Patent ID: 7322878

Claim:
A belt grinder, comprising: a motor; a driving disc coupled to the motor; a contact disc; a grinding belt routed over the driving disc and the contact disc; a housing enclosing the driving disc, the contact disc, and the driving belt; a cover plate slideably mounted to the housing, wherein the motor is connected to the cover plate; and a pneumatic spring connected at one end to a lever and at an opposite end to the cover plate, wherein the lever is connected to the housing and wherein the lever moves the pneumatic spring and the cover plate to vary a distance between an axis of the contact disc and an axis of the driving disc; a motor flange fixed at one end to the cover plate and moveable at an opposite end, wherein the motor is connected to the motor flange; and a threaded spindle connected to the cover plate and the opposite end of the motor flange, wherein the threaded spindle moves the opposite end of the motor flange away from the cover plate to vary an angle between an axis of the contact disc and an axis of the driving disc.