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US 11,697,186 B2Granted
Abrasive article
AssigneeRobert Bosch GmbH
InventorJosef Breitenmoser
Life of this patent
Estimating the term…
Abstract
An abrasive article, in particular a coated abrasive disc, includes a plurality of holes which are arranged in a hole pattern. The density of holes decreases from an inner region of the hole pattern to an outer region of the hole pattern. At least one hole in the hole pattern is designed as an elongated hole.
Claims20
An abrasive article comprising:
- a plurality of holes arranged in a hole pattern in which an areal hole density decreases from an inner region of the hole pattern, which is defined between a center of the abrasive article and an inner region boundary, to an outer region of the hole pattern, which is defined between the inner region boundary and an outer edge of the abrasive article, wherein the hole pattern defines at least one spiral pattern along which at least a portion of the plurality of holes of the hole pattern are arranged, and wherein a first hole density in the inner region of the hole pattern is between 7.5% a nd 16.0% of an overall area of the inner region.
An abrasive article comprising:
- a plurality of holes arranged in a hole pattern in which an areal hole density decreases from an inner region of the hole pattern, which is defined between a center of the abrasive article and an inner region boundary, to an outer region of the hole pattern, which is defined between the inner region boundary and an outer edge of the abrasive article, wherein a ratio of a first hole density in the inner region to a second hole density in the outer region is between 1.9 and 6.9.
An abrasive article comprising:
- a plurality of holes arranged in a hole pattern in which an areal hole density decreases from an inner region of the hole pattern, which is defined between a center of the abrasive article and an inner region boundary, to an outer region of the hole pattern, which is defined between the inner region boundary and an outer edge of the abrasive article, wherein the plurality of holes of the hole pattern comprises at least one elongated hole, and wherein at least one of:
- (i) a first elongation of a first elongated hole of the at least one elongated hole is different from a second elongation of a second elongated hole of the at least one elongated hole, and (ii) a first radius of the first elongated hole is different from a second radius of the second elongated hole.
Dependencies are inferred from the claim text.