EP0855257A3 - Drill with cylindrical head - Google Patents

Drill with cylindrical head Download PDF

Info

Publication number
EP0855257A3
EP0855257A3 EP97122890A EP97122890A EP0855257A3 EP 0855257 A3 EP0855257 A3 EP 0855257A3 EP 97122890 A EP97122890 A EP 97122890A EP 97122890 A EP97122890 A EP 97122890A EP 0855257 A3 EP0855257 A3 EP 0855257A3
Authority
EP
European Patent Office
Prior art keywords
drill
head
edge
drilling
main blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97122890A
Other languages
German (de)
French (fr)
Other versions
EP0855257B1 (en
EP0855257A2 (en
Inventor
Thomas Pomp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Famag-Werkzeugfabrik Friedrich Aug Muehlhoff
Original Assignee
Famag-Werkzeugfabrik Friedrich Aug Muehlhoff
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Famag-Werkzeugfabrik Friedrich Aug Muehlhoff filed Critical Famag-Werkzeugfabrik Friedrich Aug Muehlhoff
Publication of EP0855257A2 publication Critical patent/EP0855257A2/en
Publication of EP0855257A3 publication Critical patent/EP0855257A3/en
Application granted granted Critical
Publication of EP0855257B1 publication Critical patent/EP0855257B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G15/00—Boring or turning tools; Augers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/901—Having axially extending peripheral cutting spur
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced
    • Y10T408/9065—Axially spaced with central lead

Abstract

The drill's (1) main blade (4) with centring point (5) has free-cut surfaces (11) and extends over the entire circular cross-section of the drill-head (3). Slanting drilling-dust ducts (7) penetrate the drill head and are open towards the edge next to the main blade. Each end of the main blade adjoins a pre-cutting edge (8) coinciding with the peripheral line of the drill-head. The pre-cutting edge extends as far as the edge of the outer drilling-duct, and is formed by the edge of a cylindrical outer wall (6) of the drilling head. The otherwise smooth outer casing wall is broken up by radial outward bulges (13) interspersed by grooves (12) sloping towards the axis or parallel with the axis.
EP97122890A 1997-01-24 1997-12-24 Drill with cylindrical head Expired - Lifetime EP0855257B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702423 1997-01-24
DE19702423A DE19702423B4 (en) 1997-01-24 1997-01-24 Cylinder head drills

Publications (3)

Publication Number Publication Date
EP0855257A2 EP0855257A2 (en) 1998-07-29
EP0855257A3 true EP0855257A3 (en) 1999-07-14
EP0855257B1 EP0855257B1 (en) 2000-08-16

Family

ID=7818209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97122890A Expired - Lifetime EP0855257B1 (en) 1997-01-24 1997-12-24 Drill with cylindrical head

Country Status (7)

