Patents by Inventor Donahue B. Silvis

Donahue B. Silvis 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).

  • Patent number: 3974541
    Abstract: A self-contained portable apparatus for cleaning a floor cover, such as a carpet. The apparatus comprises vacuum chambers; electric motor driven vacuum creating mechanisms; vacuum nozzles operatively associated with the vacuum chambers; a spray bar and nozzles operatively connected with a source of water; a source of emulsifying agent; a siphon device for extracting emulsifying agent from its source and introducing it into the water flowing to the spray nozzles; a heating element for heating the water as it flows to the spray bar; and appropriate valving and plumbing; all of which are included within a single housing. In addition, the housing includes a roller so that the apparatus may be easily rolled over the floor cover to be cleaned. There is also included a hand tool operatively connected with one of the vacuum chambers of the apparatus for cleaning the floor in hard to get at places too small or inconvenient to reach with the self-contained floor cover cleaning apparatus.
    Type: Grant
    Filed: November 1, 1973
    Date of Patent: August 17, 1976
    Inventors: Donahue B. Silvis, Edward A. Vargas