Patents by Inventor David C. Kumpf

David C. Kumpf 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).

  • Dirt separation system for a vacuum cleaner
    Patent number: 7360275
    Abstract: A vacuum cleaner includes a dirt separation system that has a dirt cup retaining a filter assembly having a screen element, an exit, and a filter element disposed between the screen element and the exit. A nozzle disposed in the dirt cup directs an airstream generally parallel to the surface of the screen element so that particles in the airstream are primarily separated by the screen element and, as the airstream ultimately travels towards the exit in the dirt cup, are secondarily separated by the filter element.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: April 22, 2008
    Inventors: David M. Allgeier, Erik D. Lesco, Jerry L. Balzer, David C. Kumpf
  • Removable dirt separation system for a vacuum cleaner
    Patent number: 6875255
    Abstract: A removable dirt separation system for a vacuum cleaner is disclosed. The dirt separation system includes a dirt cup having a number of outer walls having a first portion defined by a filter assembly and a second portion with a first translucent panel to allow viewing material which accumulates within the dirt cup. The dirt cup further includes a top opening allow emptying of the dirt cup and an inlet in fluid communication with a suction nozzle of the vacuum cleaner. The dirt separation system further includes a lid for sealing the upper opening of the dirt cup. The dirt separation system yet further include a dirt duct for routing air which exits the filter assembly to an exit opening of the dirt separation system. A method of operating a removable dirt separation system for a vacuum cleaner is also disclosed.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 5, 2005
    Assignee: The Hoover Company
    Inventors: William G. Alford, Jerry L. Balzer, Greg A. Bilek, Joseph A. Garisto, Erik D. Lesco, David C. Kumpf, Edgar A. Maurer, David P. Parks, Jackson W. Wegelin
  • Removable dirt separation system for a vacuum cleaner
    Publication number: 20030208878
    Abstract: A removable dirt separation system for a vacuum cleaner is disclosed. The dirt separation system includes a dirt cup having a number of outer walls having a first portion defined by a filter assembly and a second portion with a first translucent panel to allow viewing material which accumulates within the dirt cup. The dirt cup further includes a top opening allow emptying of the dirt cup and an inlet in fluid communication with a suction nozzle of the vacuum cleaner. The dirt separation system further includes a lid for sealing the upper opening of the dirt cup. The dirt separation system yet further include a dirt duct for routing air which exits the filter assembly to an exit opening of the dirt separation system. A method of operating a removable dirt separation system for a vacuum cleaner is also disclosed.
    Type: Application
    Filed: May 8, 2002
    Publication date: November 13, 2003
    Inventors: William G. Alford, Jerry L. Balzer, Greg A. Bilek, Joseph A. Garisto, Erik D. Lesco, David C. Kumpf, Edgar G. Maurer, David P. Parks, Jackson W. Wegelin