# US 8,540,464 B2 · Deburring knife for deburring even and uneven hole edges > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,464 B2 - Document ID: US8540464B2 - Status: Granted - Kind: B2 - Application number: 12/555,297 - Filed: 2009-09-08 - Published: 2010-08-05 - Granted: 2013-09-24 - Earliest claimed: 2008-09-09 - Assignees: Heule, ULF - Applicants: Heinrich Heule - Inventors: Heinrich Heule - Web page: https://patentgrep.com/patent/US8540464B2 ## CPC - B23B 51/101: {Deburring tools (B23B51/103 takes precedence)} - B23B 2210/08: Tools comprising intermediary toolholders - B23B 2260/016: Bolts - Y10T 408/8583: with resiliently urged Tool - Y10T 408/865: Pivotable Tool - Y10T 408/89: Tool or Tool with support - Y10T 408/95: with tool-retaining means - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Deburring knife for deburring straight or nonround hole edges with a base body driven rotationally around its longitudinal axis, in which one or more bar blades are replaceably accepted into a swivel-mounted knife holder in a base body, by which the knife holder has at least one control recess located on its circumference, in which a spring component engages, which guides the rotation of the knife holder in the base body, characterized by the fact that for pivot bearing of the knife holder in the base body of the knife holder there are two drilled holes located across from one another vertically to the mounting hole of the bar blade, into each of which the end of a bearing bolt engages, whose other end goes into a transverse hole in the base body and serves to rotate the knife holder in the base body that one or more bar blades are thereby easily and replaceably mounted in the radial mounting hole in the knife holder, that at least one stop preventing axial displacement and one pullout safety device for security in the axial direction are in place for the bar blade. ## Claims ### Claim 1 Deburring tool for deburring straight or nonround hole edges with a base body driven rotationally around its longitudinal axis, in which one or more blades are replaceably accepted into a swivel-mounted blade holder in the base body, the blade holder having at least one control recess located on its circumference, in which a spring component engages, which guides the rotation of the blade holder in the base body, wherein for pivot bearing of the blade holder in the base body the blade holder has two drilled holes located across from one another on opposite sides of a mounting hole in the blade holder which receives the blade, into each of which the end of a bearing bolt engages, whose other end goes into a transverse hole in the base body and that one or more blades are thereby easily and replaceably mounted in the blade holder, at least one stop prevents axial displacement of the blade and one pullout safety device provides security in the axial direction for the blade. ### Claim 2 (depends on 1) Deburring tool according to claim 1, wherein the stop edge on the blade holder side is formed by a positioning bolt, which lies against an associated stop edge of the blade. ### Claim 3 (depends on 1, 2) Deburring tool according to one of the claims 1 or 2, wherein the axial pullout safety device is formed by a notch on the blade, in which the tip of a locking screw located on the side of the blade holder engages. ### Claim 4 (depends on 1, 2) Deburring tool according to one of the claims 1 or 2, wherein the pullout safety device is formed as an index ball prestressed under spring tension, which engages under pretension from the screw pressure spring into an associated notch on the underside of the blade. ### Claim 5 (depends on 2) Deburring tool according to claim 2, wherein the positioning bolt forms a high-load transfer axial safety stop for the blade, which on the one hand serves to provide rotation protection and on the other hand displacement protection for the blade in the mounting hole. ### Claim 6 (depends on 1, 2) Deburring tool according to one of the claims 1 or 2, wherein both bearing bolts are mounted securely against shifting in the associated transverse hole in the base body and engage on both sides in the associated drilled hole in the blade holder. ### Claim 7 (depends on 1, 2) Deburring tool according to one of the claims 1 or 2, wherein that the axial pullout safety device and the axial stop limit are combined into one part as a holding notch. ### Claim 8 (depends on 7) Deburring tool according to claim 7, wherein the part is formed as the holding notch is diagonally beveled in the direction of extraction in the blade, in which a spring engages in the transverse hole. ### Claim 9 (depends on 8) Deburring tool according to claim 8, wherein one flank of the holding notch is oriented vertically to the direction of extraction, while the other flank is oriented diagonally to the direction of extraction. ### Claim 10 Deburring tool according to claim through 8, wherein for replacement of the blade a movement is made in the direction of extraction and the central contact tongue of the spring glides along the right stop of the holding notch and is there diverted downward by spring deflection, by which it comes out of engagement with the holding notch. ### Claim 11 Deburring tool for deburring straight or nonround hole edges with a base body driven rotationally around its longitudinal axis, in which one or more blades are replaceably accepted into a swivel-mounted blade holder in the base body, the blade holder having at least one control recess located on its circumference, in which a spring component engages, which guides the rotation of the blade holder in the base body, wherein for pivot bearing of the blade holder in the base body the blade holder has two drilled holes located across from one another on opposite sides of a mounting hole in the blade holder which receives the blade, into each of which the end of a bearing bolt engages, whose other end goes into a transverse hole in the base body and that one or more blades are thereby easily and replaceably mounted in the blade holder, at least one stop prevents axial displacement of the blade and one pullout safety device provides security in the axial direction for the blade, wherein the pullout safety device is in the form of a spring pin, which is flexibly mounted in a transverse hole in the blade holder and engages in a holding notch on the blade under spring pretension. ### Claim 12 Deburring blade holder adapted to be pivotally mounted to and rotationally driven by a base body of a deburring tool, said blade holder further adapted to have at least one deburring blade removably mounted therein, said blade holder having at least one control recess located on a circumference of said blade holder, said control recess adapted to receive a spring therein to bias said blade holder to a deburring position, said blade holder having a mounting hole extending therein into which is received the deburring blade, said mounting hole configured so as to clamp the deburring blade in said blade holder. ### Claim 13 Deburring blade holder adapted to be pivotally mounted to and rotationally driven by a base body of a deburring tool, said blade holder further adapted to have at least one deburring blade removably mounted therein, said blade holder having at least one control recess located on a circumference of said blade holder, said control recess adapted to receive a spring therein to bias said blade holder to a deburring position, said blade holder having a first mounting hole extending therein into which is received the deburring blade, said first mounting hole having a flexible clamping gap to clamp the deburring blade in said blade holder. ### Claim 14 (depends on 13) Deburring blade holder according to claim 13 wherein said clamping gap, which is open on one side, spans from one side of said blade holder in the form of a longitudinal slot, which passes over a second mounting hole in said blade holder for receiving a bearing bolt for mounting said blade holder to the base body and intersects said second mounting hole. ### Claim 15 (depends on 13, 14) Deburring blade holder according to one of the claims 13 or 14 wherein said blade holder further includes a rear recess relative to said clamping gap whereby a spreading tool can be installed to spread said clamping gap to ease insertion of the deburring blade into said first mounting hole so as to enlarge the diameter of said first mounting hole and thereby enable smooth, secure insertion of the deburring blade.