US 11,890,741 B2
Contactless trigger with rotational magnetic sensor for a power tool
Maxwell L. Merget, Milwaukee, WI (US); Douglas R. Fieldbinder, Greendale, WI (US); and Jacob P. Schneider, Cedarburg, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Appl. No. 17/056,090
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
PCT Filed May 12, 2020, PCT No. PCT/US2020/032442
§ 371(c)(1), (2) Date Nov. 17, 2020,
PCT Pub. No. WO2020/231974, PCT Pub. Date Nov. 19, 2020.
Claims priority of provisional application 62/870,353, filed on Jul. 3, 2019.
Claims priority of provisional application 62/847,103, filed on May 13, 2019.
Prior Publication US 2022/0134532 A1, May 5, 2022
Int. Cl. B25F 5/02 (2006.01); H01H 13/14 (2006.01); H01H 13/20 (2006.01)
CPC B25F 5/02 (2013.01) [H01H 13/14 (2013.01); H01H 13/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A trigger assembly for a power tool comprising:
a housing;
a moveable plunger extending from a surface of the housing, the moveable plunger including a first end disposed externally from the housing and a second end disposed internally within the housing;
a trigger shoe coupled to the first end of the moveable plunger;
an arm including a first side that is moveably connected to the second end of the moveable plunger and a second side that is coupled to a magnet; and
a sensor configured to sense a magnetic field of the magnet,
wherein movement of the trigger shoe rotates the magnet and alters the magnetic field sensed by the sensor.