1
David M Lerdman: Electronically commutated motor. General Electric Company, Ralph E Krisher Jr, A Burgess Lowe, October 2, 1979: US04169990 (308 worldwide citation)

A brushless DC motor is constructed with photosensitive device for detecting rotor shaft position. Arcuate permanent magnets on the rotor provide a DC flux field while distributed stationary armature windings, each spanning a fixed number of slots in the armature assembly, provide mutually perpendic ...


2
Douglas E Gerber, Kevin L Thomas: Random motion cleaner. The Hoover Company, A Burgess Lowe, Michael J Corrigan, June 3, 2003: US06571415 (139 worldwide citation)

A self-propelled bare floor cleaner is provided having a random motion generator which enhances the maneuverability of the bare floor cleaner. The random motion generator is rotatably attached to the frame of the cleaner and propels the cleaner across the floor in a random motion. This random motion ...


3
Adam C Sclafani, William G Alford, Kevin L Thomas: Multi-purpose position sensitive floor cleaning device. The Hoover Company, A Burgess Lowe, Brett A Schenck, June 3, 2003: US06572711 (112 worldwide citation)

This invention relates to a multi-purpose position sensitive floor cleaning device having two separate and distinct selective modes of operation whereby 180° longitudinal rotation of the floor cleaning device selectively activates one of the two separate and distinct selective modes of operation. Th ...


4
Evan A Gordon, Jay M Salem: Vacuum cleaner with a microprocessor-based dirt detection circuit. The Hoover Company, A Burgess Lowe, Michael J Corrigan, June 3, 2003: US06571422 (110 worldwide citation)

A vacuum cleaner for providing visual operational status indicators includes a vacuum cleaner having internal components that are indicative of the cleaner's performance. Sensors are coupled to at least one of the internal components to be monitored. A microprocessor receives input from the sen ...


5
Evan A Gordon: Vacuum cleaner with dirt detection. The Hoover Company, A Burgess Lowe, Richardson B Farley, March 11, 1997: US05608944 (102 worldwide citation)

The disclosure describes a vacuum cleaner having a dirt sensor circuit usable with an audio detector. The circuit provides amplification of the audio signal, a pulse stretcher, sensitivity selection of a non linear characteristic and visual signal means to indicate high or low levels of dirt concent ...


6
Jay M Salem, Evan A Gordon, Mark J Josef, Ronald D Schneider: Moisture indicator for wet pick-up suction cleaner. The Hoover Company, A Burgess Lowe, Brett A Schenck, December 21, 2004: US06832407 (97 worldwide citation)

The moisture sensor and indicator for a wet pickup vacuum cleaner, more particularly a wet extraction type carpet cleaner, is positioned in the suction duct to sense when water droplets or moisture is traveling through the suction duct. An indicator is activated to indicate to the operator that wate ...


7
Floyd H Wright: Method and apparatus for electronically commutating a direct current motor without position sensors. General Electric Company, Ralph E Krisher Jr, A Burgess Lowe, July 24, 1979: US04162435 (73 worldwide citation)

Method and apparatus for electronically commutating a direct current motor is disclosed not requiring position sensors but rather sampling induced voltage across an unenergized motor winding to derive control signals therefrom. One motor winding is energized while the voltage across another winding ...


8
Adam C Scalfani, Douglas E Gerber, A Ronald Keebler, Raymond L Lawter, Daniel R Miller: Cyclonic dirt cup assembly. The Hoover Company, A Burgess Lowe, November 14, 2000: US06146434 (60 worldwide citation)

A cyclonic dirt cup assembly for a vacuum cleaner has a generally conical truncated cone positioned within a dirt cup of the vacuum cleaner. The dirt cup has a wall formed with an air inlet opening for receiving a stream of dirt-laden air within the dirt cup. The cone is pivotally connected to a fra ...


9
Berton R Oxel: Carpet cleaning apparatus with auxiliary cleaning device arrangement. The Hoover Company, Gerald H Kreske, A Burgess Lowe, February 12, 1985: US04498214 (40 worldwide citation)

A carpet cleaning apparatus is disclosed which includes a new and improved auxiliary cleaning device arrangement incorporated in a conventional vacuum cleaner. The auxiliary cleaning device is movable into a carpet engaging position for frictionally engaging a carpet surface and simultaneously distr ...


10
Donald A Coates, Steven W Blate: Dirt collecting system for a floor care appliance. The Hoover Company, A Burgess Lowe, Michael J Corrigan, May 24, 2005: US06896719 (39 worldwide citation)

A dirt collecting system for a vacuum cleaner includes a dirt cup formed from a cylindrical sidewall having a disc shaped member separating the dirt cup into an upper portion and a lower portion. The dirty airstream flows past the disc shaped member from the upper portion to the lower portion throug ...