# US 8,740,122 B2 · Roller press grid armoring comprising ring-shaped bolts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,740,122 B2 - Document ID: US8740122B2 - Status: Granted - Kind: B2 - Application number: 13/390,479 - Filed: 2010-08-12 - Published: 2012-06-07 - Granted: 2014-06-03 - Earliest claimed: 2009-08-17 - Assignees: KHD Humboldt Wedag GmbH - Applicants: Dieter Brendler - Inventors: Dieter Brendler - Web page: https://patentgrep.com/patent/US8740122B2 ## CPC - B02C 4/305: {Wear resistant rollers} - Y10T 29/49718: Repairing - Y10T 29/49817: with other than ancillary treating or assembling - B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02}) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A grinding roller for the high-pressure comminution of granular milling material, having a reinforcement with hard bodies which protrude from the surface of the main part of the grinding roller. At least some of the hard bodies have a continuous recess, wherein the recess extends in the radial direction of the grinding roller. Refurbishing the surface of the grinding roller is substantially simplified by the continuous recess. ## Claims ### Claim 1 A grinding roll having a cylindrical shape with a central axis of rotation for the high-pressure comminution of granular milling material, having a reinforcement with a plurality of hard bodies which protrude radially from a cylindrical surface of a main part of the grinding roll, comprising at least some of the hard bodies having a continuous recess extending therethrough, wherein the recess extends in a radial direction of the grinding roll and wherein a ratio of radial height to width of the hard bodies with the continuous recess is 1.5 or less, and wherein the hard bodies with a continuous recess each have, in the radial direction of the grinding roll, in addition to a main profile of the continuous recess of a particular geometric shape, a secondary profile of the continuous recess, wherein the secondary profile comprises at least one round or pointed bulge to at least one of the inside and outside of the geometric shape of the continuous recess, a chamfer, and a rounding on edges of the hard body, the secondary profile of the continuous recess being arranged one of symmetrically and asymmetrically. ### Claim 2 (depends on 1) The grinding roll as claimed in claim 1, wherein the hard bodies with the continuous recess have a shape of a general cylinder with a bore. ### Claim 3 (depends on 2) The grinding roll as claimed in claim 2, wherein the hard bodies with the continuous recess have the shape of one of a hollow circular cylinder, a hollow prism and a hollow cylinder with an elliptical base. ### Claim 4 (depends on 1) The grinding roll as claimed in claim 1, wherein the hard bodies with the continuous recess have a shape of an oblique general cylinder with a bore. ### Claim 5 (depends on 4) The grinding roll as claimed in claim 4, wherein the hard bodies with the continuous recess have the shape of one of an oblique hollow circular cylinder, an oblique hollow prism and an oblique hollow cylinder with an elliptical base. ### Claim 6 (depends on 1) The grinding roll as claimed in claim 1, wherein the hard bodies with the continuous recess are one of symmetrically and asymmetrically shaped. ### Claim 7 (depends on 1) The grinding roll as claimed in claim 1, wherein the continuous recess in cross section has one of a circular profile, an elliptical profile, and a polygonal profile. ### Claim 8 (depends on 1) The grinding roll as claimed in claim 1, wherein the continuous recess has in a lateral cross section, in addition to a main profile of a particular geometric shape, a secondary profile, wherein the secondary profile comprises at least one round or pointed bulge extending to the lateral inside and/or outside of the geometric shape of the main profile and is arranged one of symmetrically or asymmetrically. ### Claim 9 (depends on 1) The grinding roll as claimed in claim 1, wherein the continuous recess is at least partially filled with a material used in the main part of the grinding roll. ### Claim 10 (depends on 1) The grinding roll as claimed in claim 1, wherein the continuous recess is at least partially filled with a form-fitting body. ### Claim 11 A method for replacing a reinforcement comprising hard bodies protruding radially from a cylindrical surface of a main part of a grinding roll, the hard bodies having a continuous recess extending therethrough in a radial direction of the grinding roll, comprising the following steps: removing any material present in the continuous recess of the hard body, extracting the hard body from bores in the grinding roll with a tool which wedges in the continuous recess of the hard bodies or grips the hard bodies therein, restoring the shape of the main part of the grinding roll by machine cutting, wherein the main part of the grinding roll is slightly reduced in size, if need be deepening the bores for the reception of the hard bodies, inserting new or still usable, used hard bodies, wherein the hard bodies with a continuous recess each have, in the radial direction of the grinding roll, in addition to a main profile of the continuous recess of a particular geometric shape, a secondary profile of the continuous recess, wherein the secondary profile comprises at least one round or pointed bulge to at least one of the inside and outside of the geometric shape of the continuous recess, a chamfer, and a rounding on edges of the hard body, the secondary profile being arranged one of symmetrically and asymmetrically, filling the continuous recess with a form-fitting body. ### Claim 12 (depends on 11) The method as claimed in claim 11, including the step of twisting the hard body in its bore.