Patents by Inventor David Charlton, deceased

David Charlton, 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).

  • Sand and gravel dredges
    Patent number: 4033470
    Abstract: The invention relates to a sand and gravel dredge in which, for discharge ashore, the cargo is re-slurried in the hold by high pressure oscillating water jets at the center of the hold floor, creating a turbulent region from which the re-slurried material enters a duct keel through selectively-operable valves and is pumped to dewatering screens at deck level. The dewatered material from the screens is conveyed ashore and the water passing through the screens is directed into settling tanks from where it is recirculated to the high pressure jets.
    Type: Grant
    Filed: June 13, 1974
    Date of Patent: July 5, 1977
    Inventors: James Venus, David Charlton, deceased, by Martha Charlton, administratrix