Patents by Inventor Roderick Sawyer

Roderick Sawyer 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).

  • Vacuum dumping arrangement for a wet/dry vacuum cleaner
    Patent number: 4179768
    Abstract: A dumping system for a wet/dry tank type vacuum cleaner which functions to empty the liquid solution together with the dirt and debris accumulated in the tank. The dumping system is controlled by the operator who can selectively regulate the air flow and thereby control the dumping action of the system. The dirty liquid solution is pumped out of the intake hose of the vacuum cleaner.
    Type: Grant
    Filed: August 21, 1978
    Date of Patent: December 25, 1979
    Assignee: Aktiebolaget Electrolux
    Inventor: Roderick Sawyer