Patents by Inventor Donald J. Davidshofer

Donald J. Davidshofer 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: 8650707
    Abstract: A vacuum cleaner is disclosed having a motor inlet conduit and sound deadening material disposed within the motor inlet conduit for reducing the overall noise level of the vacuum cleaner. The motor inlet conduit fluidly connects a dirt receptacle chamber and a motor inlet, and may have a generally continuous cross-sectional profile and one or more expanded regions for housing the sound deadening material. With the sound deadening material installed in the one or more expanded regions, the motor inlet conduit may form a smoothly changing profile along its entire length and reduce the overall noise level of the vacuum cleaner.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: February 18, 2014
    Assignee: Electrolux Home Care Products, Inc.
    Inventors: Thomas W. Hawkins, Donald J. Davidshofer, Bradley E. Chenoweth
  • Publication number: 20130031743
    Abstract: A vacuum cleaner is disclosed having a motor inlet conduit and sound deadening material disposed within the motor inlet conduit for reducing the overall noise level of the vacuum cleaner. The motor inlet conduit fluidly connects a dirt receptacle chamber and a motor inlet, and may have a generally continuous cross-sectional profile and one or more expanded regions for housing the sound deadening material. With the sound deadening material installed in the one or more expanded regions, the motor inlet conduit may form a smoothly changing profile along its entire length and reduce the overall noise level of the vacuum cleaner.
    Type: Application
    Filed: August 6, 2012
    Publication date: February 7, 2013
    Applicant: Electrolux Home Care Products, Inc.
    Inventors: Thomas W. Hawkins, Gregory W. Luebbering, Donald J. Davidshofer, Bradley E. Chenoweth
  • Patent number: 8234750
    Abstract: A vacuum cleaner having a base with a: nozzle opening, rear housing attached to the base, dirt separator with inlet and outlet passages, vacuum fan, accessory hose, and valve system to connect the separator alternately to the nozzle opening and hose. The valve system has a valve body having a first inlet connected to the nozzle opening and a second inlet connected to the hose, a hose connector that pivots with respect to the valve body, a connector passage through the hose connector, and a flexible outlet hose having a first end connected to the connector passage and a second end connected to the separator inlet passage. The valve inlets are generally equidistant from the connector pivot and the hose connector is pivotable to rotate the first hose end relative to the second hose end to selectively place the connector passage in communication with the first and second valve inlets.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: August 7, 2012
    Assignee: Electrolux Home Care Products, Inc.
    Inventors: Thomas W. Hawkins, Gregory W. Luebbering, Donald J. Davidshofer, Bradley E. Chenoweth
  • Publication number: 20100175218
    Abstract: A vacuum cleaner having a base with a: nozzle opening, rear housing attached to the base, dirt separator with inlet and outlet passages, vacuum fan, accessory hose, and valve system to connect the separator alternately to the nozzle opening and hose. The valve system has a valve body having a first inlet connected to the nozzle opening and a second inlet connected to the hose, a hose connector that pivots with respect to the valve body, a connector passage through the hose connector, and a flexible outlet hose having a first end connected to the connector passage and a second end connected to the separator inlet passage. The valve inlets are generally equidistant from the connector pivot and the hose connector is pivotable to rotate the first hose end relative to the second hose end to selectively place the connector passage in communication with the first and second valve inlets.
    Type: Application
    Filed: January 6, 2010
    Publication date: July 15, 2010
    Inventors: Thomas W. Hawkins, Gregory W. Luebbering, Donald J. Davidshofer, Bradley E. Chenoweth
  • Patent number: 7662200
    Abstract: A vacuum cleaner dirt containment system with a bag chamber having an open end, an outlet adapted to be in fluid communication with a vacuum fan inlet located on the vacuum cleaner housing, and a plurality of locator ribs extending from an inner wall of the bag chamber. Each locator rib has a landing adjacent an inner wall of the bag chamber, and a pin located inward of the landing and extending from the landing towards the open end of the bag chamber. A filter bag assembly is adapted to be inserted into the bag chamber, and has a flange attached to an open end of a permeable filter bag. A flange air inlet passes through the flange into the bag. The flange has openings located to be inserted over the locator rib pins, and support segments located to abut the locator rib landings. The lid is selectively attachable to the open end of the bag chamber, and includes an air inlet mounting tube that extends into the flange air inlet when the lid is attached to the open end of the bag chamber.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: February 16, 2010
    Assignee: Electrolux Home Care Products, Inc.
    Inventors: Steven L. Knuth, Donald J. Davidshofer, Randall Sandlin
  • Publication number: 20080307597
    Abstract: A vacuum cleaner brushroll having a pulley with a generally circular pulley surface surrounding at least one opening located radially inward of the pulley surface, and an elongated shaft passing through the central opening. The pulley may surrounds and be captured in place by a mounting portion of the elongated shaft that is formed as continuous single structure. A mounting portion of the shaft comprising a continuous structure having a reduced cross section into which the pulley fits may be located within and on either side of the pulley's central opening. A process for making a brushroll is also provided.
    Type: Application
    Filed: June 12, 2007
    Publication date: December 18, 2008
    Inventors: Donald J. DAVIDSHOFER, Vincent Bobrosky, Brad Chenoweth, Ping Fai Fung
  • Patent number: D657510
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: April 10, 2012
    Assignee: Electrolux Home Care Products, Inc.
    Inventors: Sok-Min Chang, Donald J. Davidshofer, William Reimer, Brian Wang Sun