Patent ID: 6893335

Claim:
A reusable quick change mount for use with abrasive devices ( 14 ) having first ( 13 ) and second ( 17 ) surfaces and having a central opening ( 15 ) therethrough and adapted for rotation by a rotary power tool carrying threads ( 70 ), said mount comprising: (a) a nut ( 12 ) having a barrel ( 20 ) carrying threads formatting with the threads carried by said power tool and having an outer surface ( 36 ), said barrel having first ( 24 ) and second ends; (b) a first flange ( 22 ) extending radially outward at said first end of said barrel; (c) said barrel being adapted to be received in said central opening of said abrasive device with a portion of said flange engaging said first surface thereof and a portion of said barrel including said second end extending beyond said second surface thereof; (d) said outer surface of said barrel being threaded ( 38 ) over at least that portion extending beyond said second surface; (e) a support unit ( 10 ) having a body ( 42 ) defining a first bore ( 48 ) centrally disposed therethrough, said first bore having threads ( 49 ) for mating with the threads on said outer surface of said barrel; and (f) said threads on said outer surface of said barrel and in said first bore, when engaged, operate to capture said abrasive device between said first flange and said support unit and operatively clamp said abrasive device for rotation by said power tool, the position of said support unit with respect to said nut, after assembly by hand on said abrasive device, remaining substantially unchanged during use thereby enabling removal of said support unit from said nut by hand after use to replace said abrasive device.