Country Link
US (1) US5975814A (en)
EP (1) EP0855257B1 (en)
AT (1) ATE195457T1 (en)
CA (1) CA2227820C (en)
DE (2) DE19702423B4 (en)
DK (1) DK0855257T3 (en)
ES (1) ES2151221T3 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT4227U1 (en) * 2000-03-03 2001-04-25 Johann Eberhard Ges M B H DRILL
US6644899B2 (en) 2000-03-03 2003-11-11 Johann Eberhard Gesellschaft M.B.H. Drill bit and process of producing a drill bit with improved cutting edges
WO2001064407A1 (en) * 2000-03-03 2001-09-07 Johann Eberhard Gesellschaft M.B.H. Drill, especially a forstner bit or a multi-spur machine bit
AT409600B (en) * 2000-03-03 2002-09-25 Johann Eberhard Ges M B H Drill has drill shaft and cutter head with central mandrel, two end cutter blades, chip space defined by hollow cylindrical wall, with peripheral cutter blade.
US6354774B1 (en) 2000-04-27 2002-03-12 The Mibro Group Forstner drill bit
US6612788B2 (en) 2001-03-30 2003-09-02 Black & Decker Inc. Self-feed wood bit
US6874978B2 (en) * 2002-03-25 2005-04-05 Milwaukee Electric Tool Corporation Boring bit and methods for manufacturing boring bits
US20060216123A1 (en) * 2005-03-24 2006-09-28 Burdick Brett W Flat bit sphere named the V-back paddlesphere bit
US7909547B2 (en) 2005-10-08 2011-03-22 Milwaukee Electric Tool Corporation Replaceable tip for a bit or auger bit
US7648316B2 (en) 2006-01-26 2010-01-19 Wolfcraft, Gmbh Forstner drill bit
DE102007002530B4 (en) * 2006-01-26 2016-03-03 Wolfcraft Gmbh Forstnerbohrer
CN101096056B (en) * 2006-03-02 2013-06-19 密尔沃基电动工具公司 Cutting tool
US8328477B2 (en) 2006-03-02 2012-12-11 Milwaukee Electric Tool Corporation Cutting tool
DE102006039426B4 (en) * 2006-08-23 2008-08-28 Horst Miebach Gmbh Holzbohrer
US8070398B2 (en) * 2008-02-19 2011-12-06 Irwin Industrial Tool Company Multi-blade self feed bit
US8727679B2 (en) * 2009-09-10 2014-05-20 Techtronic Power Tools Technology Limited Wood boring bit
CN205218137U (en) 2013-02-01 2016-05-11 米沃奇电动工具公司 Spiral bit with can replace drill bit
US20160345619A1 (en) * 2014-12-02 2016-12-01 Monarch Media Llc. Coconut removal device and method therefor
US11317647B2 (en) * 2014-12-02 2022-05-03 Monarch Media, Llc Coconut water removal device and method therefor
DE202016001386U1 (en) 2016-03-04 2016-03-17 FAMAG-Werkzeugfabrik GmbH & Co. KG Cylinder head drills
ES2939595T3 (en) 2016-10-07 2023-04-25 Mapal Fabrik Fuer Praez Dr Kress Kg metal punch tool
CN108972901A (en) * 2018-07-17 2018-12-11 温州市人民医院 A kind of wall opening apparatus
NL2024154B1 (en) 2019-11-04 2021-07-19 Colt Tech Gmbh Cylindrical head boring tool, in particular a Forstner bit
DE102022101647A1 (en) 2022-01-25 2023-07-27 KSB SE & Co. KGaA Rotating carrier tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842423A1 (en) * 1978-09-29 1980-04-17 Heinrich Reineke Mandrel-mounted trepanning tool - has cutter bits clamped in tool and replaceable using only screwdriver
DE4115030C1 (en) * 1991-05-08 1992-06-25 Famag-Werkzeugfabrik Friedr. Aug. Muehlhoff, 5630 Remscheid, De
US5499667A (en) * 1994-06-21 1996-03-19 Nakanishi Construction Company Drill/cutting bit, and method of making structural joint
DE29701161U1 (en) * 1997-01-24 1998-05-28 Famag Werkzeugfabrik Friedr Au Cylinder head drill

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613710A (en) * 1951-08-02 1952-10-14 Cleveland Twist Drill Co Machine bit for drilling wood
DE2005775A1 (en) * 1970-02-09 1971-08-19 Wolfcraft Robert Wolff Kg, 5441 Weibern Cylinder head drill
US4090807A (en) * 1976-09-20 1978-05-23 Stewart Arthur A Axially supported boring tool and method for making same
SE454757B (en) * 1984-08-08 1988-05-30 Lars Ove Jansson INSTALLATION DRILL
DE3719758A1 (en) * 1987-06-15 1989-01-05 Weber Gustav Schlagring Drill (bit)
DE3824502A1 (en) * 1988-07-20 1990-01-25 Hilti Ag HOLLOW DRILLING TOOL
US5193951A (en) * 1988-08-24 1993-03-16 Vermont American Corporation Wood-drilling bit
DE19602903A1 (en) * 1995-04-27 1996-10-31 Hawera Probst Kg Hartmetall Drill bit tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842423A1 (en) * 1978-09-29 1980-04-17 Heinrich Reineke Mandrel-mounted trepanning tool - has cutter bits clamped in tool and replaceable using only screwdriver
DE4115030C1 (en) * 1991-05-08 1992-06-25 Famag-Werkzeugfabrik Friedr. Aug. Muehlhoff, 5630 Remscheid, De
US5499667A (en) * 1994-06-21 1996-03-19 Nakanishi Construction Company Drill/cutting bit, and method of making structural joint
DE29701161U1 (en) * 1997-01-24 1998-05-28 Famag Werkzeugfabrik Friedr Au Cylinder head drill

Also Published As

Publication number Publication date
EP0855257B1 (en) 2000-08-16
US5975814A (en) 1999-11-02
CA2227820C (en) 2001-10-23
DE19702423A1 (en) 1998-08-06
DE19702423B4 (en) 2009-11-12
EP0855257A2 (en) 1998-07-29
DE59702198D1 (en) 2000-09-21
CA2227820A1 (en) 1998-07-24
ATE195457T1 (en) 2000-09-15
ES2151221T3 (en) 2000-12-16
DK0855257T3 (en) 2000-12-18

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