|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B24D-013/18 B24B-023/02 B24D-009/08|
|미국특허분류(USC)||51/358 ; 51/170T ; 51/266 ; 51/356|
|발명자 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 3|
An improvement in backing discs for rotary sanders and the like has a plurality of radially offset blades on a back surface thereof with each blade being formed of a plurality of separate elements for flexibility of the blades and disc and the elements of each blade are formed to deflect upon striking a solid object.
An improved backing disc having a front face adapted to engage an abrasive material adapted to be rotated in a predetermined direction and having a plurality of blades extending from a back surface thereof in angularly offset relation to radii of said disc in outward trailing relation to the direction of disc rotation characterized by each of said blades being formed of a plurality of elements of limited cross section together defining a blade which is deflectable upon impact with a solid object.