US 12,408,585 B2
Force amplified fastener for power tool implements
Koon For Chung, Kwai Chung (CN); and Tsz Kin Wong, Kwai Chung (CN)
Assigned to TECHTRONIC CORDLESS GP, Anderson, SC (US)
Appl. No. 18/287,777
Filed by TECHTRONIC CORDLESS GP, Anderson, SC (US)
PCT Filed Apr. 23, 2021, PCT No. PCT/CN2021/089276
§ 371(c)(1), (2) Date Oct. 20, 2023,
PCT Pub. No. WO2022/222135, PCT Pub. Date Oct. 27, 2022.
Prior Publication US 2024/0191777 A1, Jun. 13, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F16H 13/06 (2006.01); A01D 34/416 (2006.01); A01D 34/73 (2006.01); F16H 1/32 (2006.01); F16H 35/00 (2006.01)
CPC A01D 34/733 (2013.01) [A01D 34/4165 (2013.01); F16H 1/32 (2013.01); A01D 34/416 (2013.01); F16H 1/321 (2013.01); F16H 2001/323 (2013.01); F16H 13/06 (2013.01); F16H 2035/005 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A force amplified fastener assembly for removably coupling a detachable implement to a power tool, the force amplified fastener assembly comprising:
a top housing forming a cupped casing;
a bottom structure nested within an area of the cupped casing;
a fastening element disposed between the top housing and the bottom structure and within the area of the cupped casing, wherein the fastening element is configured for engagement with a shaft of the power tool;
a force amplifying gear train disposed in the area of the cupped casing and in mechanical communication with the top housing, the bottom structure, and the fastening element, wherein the force amplifying gear train provides a mechanical advantage with respect to application of torque to the fastening element in response to torque applied to the top housing; and
a lock mechanism disposed within the area of the cupped casing of the top housing and operative to prevent rotation of the fastening element relative to the shaft in at least one rotational direction.