Patents by Inventor David Lumby

David Lumby 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).

  • Dishwasher
    Patent number: 4919162
    Abstract: A sink located dishwasher is disclosed having a cover for the sink, a rack for dishes locatable in the sink, and a removable spray arm assembly mounted in the sink drain. The spary arm assembly includes a spray arm rotatably mounted at the upper end of a hollow shapft to rotate in the sink below the rack. A pair of seals are provided on the shaft to seal the shaft within the drain. Water is pumped from the drain above both seals and returned to the drain between the seals from where it flows up the hollow shaft and rotates the spray arm.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: April 24, 1990
    Assignee: McIlwraith Davey Pty. Ltd.
    Inventors: David Lumby, Stephen Dawkins