Patent ID: 6692341
Filing Date: 2004-02-17
Classification: B24B

Abstract:
An abrasive machine, comprising:an abrasive plate; a plate holder holding said abrasive plate; a fixed engaging member being formed into a ring shape and fixed to said plate holder, said fixed engaging member engaging with an outer edge of said abrasive plate; a first O-ring being provided between a pressing face of said fixed engaging member and an upper face of said abrasive plate, said first O-ring separating the pressing face of said fixed engaging member from the upper face of said abrasive plate; a second O-ring being provided between an upper face of said plate holder and a lower face of said abrasive plate, said second O-ring separating the upper face of said plate holder from the lower face of said abrasive plate; and a fluid supply-discharge mechanism for supplying a fluid to and discharging the same from a zone enclosed by the lower face of said abrasive plate, the upper face of said plate holder and said second O-ring, said fluid supply-discharge mechanism changing a shape of an abrasive face of said abrasive plate by changing pressure of the fluid, wherein an outer circumferential face of said abrasive plate is separated from an inner circumferential face of said fixed engaging member.