Rotating back up abrasive disc assembly
Assignee3M Innovative Properties Company
InventorsPeter J. Fritz, Robert G. Saunier, Aleck Block
Life of this patent
Estimating the term…
Abstract
A holder for an abrasive disc allows for a quick manual change of the abrasive disc. The holder including an uncoupling mechanism that in turn includes a handle comprising a pin and an adjacent hub comprising a partial annular channel. The handle and hub have a limited rotational engagement wherein the pin travels in the channel. When an operator desires to replace an abrasive disc, the operator grasps the handle with one hand and rotates the disc, face plate, and hub, together as a unit, with the other hand. This counter-rotation breaks the tight attachment of the disc on the shaft of the finishing tool, so that disc can be easily unthreaded from the shaft.
Claims20
A holder for supporting an abrasive disc on a tool shaft, the holder comprising:
- an annular internally threaded central insert threadably engaging the shaft;
- a handle concentrically surrounding and in fixed rotational engagement with the central insert;
- a hub concentrically surrounding the central insert, abutting the handle, and rotationally engaged to the handle;
- a pin disposed on a first face of at least one of the handle or hub;
- a discontinuous channel disposed on a second face of the handle or hub, the channel opposing the pin, so that the pin engages the channel and travels within the channel as the handle and hub are rotated with respect to each other;
- and
- a faceplate concentrically surrounding the central insert, abutting the hub, and removably engaged to the hub.
A holder for supporting an abrasive disc on a tool shaft, the abrasive disc having a centrally located nut, the holder comprising:
- an annular internally threaded central insert threadably engaging the shaft and spaced from the nut of the abrasive disc;
- a handle concentrically surrounding and in fixed rotational engagement with the central insert;
- a hub concentrically surrounding the central insert, abutting the handle, and rotationally engaged to the handle;
- the hub including a tab;
- a pin disposed on a face of the handle or the hub;
- a discontinuous channel disposed on a face of the handle or the hub, the channel opposing the pin, so that the pin engages the channel and travels within the channel as the handle and hub are rotated with respect to each other;
- a flange disposed on an outer surface of the central insert;
- a recess disposed on an inner surface of the hub,
- wherein the flange of the central insert engages the recess of the hub to retain the hub against the handle;
- and
- a faceplate concentrically surrounding the central insert, abutting the hub, and removably engaged to the hub, the faceplate having a recess,
- wherein the tab of the hub engages the recess of the faceplate to form an integral faceplate and hub assembly.
Dependencies are inferred from the claim text.