US 11,890,769 B2
Ultrasonic knife and ultrasonic cutting system
Antonello Valsecchi, Alserio (IT); and Bernardo Bezzola, Alserio (IT)
Assigned to Ceratizit Como S.P.A., Alserio (IT)
Appl. No. 17/415,114
Filed by CERATIZIT COMO S.P.A., Alserio (IT)
PCT Filed Nov. 27, 2019, PCT No. PCT/EP2019/082701
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/126364, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18212995 (EP), filed on Dec. 17, 2018.
Prior Publication US 2022/0048214 A1, Feb. 17, 2022
Int. Cl. B26D 7/08 (2006.01); B26D 1/00 (2006.01); B26D 7/26 (2006.01); C22C 29/06 (2006.01); C22C 29/08 (2006.01)
CPC B26D 7/086 (2013.01) [B26D 1/0006 (2013.01); B26D 7/2614 (2013.01); B26D 2001/002 (2013.01); C22C 29/067 (2013.01); C22C 29/08 (2013.01); Y10S 83/956 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An ultrasonic knife, comprising:
a cutting portion formed with at least one cutting edge and a fastening portion formed with an external thread for connection to a sonotrode;
said cutting portion and said fastening portion being formed in one piece from cemented carbide material;
said cemented carbide material comprising hard particles, at least predominantly formed by tungsten carbide, and a metallic binder; and
said external thread of said fastening portion having a thread pitch p and thread turns with a root having a rounded shape with a root radius R being 0.2*p≤R≤0.3*p.