Balancing Weight System for Hand-Held Surface Angle Grinders

Abstract

This invention is a device and method for weighting and balancing ar hand-held electric angle grinder. A weight shaft is mounted on the frame of the angle grinder coaxially with the axis of rotation of the angle grinder motor. A selection of weights can be mounted on the weight shaft to provide extra downward pressure, through the motor and frame, to the grinding disc of the angle grinder. The weights are also selected to suppress vibration that is produced by the interaction between the grinding disc and the surface. As a result, the present invention provides an angle grinder that is easier and less exhaustingI to use, is less likely to have any harmful effects on the user, is able to provide a more effective functioning of the angle grinder, and is able to provide a treated work surface of better quality and less expense.

1 . An angle grinder, comprising:
 a. an motor having a working end and an upper end, and having an axis of rotation, and   b. a removable weight mounted adjacent the upper end of the motor and around the axis of rotation.   
     
     
         2 . An angle grinder as recited in  claim 1 , wherein the center of mass is on the axis of rotation to suppress vibration of the angle grinder when the angle grinder is is in use. 
     
     
         3 . An angle grinder as recited in  claim 1 , wherein the center of mass is sufficiently close to the axis of rotation to suppress vibration of the angle grinder when the angel grinder is is in use. 
     
     
         4 . An angle grinder as recited in  claim 1 , wherein the position of the weight on the grinder is adapted to apply downward pressure to the motor. 
     
     
         5 . An angle grinder as recited in  claim 1 , wherein the position of the weight on the grinder is adapted to suppress vibration of the angle grinder during operation. 
     
     
         6 . An angle grinder, as recited in  claim 1 , wherein the position of the weight on the grinder is adapted to apply downward pressure to the motor, and adapted to suppress vibration of the angle grinder during operation. 
     
     
         7 . An angle grinder as recited in  claim 1 , wherein the removable weight has a center of mass, and when mounted on the angle grinder, has its center of mass adjacent the axis of rotation of the motor. 
     
     
         8 . An angle grinder as recited in  claim 1 , wherein the removable weight has a center of mass, and when mounted on the angle grinder, has its center of mass adjacent the axis of rotation of the motor, and the weight is symmetrical about the axis of rotation. 
     
     
         9 . An angle grinder as recited in  claim 1 , wherein the grinder has a weight shaft and the removable weight can be mounted on the weight shaft. 
     
     
         10 . An angle grinder as recited in  claim 1 , wherein the grinder has a bracket removably mounted it and a weight shaft mounted on the weight bracket. 
     
     
         11 . An angle grinder as recited in  claim 1 , wherein the grinder has a bracket removably mounted it, a weight shaft mounted on the weight bracket, and a removable weight mounted on the weight shaft. 
     
     
         12 . An angle grinder as recited in  claim 1 , wherein the grinder has a weight shaft co-axial to the axis of rotation, and the removable weight can be mounted on the weight shaft. 
     
     
         13 . A weight having a center of mass, the weight being removably mounted on an angle grinder, said angle grinder having an electric motor with an axis of rotation, so that the center of mass of the weight is located adjacent the axis of rotation of the motor, thereby selectively adding weight through the axis of rotation and suppressing vibration of the angle grinder. 
     
     
         14 . A weight as recited in  claim 13 , wherein the center of mass is on the the axis of rotation to suppress vibration of the angle grinder when the angel grinder is is in use. 
     
     
         15 . A weight as recited in  claim 13 , wherein the center of mass is sufficiently close to the axis of rotation to suppress vibration of the angle grinder when the angel grinder is is in use. 
     
     
         16 . An accessory for an angle grinder for treating surfaces, the angle grinder including a frame elongated along a frame axis, a motor mounted in the frame, and having a rotatable motor shaft that rotates about a motor axis that is perpendicular to the frame axis, the accessory comprising,
 a. weight bracket, mountable to the frame of the angle grinder,   b. a weight shaft mountable on the weight bracket, and coaxial with the motor axis, and   c. a weight mountable on the weight shaft, and adapted to provide downward pressure on the frame.   
     
     
         17 . An accessory for an angle grinder, as recited in  claim 12 , wherein the weight is adapted to suppress vibration of the angle grinder.