Abrasive apparatus

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof


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51377, B24D 1700




An abrasive disc includes a sheet having abrasive particles on one surface of the sheet. A fastener has a flat flange portion which is adhered to the sheet. Coupling portions on the fastener extend in a transverse direction from the flange portion and legs extends from the free ends of the coupling portion at an angle to the coupling portions. This angle may be between 20.degree. and 75.degree.. The fastener is formed from a sheet of metal which includes the flange portion, the coupling portions and the legs being formed from the portion of the sheet interior to the flange portion. The fastener is constructed to be coupled to a drive member. The drive member includes a housing having a socket. Detent portions are raised in the socket and are provided with detent surfaces. A shaft extends through the center of the socket and has a recess. In the coupled relationship of the disc and the drive member, the coupling portions on the fastener abut the detent surfaces so that the detent surfaces stop the coupling portions from rotating relative to the drive member. In one embodiment, this stopping action is substantially radial and, in another embodiment, this force is substantially tangential. The legs are disposed in the recess in the shaft so that the legs exerts an axial force on the shaft and thus prevent axial displacement of the disc relative to the drive member.

patent: 3270467 (1966-09-01), Block et al.
patent: 4245438 (1981-01-01), van Buren, Jr.


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