公开(公告)号：US07069662B2

公开(公告)日：2006-07-04

申请号：US10855903

申请日：2004-05-27

申请人： George CH Fung ,  Patrick CK Kwok ,  Vincent P. Cooper ,  Leo Driessen ,  Chan Ka Shing

发明人： George CH Fung ,  Patrick CK Kwok ,  Vincent P. Cooper ,  Leo Driessen ,  Chan Ka Shing

IPC分类号： B23B45/14 ,  G01C9/00

CPC分类号： B25H1/0085

摘要： A power tool includes a leveling device which includes a rotatable member which seeks an equilibrium position which corresponds to a level position. A rotating device includes a member which enables passage of a beam. An electrical circuit which includes an emitting device, a receiving device and an indicating device is electrically coupled such that upon activation, the emitting device emits a beam which passes through the beam passing member. The beam is received by the receiving device which, in turn, activates the indicator device. The indicator is generally a light emitting device which has a varying brightness so that the user may view the indicator from all sides of the power tool.