Expendable unitary quick mount abrasive discs and support pad therefor

a technology of abrasive discs and support pads, which is applied in the direction of gear teeth, manufacturing tools, gear teeth, etc., can solve the problems of excessive downtime necessitated by such disc replacement, difficulty in removing the nuts in order to replace the disc, and damage to the workpi

Inactive Publication Date: 2009-04-23
MACKAY JOSEPH HARTLEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first of these is that by engagement of the rotating finishing disc against the work piece a large amount of torque is imported to the hub which tends to tighten the nut onto the threaded shaft of the power tool making it quite difficult to remove the nut in order to replace the disc after it is spent and usually involves the use of tools.
As a result, when considering the number of power tools which may be in use at any given time, there is an excessive amount of downtime necessitated by such disc replacement.
A second disadvantage is that the flange of the nut extends above the

Method used

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  • Expendable unitary quick mount abrasive discs and support pad therefor
  • Expendable unitary quick mount abrasive discs and support pad therefor
  • Expendable unitary quick mount abrasive discs and support pad therefor

Examples

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Embodiment Construction

[0024]The present invention provides an abrasive finishing disc having a fastener affixed thereto in such a manner that the abrasive finishing disc forms a depressed center such that the flange which holds the abrasive disc to a support pad is disposed completely below the surface of the abrasive finishing material which forms a part of the abrasive disc thereby maximizing the amount of surface area which is usable. The abrasive discs may be made of coated cloth or fiber or non-woven three dimensional fibrous abrasive material as is taught in U.S. Pat. No. 5,858,140 or such material having a reinforcing scrim as taught in U.S. Pat. No. 3,688,453. The fastener device includes a threaded shaft having male or female threads for attachment to a support pad. The support pad includes a depressed center area which cooperates to receive the depressed portion on the abrasive disc so that when the disc is fastened in place for use on the support pad, the fastener flange remains disposed below...

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PUM

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Abstract

The combination of an abrasive finishing device and a support member therefor. The support member includes a body having a threaded central opening with a flange at one end thereof. A fastening member having a threaded shaft and flange is permanently affixed to the abrasive finishing article by a resiliently deformable retainer press fitted over the threads on the shaft in such a manner that the flange on the fastening member is disposed entirely below the working surface of the abrasive finishing device. The retainer is a washer shaped member having an inner diameter which is less than the outer diameter of the threaded shaft on the fastening member and grips the thread on the shaft.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority of U.S. Provisional Patent Application No. 61 / 003,102 filed on Nov. 13, 2007, and the disclosure thereof is incorporated herein by reference and is a continuation in part of U.S. application Ser. No. 11 / 908,491 filed Sep. 12, 2007.FIELD OF THE INVENTION[0002]This invention relates generally to abrasive finishing articles and, more particularly, to the combination of an abrasive disc support pad and a disposable abrasive finishing disc in which the securing member affixed to the disposable abrasive finishing disc is entirely below the working surface of abrasive finishing particles contained on the abrasive disc.BACKGROUND OF THE INVENTION[0003]In the use of rotatably driven abrasive finishing articles and particularly coated abrasive finishing articles and non-woven fibrous abrasive material, such abrasive finishing articles are adapted for use on a wide range of air and electric powered tools. Traditional...

Claims

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Application Information

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IPC IPC(8): B24B23/02
CPCB24B45/006B24D7/16B24D5/16
Inventor MACKAY, JOSEPH HARTLEY
Owner MACKAY JOSEPH HARTLEY
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