sands and in particular river and quarry sands, the abrasive and water being fed to a pressure tank (1a), a flowable water-abrasive mixture being produced in the pressure tank (1a) and this mixture being removed from the pressure tank (1a) and fed through a hose pipe (20) to a blast nozzle (21). The invention also relates to a moist-sand blasting apparatus (1). In order to provide a universally applicable sandblasting method and a corresponding apparatus, the invention permits water, compressed air and water-abrasive mixture to be fed to the hose pipe (20) via switch means (13, 15, 17) of a control unit (100) alternatively per se or in the combinations water and compressed air, water and water-abrasive mixture, compressed air and water, and water, compressed air and water-abrasive mixture.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: February 8, 1994
    Inventor: Josef Keizers