US 12,168,982 B2
Portable blower fan assembly
Jeffrey R. Staszak, Deerfield, WI (US); Kevin Lawrence Askling, Madison, WI (US); Todd R. DeMonte, Cottage Grove, WI (US); Todd Brunner, Madison, WI (US); Matthew J. Poster, Madison, WI (US); Jenee LaPlace Mobley, Fuquay Varina, NC (US); David Treleven, Raleigh, NC (US); Xueqiao Wang, Foshan (CN); and Laurence A. Carlson, Stoughton, WI (US)
Assigned to THERMA-STOR LLC, Madison, WI (US)
Filed by THERMA-STOR LLC, Madison, WI (US)
Filed on May 9, 2022, as Appl. No. 17/739,374.
Application 17/739,374 is a continuation of application No. 17/061,634, filed on Oct. 2, 2020, granted, now 11,391,286.
Prior Publication US 2022/0260083 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 19/00 (2006.01); F04D 25/06 (2006.01); F04D 25/16 (2006.01)
CPC F04D 19/002 (2013.01) [F04D 25/06 (2013.01); F04D 25/166 (2013.01); F05D 2240/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A portable blower fan device, comprising: a housing comprising: a first air tunnel comprising a first intake portion and a first exhaust portion, wherein a lower portion of the housing comprises a first pair of focus corners, wherein each focus corner in the first pair of focus corners is a portion of the housing comprising a respective curved or sloped surface configured to reduce a pressure at a base of the housing, the first pair of focus corners configured to provide a first airflow path that exits the housing at a downward angle below a centerline of the portable blower fan device from the first intake portion to the first exhaust portion of the first air tunnel; and a second air tunnel comprising a second intake portion and a second exhaust portion, wherein the lower portion of the housing comprises a second pair of focus corners, wherein each focus corner in the second pair of focus corners is a portion of the housing comprising a respective curved or sloped surface configured to reduce the pressure at the base of the housing, the second pair of focus corners configured to provide a second airflow path that exits the housing at the downward angle below the centerline of the portable blower fan device from the second intake portion to the second exhaust portion of the second air tunnel; a first fan assembly disposed between first intake portion and the first exhaust portion of the first air tunnel, wherein the first fan assembly comprises a first fan blade and a first motor; and a second fan assembly disposed between the second intake portion and the second exhaust portion of the second air tunnel, wherein the second fan assembly comprises a second fan blade and a second motor; an upper housing cover coupled to an upper portion of the housing, wherein the upper housing cover comprises a first pair of channels; and a plurality of positioning legs, wherein: each positioning leg is at least partially disposed within a respective channel from among the first pair of channels; each positioning leg is configurable to extend at least partially outside of the respective channel from among the first pair of channels; and wherein each positioning leg of the plurality of positioning legs is configured with an adjustable length.