Patents by Inventor Pieter Visser, deceased

Pieter Visser, deceased 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).

  • Apparatus for separating solids of different shapes
    Patent number: 4538735
    Abstract: Apparatus for separating spherically-shaped solids from irregularly-shaped solids comprising a rotatable separating table having a frustoconically shaped upper surface, the angle of inclination of the upper surface with the horizontal being such that spherically-shaped solids supplied onto the upper surface will roll down towards a central vertical conduit at the lower end of the upper surface and irregularly-shaped solids supplied onto the upper surface remain at rest. The apparatus further includes a number of supply structures for the supplying of a mixture of spherically-shaped solids and irregularly-shaped solids onto the upper surface and removal means for removing irregularly-shaped solids from the upper surface.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: September 3, 1985
    Assignee: Shell Oil Company
    Inventors: Johannes Boom, Teunis Terlouw, Pieter Visser, deceased