Patents by Inventor Johann Maria Ensink

Johann Maria Ensink 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).

  • Cast metal heat exchanger, as well as mould therefor
    Patent number: 4089302
    Abstract: Cast metal heat exchanger and mould therefor, in particular a fired central heating boiler operating on water or medium circulation, with two or more externally ribbed, hollow sections through which the water and about which the flue gases can flow, wherein the sections are cast integrally in sealed form at their end edges with sidewalls and end walls extending over the entire boiler length, except for the gas and water communication openings, on the side where the water and flue gas are present with respect to the outside atmosphere.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: May 16, 1978
    Assignee: Remeha Fabrieken br - The Netherlands
    Inventor: Johann Maria Ensink