Patents by Inventor William J. Perham

William J. Perham 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: 4998479
    Abstract: A smoke generating device is disclosed which utilizes a rechargable cartridge containing a vaporizable, smoke producing solution. The cartridge includes an aperture which is filled by a one-way, flap-type seal. When mounting the cartridge to the smoke generating device, a feed tube is inserted through the flap-type seal into the cartridge. In this manner, the contents of the cartridge are supplied to a valve means within the smoke generating device. When the valve means is actuated, the smoke producing fluid flows through a vaporizer coil. Heat supplied by a gas burner or other heating device vaporizes the smoke producing solution which issues as a dense simulated smoke from a smoke discharge nozzle. In a preferred embodiment of the invention, a flow restricting means is provided in the vaporizer coil to maintain the rate of flow of smoke producing liquid within a predetermined range.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: March 12, 1991
    Inventors: William J. Perham, Daniel Watlington