Double-Sided Flap Disc for Use with a Mounted Grinder

Abstract

A double-sided flap disc for use on a mounted grinder. A carrier plate has abrasive flaps attached around its outer perimeter on both sides. The flaps are arranged so that each side mirrors the other, that is, the flaps attached to one side face clockwise and the flaps attached to the other side face counterclockwise. This allows a U-shaped workpiece, such as a horseshoe, to be moved side to side against both sides of the disc, to provide symmetrical grinding.

What is claimed is: 
     
         1 . A double-sided flap disc for use on a mounted grinder, the grinder having a rotating arbor, comprising:
 a carrier plate made from a planar rigid material and being round with a flat face on both sides;   wherein the carrier plate has a center hole suitable for use in mounting the disc on the arbor;   on each face of the carrier plate, a series of abrasive flaps arranged around the outer perimeter of the carrier plate;   wherein each flap is attached to the carrier plate along a fixed edge of the flap that is opposing a free edge of the flap and such that the flaps are overlapping; and   wherein the flaps attached to one side have their free edges facing clockwise and the flaps attached to the other side have their free edges facing counterclockwise.   
     
     
         2 . The double-sided flap disc of  claim 1 , wherein the grinder is a bench or pedestal grinder. 
     
     
         3 . The double-sided flap disc of  claim 1 , wherein the disc is spaced along the arbor with a gap of two inches or more from the body of the grinder. 
     
     
         4 . A method of using a mounted grinder, the grinder having a rotating arbor, comprising:
 attaching a double-sided flap disc onto the arbor, the double-sided flap disc having:   a carrier plate made from a planar rigid material and being round with a flat face on both sides;   wherein the carrier plate has a center hole suitable for use in mounting the disc on an arbor of the grinder;   on each face of the carrier plate, a series of abrasive flaps arranged around the outer perimeter of the carrier plate;   wherein each flap is attached to the carrier plate along a fixed edge of the flap that is opposing a free edge of the flap and such that the flaps are overlapping; and   wherein the flaps attached to one side have their free edges facing clockwise and the flaps attached to the other side have their free edges facing counterclockwise.   
     
     
         5 . The method of  claim 4 , wherein the grinder is a bench or pedestal grinder. 
     
     
         6 . The method of  claim 4 , wherein the attaching step is performed such that the disc is spaced along the arbor with a gap of two inches of more from the body of the grinder. 
     
     
         7 . A grinder, comprising:
 a grinder housing;   means for mounting the grinder on a platform;   an electric motor inside the housing;   an arbor driven by the motor such that it rotates;   a double-sided flap disc mounted on the arbor, the double-sided flap disc having:   a carrier plate made from a planar rigid material and being round with a flat face on both sides;   wherein the carrier plate has a center hole suitable for use in mounting the disc on an arbor of the grinder;   on each face of the carrier plate, a series of abrasive flaps arranged around the outer perimeter of the carrier plate;   wherein each flap is attached to the carrier plate along a fixed edge of the flap that is opposing a free edge of the flap and such that the flaps are overlapping; and   wherein the flaps attached to one side have their free edges facing clockwise and the flaps attached to the other side have their free edges facing counterclockwise.