Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1992-08-05
1994-02-08
Rose, Robert A.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51180, 51273, 51170R, B24D 1504
Patent
active
052839885
ABSTRACT:
Current manual vacuum sanders do not adequately capture dust from around the edges of the sander. The present invention provides a back-up pad for a vacuum hand sanding device for sanding a working surface, where the device is of the type comprising a tailpiece for connecting a source of vacuum, a base for attaching a back-up pad and screw clamps for releasably attaching an abrasive, air-permeable sheet. The back-up pad comprises an inner recessed lower surface, apertures formed in the inner recessed lower surface for communicating with the vacuum source, a raised perimeter having an outer edge and extending downwardly from the inner recessed lower surface thereby forming a chamber communicating with said apertures between a working surface and the inner recessed lower surface when the sander is placed on the working surface, wherein the raised perimeter is provided with a plurality of grooves extending from the outer edge to the inner chamber, and a plurality of support surfaces extending downwardly from the inner surface a distance equal to the height of the raised perimeter. The tailpiece provides for adjustment of the vacuum pressure to the working surface by varying the size of an opening to the sander handle interior.
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Reichenbach Bryan
Rose Robert A.
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