公开(公告)号：US20240342534A1

公开(公告)日：2024-10-17

申请号：US18293691

申请日：2022-08-10

申请人： The Curators of the University of Missouri

发明人： Ashok Midha ,  Vamsi Lodagala ,  Pratheek Bagivalu Prasanna ,  Kyle Buschkoetter ,  Jyothi Komatireddy ,  Sushrut G. Bapat

IPC分类号： A63B21/00 ,  A63B21/02 ,  A63B21/04

CPC分类号： A63B21/00076 ,  A63B21/028 ,  A63B21/0421 ,  A63B21/4045

摘要： A variable resistance device includes first and second body elements and a force-generating system disposed therebetween. The force-generating system includes a resiliently deflectable beam extending relative to the first body element and toward the second body element, an interface element, and a cam projecting relative to the second body element and toward the first body element. The cam presents a cam surface. The interface element shifts along the cam surface upon application of a driving force to at least one of the body elements relative to the other and consequent shifting of the body elements relative to each other, resulting in corresponding bending of the beam and consequent generation of a resistance force by the beam. The cam surface presents a profile that varies along a length thereof, such that the resistance force generated by the beam varies irregularly as the interface element moves along the cam surface.

公开(公告)号：US20240025069A1

公开(公告)日：2024-01-25

申请号：US18355971

申请日：2023-07-20

申请人： The Curators of the University of Missouri

发明人： Ashok Midha ,  Pratheek Bagivalu Prasanna ,  Vamsi Lodagala ,  Sushrut G. Bapat ,  Prem Midha

IPC分类号： B26B25/00

CPC分类号： B26B25/005 ,  B26B25/002

摘要： A roller cutter for cutting a material includes a rotatable roller, a rotatable blade, and a rotation transmission mechanism. The roller includes an outer rim configured to engage the material at a roller engagement point. The blade includes a cutting edge configured to cut the material at a blade engagement point. The blade engagement point is spaced from the roller engagement point. The rotation transmission mechanism is configured to drivingly interconnect the blade and the roller such that the blade rotates faster than the roller. The roller cutter is configured such that the cutting edge applies both a compressive shear force and a tangential shear force to the material at the blade engagement point as the blade is pressed into the material and the blade and the roller rotate.