US 11,766,001 B2
Blowing suction device
Xuefeng Yu, Jiangsu (CN); and Shiping Jiao, Jiangsu (CN)
Assigned to Positec Power Tools (Suzhou) Co., Ltd., Suzhou (CN)
Filed by Positec Power Tools (Suzhou) Co., Ltd, Jiangsu (CN)
Filed on Jun. 9, 2020, as Appl. No. 16/897,120.
Application 16/897,120 is a continuation of application No. PCT/CN2018/120684, filed on Dec. 12, 2018.
Claims priority of application No. 201711316309.1 (CN), filed on Dec. 12, 2017.
Prior Publication US 2020/0296904 A1, Sep. 24, 2020
Int. Cl. A01G 20/47 (2018.01); A47L 5/14 (2006.01); F04D 23/00 (2006.01); F04D 25/10 (2006.01); F04D 25/08 (2006.01)
CPC A01G 20/47 (2018.02) [A47L 5/14 (2013.01); F04D 23/003 (2013.01); F04D 25/084 (2013.01); F04D 25/105 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A blowing suction device, having a blowing mode and a suction mode, comprising:
a body, comprising a grip portion to be held by an operator;
an airflow generation apparatus, connected to the body, and comprising a motor, a fan driven by an output shaft of the motor and generating an airflow, and a volute surrounding the fan, the volute comprising an air inlet portion and an air outlet portion in communication with the outside;
a blowing-suction tube, having an opening in communication with the outside for air flowing into or flowing out,
wherein the volute is pivotally disposed relative to the grip portion and is rotatable between at least a blowing position in the blowing mode and a suction position in the suction mode, when the volute rotates to the blowing position, an airflow flows into an inner cavity of the volute from the air inlet portion and then flows into the blowing-suction tube from the air outlet portion of the volute, and when the volute rotates to the suction position, an airflow enters the air inlet portion of the volute from the opening and flows out from the air outlet portion, and
a blowing-suction switching mechanism,
wherein the blowing-suction switching mechanism is a linkage apparatus, the linkage apparatus is capable of driving a first end of the blowing-suction tube to be away from the air inlet portion or the air outlet portion of the volute by a preset distance and is capable of linking the volute to rotate relative to the grip portion to the blowing position in the blowing mode or to the suction position in the suction mode, when the volute rotates from the blowing position to the suction position, the linkage apparatus is capable of linking the first end of the blowing-suction tube to face the air inlet portion, and when the volute switches from the suction mode to the blowing mode, the linkage apparatus is capable of linking the first end of the blowing-suction tube to face the air outlet portion.