Patents by Inventor Ian Louis De Villiers

Ian Louis De Villiers 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).

  • Reciprocating piston pump
    Patent number: 5836751
    Abstract: A diaphragm pump including a reciprocating piston engaging at opposite ends a pair of diaphragms which close opposite ends of a cylinder is disclosed. The piston ends engage the respective diaphragms across the entire dimension of the cylinder so that the membranes act as seals between the piston and the cylinder, thereby preventing unequal distortion of the diaphragm and enabling the pump to generate high pressure.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: November 17, 1998
    Assignee: Divwatt (Proprietary) Limited
    Inventor: Ian Louis De Villiers