ATE408748T1 - Werkzeughalterblock und darin gehaltener presssitz - Google Patents

Werkzeughalterblock und darin gehaltener presssitz

Info

Publication number
ATE408748T1
ATE408748T1 AT06101668T AT06101668T ATE408748T1 AT E408748 T1 ATE408748 T1 AT E408748T1 AT 06101668 T AT06101668 T AT 06101668T AT 06101668 T AT06101668 T AT 06101668T AT E408748 T1 ATE408748 T1 AT E408748T1
Authority
AT
Austria
Prior art keywords
shank
surface section
rear ends
holder block
flange
Prior art date
Application number
AT06101668T
Other languages
English (en)
Inventor
Stephen C Stehney
Original Assignee
Sandvik Intellectual Property
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 Sandvik Intellectual Property filed Critical Sandvik Intellectual Property
Application granted granted Critical
Publication of ATE408748T1 publication Critical patent/ATE408748T1/de

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Drilling Tools (AREA)
  • Gripping On Spindles (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Wire Bonding (AREA)
AT06101668T 2005-02-18 2006-02-14 Werkzeughalterblock und darin gehaltener presssitz ATE408748T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/061,551 US7234782B2 (en) 2005-02-18 2005-02-18 Tool holder block and sleeve retained therein by interference fit

Publications (1)

Publication Number Publication Date
ATE408748T1 true ATE408748T1 (de) 2008-10-15

Family

ID=36141825

Family Applications (2)

Application Number Title Priority Date Filing Date
AT08104288T ATE553283T1 (de) 2005-02-18 2006-02-14 Werkzeughalterblock und durch presssitz darin gehaltene hülse
AT06101668T ATE408748T1 (de) 2005-02-18 2006-02-14 Werkzeughalterblock und darin gehaltener presssitz

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT08104288T ATE553283T1 (de) 2005-02-18 2006-02-14 Werkzeughalterblock und durch presssitz darin gehaltene hülse

Country Status (10)

Country Link
US (2) US7234782B2 (de)
EP (2) EP1956187B1 (de)
CN (1) CN1828015B (de)
AT (2) ATE553283T1 (de)
AU (1) AU2006200642B9 (de)
CA (1) CA2535598C (de)
DE (1) DE602006002761D1 (de)
GB (1) GB2423319B (de)
MX (1) MXPA06001935A (de)
NO (1) NO20060765L (de)

