Patents by Inventor Pierre G. Hance

Pierre G. Hance 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).

  • Sump pump
    Patent number: 3973871
    Abstract: A sump pump comprising a sump having an inlet for the liquid to be pumped and a discharge outlet, the pump proper being received at the bottom of the sump and being driven by a vertically mounted shaft. The pump comprises two impellers each having two intakes, the impellers being mounted one above the other on the shaft and surrounded by two volutes each having one or two outlets which are connected to the inlets of a collecting manifold, the outlet of such manifold being connected to the outlet of the sump.
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: August 10, 1976
    Assignee: Ateliers de Constructions Electriques de Charlerol (ACEC)
    Inventor: Pierre G. Hance