Vacuum sander
OwnerMiksa Martoninventor
Life of this patent
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Abstract
This invention is directed to a vacuum sanding device. More particularly, the invention is directed to a vacuum sanding device that has one or more vacuum openings in the central area of the sanding disc, or, one or more vacuum openings located around the periphery of the sanding disc, or a combination of one or more openings in the central area of the sanding disc and one or more openings located around the periphery of the sanding disc.
Claims15
A vacuum sanding apparatus comprising in combination, a disc shaped backup pad for connection to driving means and having an abrasive sanding disc detachably secured thereto, a vacuum housing mounted on the upper surface of the backup pad;
- a plurality of apertures in the operative surface of the abrasive disc and being in registry with apertures in the bottom surface of the backup pad, all said apertures being in communication with the interior of said vacuum housing;
- means on the housing for adjusting the amount of vacuum created therein;
- said housing being connectable to the driving means and being adapted to receive the same centrally in the housing;
- and a resilient collar intermediate the peripheral lower edge of the housing and the upper surface of the backup pad whereby the housing may flex relative to the plane of the backup pad.
A vacuum housing for use on a vacuum sanding device of the type driving a backup pad with an abrasive disc thereon, said housing comprising:
- a. a cylindrical body portion having a central aperture in the top thereof for passage of the sanding device driving means;
- b. an outlet for connection to vacuum applying means;
- c. a peripheral, resilient collar on the lower end of the body portion for flexible engagement with the upper surface of the backup pad;
- and
- d. means on the body portion for adjusting the amount of air going through said vacuum outlet.
A disc shaped backup pad for use in a vacuum sanding device, said pad comprising:
- a. upper and lower portions with a first group of apertures extending upwardly through the pad normal thereto;
- b. said lower portion being a soft, resilient material adapted to conform to work surfaces;
- c. said upper portion being bonded to said lower portion and being of relatively firm material;
- d. the outer periphery of said pad tapering inwardly and upwardly and including a peripheral groove for receiving a resilient snap ring therein;
- e. said firm upper portion including a central boss for connection, a driving means and a plurality of ribs extending radially outwardly from the boss to an upstanding peripheral lip defining with said radial ribs, a plurality of vacuum chambers;
- f. each of said first group of normally extending apertures terminating at its upper end in one of said chambers;
- and
- g. a plurality of apertures in the tapered side wall, each extending inwardly to terminate in one of said chambers.
An abrasive disc for mounting on a backup pad of a vacuum sander, said disc comprising an abrasive central portion and a concentric, flexible skirt, larger in diameter than said abrasive central portion for connection to the sidewall of said backup pad;
- a plurality of apertures in the abrasive central portion for registry with like apertures in the bottom of said backup pad;
- and a plurality of openings in the flexible skirt for registry with apertures in the sidewall of the pad when the skirt is secured thereon.
A loader for use in affixing an abrasive sanding disc to a backup pad of a vacuum sander comprising
- a. a loader housing of circular configuration having a bottom wall and a peripheral sidewall;
- b. a vertical centering pin mounted in the centre of the bottom wall of the loader housing,
- c. a spring means concentrically positioned in association with the centering pin, and
- d. a centering plate mounted on the spring means and having a surface contour conforming the surface contour of the bottom of a pad and paper being loader therein.
Dependencies are inferred from the claim text.