Families Citing this family (92)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8190877B2 (en) * 2005-07-05 2012-05-29 Viasat, Inc. Trusted cryptographic processor
DE102006029300B3 (de) * 2006-06-23 2007-11-29 Betek Bergbau- Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg Rundschaftmeißel
US8292372B2 (en) * 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8033616B2 (en) 2006-08-11 2011-10-11 Schlumberger Technology Corporation Braze thickness control
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US7637574B2 (en) 2006-08-11 2009-12-29 Hall David R Pick assembly
US8485609B2 (en) * 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US8123302B2 (en) * 2006-08-11 2012-02-28 Schlumberger Technology Corporation Impact tool
US7669674B2 (en) 2006-08-11 2010-03-02 Hall David R Degradation assembly
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US7871133B2 (en) 2006-08-11 2011-01-18 Schlumberger Technology Corporation Locking fixture
US8414085B2 (en) * 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US7992945B2 (en) * 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US8007051B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Shank assembly
US7946657B2 (en) 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention for an insert
US8500210B2 (en) * 2006-08-11 2013-08-06 Schlumberger Technology Corporation Resilient pick shank
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US9145742B2 (en) 2006-08-11 2015-09-29 Schlumberger Technology Corporation Pointed working ends on a drill bit
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US8960337B2 (en) 2006-10-26 2015-02-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
US9051794B2 (en) 2007-04-12 2015-06-09 Schlumberger Technology Corporation High impact shearing element
US7926883B2 (en) 2007-05-15 2011-04-19 Schlumberger Technology Corporation Spring loaded pick
CA2639118A1 (en) * 2007-09-04 2009-03-04 Kenneth Monyak Hybrid retainer sleeve for tool inserted into block
RU2495242C2 (ru) * 2007-12-05 2013-10-10 Сандвик Интеллекчуал Проперти Аб Инструмент для отбойки и выемки грунта со вставкой из цементированного карбида вольфрама и кольцом, машина для выемки материала, включающая в себя такой инструмент, и способ изготовления такого инструмента
US8646848B2 (en) * 2007-12-21 2014-02-11 David R. Hall Resilient connection between a pick shank and block
US8746702B1 (en) * 2008-02-25 2014-06-10 Ajax Tool Works, Inc. Impact hammer tool bit retainer incorporating shielding ring
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
WO2009142577A1 (en) 2008-05-20 2009-11-26 Sandvik Intellectual Property Ab Carbide block and sleeve wear surface
US8061783B2 (en) * 2008-08-14 2011-11-22 Kennametal Inc. Bit holder block with non-rotating wear sleeve
US7883154B2 (en) * 2008-08-28 2011-02-08 Kennametal Inc. Cutting tool with water injection to the cutting bit shank
US8540320B2 (en) * 2009-04-02 2013-09-24 The Sollami Company Slotted shank bit holder
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US8727357B2 (en) * 2009-11-25 2014-05-20 Kennametal Inc. Toolholder secondary retention system
US9242299B2 (en) 2010-01-07 2016-01-26 Gkn Sinter Metals, Llc Machining tool and method of manufacturing same
US10598013B2 (en) 2010-08-27 2020-03-24 The Sollami Company Bit holder with shortened nose portion
US10072501B2 (en) 2010-08-27 2018-09-11 The Sollami Company Bit holder
US10385689B1 (en) 2010-08-27 2019-08-20 The Sollami Company Bit holder
US9879531B2 (en) 2014-02-26 2018-01-30 The Sollami Company Bit holder shank and differential interference between the shank distal portion and the bit holder block bore
US11261731B1 (en) 2014-04-23 2022-03-01 The Sollami Company Bit holder and unitary bit/holder for use in shortened depth base blocks
US10337324B2 (en) 2015-01-07 2019-07-02 The Sollami Company Various bit holders and unitary bit/holders for use with shortened depth bit holder blocks
US8740314B2 (en) * 2011-01-11 2014-06-03 Joy Mm Delaware, Inc. Bit holding system with an opening for removal of broken bits
US9757730B2 (en) 2011-07-06 2017-09-12 Joy Mm Delaware, Inc. Pick retainer
DE102011054384A1 (de) * 2011-10-11 2013-04-11 Betek Gmbh & Co. Kg Meißelhalter
