US 12,270,419 B2
Electric tool
Koon For Chung, Kwai Chung (CN); and Yan Jia Wang, Dongguan (CN)
Assigned to TECHTRONIC CORDLESS GP, Anderson, SC (US)
Filed by TECHTRONIC CORDLESS GP, Anderson, SC (US)
Filed on Mar. 15, 2022, as Appl. No. 17/695,239.
Claims priority of application No. 202110316414.5 (CN), filed on Mar. 23, 2021; and application No. 202110948998.8 (CN), filed on Aug. 18, 2021.
Prior Publication US 2022/0307518 A1, Sep. 29, 2022
Int. Cl. F04D 29/66 (2006.01); A01G 20/47 (2018.01); F04D 17/10 (2006.01)
CPC F04D 29/664 (2013.01) [A01G 20/47 (2018.02); F04D 17/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric tool, wherein the electric tool comprises:
a housing, comprising a first opening through an exterior surface of the housing;
working equipment, the working equipment being selected from the group consisting of:
a centrifugal fan, an axial fan, a cutter, and a drill;
a motor, at least partially located in the housing and driving the working equipment;
a surrounding structure, located in the housing and at least partially surrounding the motor, the surrounding structure defining a second opening, the first opening and the second opening having different orientations; and
a blocking structure located between the first opening and the second opening such that air can go around the periphery of the blocking structure and through the first opening, the blocking structure being configured to substantially block any direct pathway for noise generated by the working equipment and/or the motor through the first opening and the second opening, wherein the blocking structure does not form part of the exterior surface of the housing.