US 12,128,539 B2
Power tool with non-conductive driveshaft
Hans T. Banholzer, Milwaukee, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Nov. 22, 2023, as Appl. No. 18/517,891.
Application 18/517,891 is a continuation of application No. 18/075,206, filed on Dec. 5, 2022.
Application 18/075,206 is a continuation of application No. 16/747,676, filed on Jan. 21, 2020, granted, now 11,518,018, issued on Dec. 6, 2022.
Claims priority of provisional application 62/794,871, filed on Jan. 21, 2019.
Prior Publication US 2024/0083009 A1, Mar. 14, 2024
Int. Cl. B25F 5/00 (2006.01); B25F 5/02 (2006.01); A01G 3/08 (2006.01)
CPC B25F 5/02 (2013.01) [A01G 3/086 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power tool comprising:
an elongated shaft forming a handle;
a tool head located at one end of the handle, the tool head having a working element and a driven shaft configured to drive the working element;
a powerhead located at an opposite end of the handle, the powerhead having an input shaft; and
a driveshaft coupled between the tool head and the powerhead, the driveshaft having a first driveshaft portion rotatably driven by the input shaft and a second driveshaft portion coupled to the first driveshaft portion and the driven shaft, the second driveshaft portion configured to be driven by the first driveshaft portion to transfer torque from the powerhead to the working element of the tool head,
wherein
one of the first driveshaft portion or the second driveshaft portion is constructed of a non-conductive material, or
both of the first driveshaft portion and the second driveshaft portion are constructed of a non-conductive material.