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Title: Abrasive member of bonded aggregates in an elastomeric matrix
Claims: What is claimed is: 1. A shaped, flexible, resilient abrasive member essentially consisting of a matrix of elastomeric material and a plurality of aggregates embedded in said matrix in spaced relationship and bonded to each other by said material, each aggregate essentially consisting of a multiplicity of grains of abrasive material and of a bonding agent more rigid than said elastomeric material and bonding said grains to each other, said matrix having a Shore A hardness of 75 to 20, and said aggregates having a Shore D hardness of at least 65. 2. A member as set forth in claim 1, wherein the size of each aggregate is between 2 mm and 10 mm. 3. A member as set forth in claim 2, wherein said size is at least 4 mm. 4. A member as set forth in claim 2, wherein said member is an abrasive wheel. 5. A member as set forth in claim 4, wherein the weight ratio of said matrix to said aggregates is between 0.5:1 and 1.25:1. 6. A member as set forth in claim 5, wherein the weight ratio of said grains to said bonding agent in said aggregates is between 20:1 and 3:1. 7. A member as set forth in claim 2, wherein said elastomeric material essentially consists of a synthetic rubber. 8. A member as set forth in claim 7, wherein said bonding agent essentially consists of a phenol-formaldehyde resin. 9. A member as set forth in claim 2, wherein the size of said grains is not greater than 20 grit. Other info: Inventors: Elbel, Karl (Pforzheim, DT) Wolfinger, Kurt (Pforzheim, DT) Application Number: 585465 Filing Date: 1975-06-10 Publication_date: 1976-09-28 Assignee: ROC A.G. (Zug, CH) Primary Class(es): 51/295 51/298, 51/299 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Arnold, Donald J. Assistant Examiner: Attorney: Berman; Hans, Kelman; Kurt |
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