RU2476672C1 (ru) * 2011-11-10 2013-02-27 Николай Митрофанович Панин Резец для горных машин
RU2458224C1 (ru) * 2011-11-10 2012-08-10 Николай Митрофанович Панин Резец для горных машин
US20130169022A1 (en) 2011-12-28 2013-07-04 Sandvik Intellectual Property Ab Radial and conical tools with compression band retainer
SE538940C2 (sv) * 2012-05-30 2017-02-28 Combi Wear Parts Ab Verktyg och verktygshållare för mudderverk
US9909416B1 (en) 2013-09-18 2018-03-06 The Sollami Company Diamond tipped unitary holder/bit
US10180065B1 (en) 2015-10-05 2019-01-15 The Sollami Company Material removing tool for road milling mining and trenching operations
US10107097B1 (en) 2012-10-19 2018-10-23 The Sollami Company Combination polycrystalline diamond bit and bit holder
US9988903B2 (en) 2012-10-19 2018-06-05 The Sollami Company Combination polycrystalline diamond bit and bit holder
US10323515B1 (en) 2012-10-19 2019-06-18 The Sollami Company Tool with steel sleeve member
US10105870B1 (en) 2012-10-19 2018-10-23 The Sollami Company Combination polycrystalline diamond bit and bit holder
US10260342B1 (en) 2012-10-19 2019-04-16 The Sollami Company Combination polycrystalline diamond bit and bit holder
AU2014201358B2 (en) 2013-03-12 2017-12-14 Joy Global Underground Mining Llc Tapered pick holder
US10415386B1 (en) 2013-09-18 2019-09-17 The Sollami Company Insertion-removal tool for holder/bit
US10633971B2 (en) 2016-03-07 2020-04-28 The Sollami Company Bit holder with enlarged tire portion and narrowed bit holder block
US10876402B2 (en) 2014-04-02 2020-12-29 The Sollami Company Bit tip insert
US10794181B2 (en) 2014-04-02 2020-10-06 The Sollami Company Bit/holder with enlarged ballistic tip insert
US10577931B2 (en) 2016-03-05 2020-03-03 The Sollami Company Bit holder (pick) with shortened shank and angular differential between the shank and base block bore
US10968739B1 (en) 2013-09-18 2021-04-06 The Sollami Company Diamond tipped unitary holder/bit
US10767478B2 (en) 2013-09-18 2020-09-08 The Sollami Company Diamond tipped unitary holder/bit
US9976418B2 (en) 2014-04-02 2018-05-22 The Sollami Company Bit/holder with enlarged ballistic tip insert
US10947844B1 (en) 2013-09-18 2021-03-16 The Sollami Company Diamond Tipped Unitary Holder/Bit
US10995613B1 (en) 2013-09-18 2021-05-04 The Sollami Company Diamond tipped unitary holder/bit
US11168563B1 (en) 2013-10-16 2021-11-09 The Sollami Company Bit holder with differential interference
US9212553B2 (en) 2013-11-08 2015-12-15 The Sollami Company Dirt and rock cutting bit tool
US11339656B1 (en) 2014-02-26 2022-05-24 The Sollami Company Rear of base block
CN103850652B (zh) * 2014-03-27 2015-11-18 湖南易通矿山工程机械有限公司 一种凿岩钻头合金齿镶嵌工艺
US11339654B2 (en) 2014-04-02 2022-05-24 The Sollami Company Insert with heat transfer bore
US11891895B1 (en) 2014-04-23 2024-02-06 The Sollami Company Bit holder with annular rings
CN107109931B (zh) * 2014-09-15 2019-09-13 久益环球地下采矿有限责任公司 用于钻头组件的维修工具
US9422812B2 (en) 2014-10-14 2016-08-23 Kennametal Inc. Cutting tool mounting assembly with elastomeric coated bushing
WO2016141895A1 (zh) * 2015-03-12 2016-09-15 刘素华 采掘机梁冲齿架插孔设主与侧往复齿方法及采掘机梁冲齿架插孔设主与侧往复齿装置
US10502056B2 (en) 2015-09-30 2019-12-10 The Sollami Company Reverse taper shanks and complementary base block bores for bit assemblies
US10612376B1 (en) 2016-03-15 2020-04-07 The Sollami Company Bore wear compensating retainer and washer
US10107098B2 (en) 2016-03-15 2018-10-23 The Sollami Company Bore wear compensating bit holder and bit holder block
CN105666093B (zh) * 2016-03-23 2017-09-12 宁波拓普工业自动化有限公司 一种轴与深孔过盈配合的装配方法
US10612375B2 (en) 2016-04-01 2020-04-07 The Sollami Company Bit retainer
US10876401B1 (en) 2016-07-26 2020-12-29 The Sollami Company Rotational style tool bit assembly
US11187080B2 (en) 2018-04-24 2021-11-30 The Sollami Company Conical bit with diamond insert
US10968738B1 (en) 2017-03-24 2021-04-06 The Sollami Company Remanufactured conical bit
US11279012B1 (en) 2017-09-15 2022-03-22 The Sollami Company Retainer insertion and extraction tool
US11103939B2 (en) 2018-07-18 2021-08-31 The Sollami Company Rotatable bit cartridge
CN110410074B (zh) * 2019-08-19 2024-05-03 天地科技股份有限公司上海分公司 抱紧装置和掘进机伸缩机构
US20240093641A1 (en) * 2022-09-16 2024-03-21 Pratt & Whitney Canada Corp. Propeller shaft assembly for aircraft engine

