# US 6,293,481 B1 · Attachment arrangement facilitating rapid replacement of strikers of a wood comminuting rotor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,293,481 B1 - Document ID: US6293481B1 - Status: Granted - Kind: B1 - Application number: 09/447,976 - Filed: 1999-11-23 - Granted: 2001-09-25 - Earliest claimed: 1999-11-23 - Inventors: Anders T. Ragnarsson - Web page: https://patentgrep.com/patent/US6293481B1 ## CPC - B02C 18/184: {with peripherally arranged demountable cutting tips or elements} - B02C 18/146: {with a rotor comprising a plurality of axially contiguous disc-like segments each having at least one radially extending cutting element} - B27L 11/005: {Tools therefor} - 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}) - B27L: REMOVING BARK OR VESTIGES OF BRANCHES (forestry A01G); SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER ## Abstract A comminuting striker and retainer for mounting to a striker mounting face of a comminuting rotor by bolts in which the striker is located by a projection on the retainer which can be disengaged from the striker by loosening the bolts without removing the bolts and retainer from the rotor, the striker having a slot which then allows the striker to be slid laterally from the bolts for removal from the rotor. ## Claims ### Claim 1 A comminuting striker for mounting on a rotor of a comminuting apparatus, comprising a body having opposed first and second ends, the first end of which defines a cutting edge and the second end of which defines a slot extending toward the first end, the slot being sized to provide passage for bolts used to attach the striker to a striker mounting face of the rotor and being shaped to allow the striker to be removed from the rotor without removing the bolts from the rotor, wherein the slot is an elongate slot having parallel walls in which are formed opposite recesses able to accommodate a projection used to retain the striker on the rotor. ### Claim 2 (depends on 1) The striker of claim 1, wherein the second end defines sloping end faces extending outwardly from the slot and toward said first end. ### Claim 3 (depends on 1) The striker of claim 1 in combination with a retainer to clamp the striker against the mounting face by means of the bolts, the retainer defining the projection to cooperate with the opposed recesses to retain the striker on the rotor while allowing the striker to be removed from the rotor upon loosening of the bolts without the retainer and bolts being removed from the rotor. ### Claim 4 (depends on 3) The combination of claim 3, wherein the opposed recesses are rectangular and the projection has a rectangular transverse cross-section to be received closely within the opposed recesses. ### Claim 5 (depends on 1) The striker of claim 1, wherein the second end defines sloping end faces extending outwardly from the slot and toward said first end, in combination with a retainer to clamp the striker against the mounting face by means of the bolts, the retainer defining the projection to cooperate with the opposed recesses to retain the striker on the rotor while allowing the striker to be removed from the rotor upon loosening of the bolts without the retainer and bolts being removed from the rotor; and wherein the retainer has a flange defining slopping faces to cooperate with the sloping end faces of the striker, whereby when the striker is clamped to the striker mounting face by the retainer, force applied radially inwardly of the rotor will force the sloping faces and sloping end faces to tend to close the parallel faces of the slot together. ### Claim 6 (depends on 4) The combination of claim 4, wherein the retainer defines at least two threaded holes to receive a threaded end of the bolts and the projection is located between these threaded holes. ### Claim 7 (depends on 1) The striker of claim 1, wherein the cutting edge is offset laterally relative to the slot and projects laterally from a side of the striker, whereby strikers may be mounted on the rotor with alternating offsets to provide cutting overlap of the cutting edges during rotation of the rotor. ### Claim 8 A method facilitating replacement of a striker of a comminuting rotor in which the striker is clamped to a mounting face of the rotor by bolts, when tight, in engagement with the rotor and a retainer with the striker held in place by a projection on the retainer engaging a cooperating opening in the striker, comprising the step of: a) providing a slot in the striker to permit movement of the striker laterally of the bolts; b) loosening the bolts sufficiently, without the removal of the bolts and retainer from the rotor, to permit the projection to disengage from the opening; and c) sliding the slot of the striker laterally from the bolts to remove the striker from the rotor. ### Claim 9 (depends on 8) The method of claim 8 comprising replacing the striker by reversing the steps a), b) and c).