US 12,303,927 B2
Spray gun
Yimin Sun, Suzhou (CN); Shisong Zhang, Suzhou (CN); and Hongfeng Zhong, Suzhou (CN)
Assigned to POSITEC POWER TOOLS (SUZHOU) CO., LTD., Suzhou (CN)
Filed by POSITEC POWER TOOLS (SUZHOU) CO., LTD., Suzhou (CN)
Filed on May 18, 2022, as Appl. No. 17/747,206.
Application 17/747,206 is a continuation of application No. PCT/CN2020/130133, filed on Nov. 19, 2020.
Claims priority of application No. 201911133021.X (CN), filed on Nov. 19, 2019.
Prior Publication US 2022/0274123 A1, Sep. 1, 2022
Int. Cl. B05B 7/24 (2006.01)
CPC B05B 7/2416 (2013.01) [B05B 7/2429 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A spray gun for atomizing a liquid by an airflow, comprising:
a first shell;
a fan module, received in the first shell, for generating the airflow, the fan module comprising a brushless motor and a fan driven to rotate by the brushless motor;
a sleeve, formed or mounted on the first shell;
a nozzle assembly, disposed at an end of the sleeve away from the fan module and provided with a liquid outlet;
a spray bar assembly, received in the sleeve and configured to move along a longitudinal axis of the spray bar assembly to open or close the liquid outlet, and
a handle for an operator to hold,
wherein the fan module has a maximum outer diameter D1 between 30 mm and 80 mm, and a rotation axis of the brushless motor is parallel to or coincident with the longitudinal axis of the spray bar assembly,
in a case that the maximum outer diameter D1 is more than or equal to 30 mm and less than or equal to 45 mm, the rotation axis of the brushless motor is coincident with the longitudinal axis of the spray bar assembly; or
in a case that the maximum outer diameter D1 is greater than 45 mm and less than or equal to 80 mm, the rotation axis of the brushless motor is parallel to the longitudinal axis of the spray bar assembly at a distance L1 satisfying (D1−45)/2+2.5 mm≤L1≤20 mm, the rotation axis of the brushless motor is further away from the handle than the longitudinal axis of the spray bar assembly in a direction perpendicular to the longitudinal axis.