Family Cites Families (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143177A (en) * 1961-01-23 1964-08-04 Louis C Galorneau Tool holder
US3397012A (en) * 1966-12-19 1968-08-13 Cincinnati Mine Machinery Co Cutter bits and means for mounting them
US3499685A (en) * 1968-08-08 1970-03-10 Kennametal Inc Pick-type mining bit with support block having rotatable seat
GB1218308A (en) 1969-08-11 1971-01-06 Kennametal Inc Mining tool
US3749190A (en) * 1971-05-06 1973-07-31 Ingersoll Rand Co Retaining carbide in rock drill bits
US3941495A (en) * 1975-03-14 1976-03-02 Lane Duncan Ball and socket joint and method of making the same
US4685381A (en) * 1978-05-31 1987-08-11 Karl Eickmann Pivot portion of a piston shoe in fluid machines
AT354385B (de) * 1978-06-15 1980-01-10 Voest Ag Meisselanordnung fuer ein schraemwerkzeug
US4201421A (en) * 1978-09-20 1980-05-06 Besten Leroy E Den Mining machine bit and mounting thereof
DE2854307A1 (de) * 1978-12-15 1980-07-03 Kennametal Inc Halter zur anbringung von meisseln, insbesondere von rundschaftmeisseln an bergbaulichen gewinnungs- und streckenvortriebsmaschinen
US4337980A (en) * 1979-05-21 1982-07-06 The Cincinnati Mine Machinery Company Wedge arrangements and related means for mounting means, base members, and bits, and combinations thereof, for mining, road working, or earth moving machinery
US4247147A (en) 1979-11-21 1981-01-27 Sandvik Aktiebolag Retainer clip for cutter bits
US4299424A (en) * 1979-12-03 1981-11-10 National Mine Service Company Cutting tool assembly
GB2071184B (en) 1980-03-05 1985-01-23 Hollingworth K J Coal cutter pick boxes
AT369859B (de) * 1981-03-12 1983-02-10 Voest Alpine Ag Einrichtung zum kuehlen der meissel einer schraemmaschine
AT375149B (de) * 1982-07-06 1984-07-10 Voest Alpine Ag Mit einer spruehvorrichtung ausgestatteter meisselhalter
DE3242137C2 (de) * 1982-11-13 1985-06-05 Ruhrkohle Ag, 4300 Essen Gedämpft geführter Rundschaftmeißel
DE3307910A1 (de) 1983-03-05 1984-09-27 Fried. Krupp Gmbh, 4300 Essen Werkzeuganordnung mit einem rundschaftmeissel
US4470210A (en) * 1983-05-25 1984-09-11 Esco Corporation Mounting for excavating implement and method
GB8333339D0 (en) 1983-12-14 1984-01-18 Hall & Pickles Ltd Mineral cutter pick and box
US4575156A (en) * 1984-03-13 1986-03-11 Fansteel Inc. Mining block and bit
US4684176A (en) * 1984-05-16 1987-08-04 Den Besten Leroy E Cutter bit device
US4632463A (en) * 1984-08-03 1986-12-30 The Cincinnati Mine Machinery Company Combined base member and bit holder with protected retainer
JPS6295395A (ja) * 1985-10-21 1987-05-01 Buaioretsuto:Kk 潤滑油用添加剤
US4836614A (en) * 1985-11-21 1989-06-06 Gte Products Corporation Retainer scheme for machine bit
DE3630443A1 (de) 1986-09-06 1988-03-10 Worley & Partner Gmbh Vorrichtung zur schneidenden gewinnung/abtragung von materialien
US4850649A (en) * 1986-10-07 1989-07-25 Kennametal Inc. Rotatable cutting bit
US4728153A (en) * 1986-12-22 1988-03-01 Gte Products Corporation Cylindrical retainer for a cutting bit
SE461165B (sv) * 1987-06-12 1990-01-15 Hans Olav Norman Verktyg foer brytning, avverkning eller bearbetning av fasta material
US5067775A (en) * 1988-04-21 1991-11-26 Kennametal Inc. Retainer for rotatable bits
US4875532A (en) * 1988-09-19 1989-10-24 Dresser Industries, Inc. Roller drill bit having radial-thrust pilot bushing incorporating anti-galling material
DE3911893A1 (de) 1989-04-12 1990-10-18 Paurat Gmbh Vorrichtung fuer die schneidmeisselhalterung am schneidkopf einer vortriebsmaschine
US5088797A (en) * 1990-09-07 1992-02-18 Joy Technologies Inc. Method and apparatus for holding a cutting bit
US5106166A (en) 1990-09-07 1992-04-21 Joy Technologies Inc. Cutting bit holding apparatus
GB2273513B (en) 1992-12-04 1996-04-24 Hydra Tools Int Plc Mineral cutter tooling system
GB9400114D0 (en) * 1994-01-05 1994-03-02 Minnovation Ltd Mineral pick box
US5685381A (en) 1995-07-21 1997-11-11 Kennametal South Africa (Proprietary) Limited Drill rod and drill bit with rocking connection
US5607206A (en) 1995-08-02 1997-03-04 Kennametal Inc. Cutting tool holder retention system
AT406503B (de) * 1995-12-21 2000-06-26 Voest Alpine Bergtechnik Meisselanordnung für einen rundschaftmeissel
US5725283A (en) * 1996-04-16 1998-03-10 Joy Mm Delaware, Inc. Apparatus for holding a cutting bit
US6176552B1 (en) 1998-10-05 2001-01-23 Kennametal Inc. Cutting bit support member with undercut flange for removal
US6113195A (en) * 1998-10-08 2000-09-05 Sandvik Ab Rotatable cutting bit and bit washer therefor
UA73489C2 (en) 1998-12-08 2005-08-15 Genisis Mining Technologies Pr Cutting arrangement and sleeve for it
PL187208B1 (pl) 1999-01-25 2004-06-30 Boart Longyear Gmbh & Co Kg Zespół noża obrotowego zwłaszcza do maszyn górniczych
USD422127S (en) * 1999-03-02 2000-03-28 Ipl Inc. Barrel
US6371567B1 (en) 1999-03-22 2002-04-16 The Sollami Company Bit holders and bit blocks for road milling, mining and trenching equipment
USD448909S1 (en) * 2000-06-06 2001-10-02 Irene Friesen Barrel
US6786557B2 (en) * 2000-12-20 2004-09-07 Kennametal Inc. Protective wear sleeve having tapered lock and retainer
US6854810B2 (en) * 2000-12-20 2005-02-15 Kennametal Inc. T-shaped cutter tool assembly with wear sleeve

Also Published As

Publication number Publication date
AU2006200642B9 (en) 2011-07-14
CN1828015B (zh) 2011-02-09
GB2423319B (en) 2010-05-05
US20070013224A1 (en) 2007-01-18
AU2006200642A1 (en) 2006-09-07
US7270379B2 (en) 2007-09-18
EP1703077B1 (de) 2008-09-17
NO20060765L (no) 2006-08-21
EP1703077A3 (de) 2006-11-29
EP1956187B1 (de) 2012-04-11
GB2423319A (en) 2006-08-23
CN1828015A (zh) 2006-09-06
US7234782B2 (en) 2007-06-26
CA2535598A1 (en) 2006-08-18
AU2006200642B2 (en) 2011-02-17
EP1956187A3 (de) 2010-02-17
EP1956187A2 (de) 2008-08-13
GB0602972D0 (en) 2006-03-29
DE602006002761D1 (de) 2008-10-30
CA2535598C (en) 2012-04-24
ATE553283T1 (de) 2012-04-15
MXPA06001935A (es) 2007-04-17
EP1703077A2 (de) 2006-09-20
US20060186724A1 (en) 2006-08-24

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Legal Events

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties
REN Ceased due to non-payment of the annual fee