DE60021451D1 - Keramikkugel für Kugellager - Google Patents

Keramikkugel für Kugellager

Info

Publication number
DE60021451D1
DE60021451D1 DE60021451T DE60021451T DE60021451D1 DE 60021451 D1 DE60021451 D1 DE 60021451D1 DE 60021451 T DE60021451 T DE 60021451T DE 60021451 T DE60021451 T DE 60021451T DE 60021451 D1 DE60021451 D1 DE 60021451D1
Authority
DE
Germany
Prior art keywords
ball
ceramic
bearings
ball bearings
ceramic ball
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.)
Revoked
Application number
DE60021451T
Other languages
English (en)
Other versions
DE60021451T2 (de
Inventor
Tomonori Niwa
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13043199&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE60021451(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Application granted granted Critical
Publication of DE60021451D1 publication Critical patent/DE60021451D1/de
Publication of DE60021451T2 publication Critical patent/DE60021451T2/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/32—Balls
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/593—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
    • C04B35/5935—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering obtained by gas pressure sintering
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/963—Surface properties, e.g. surface roughness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Rolling Contact Bearings (AREA)
DE60021451T 1999-03-04 2000-03-03 Keramikkugel für Kugellager Revoked DE60021451T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5699999 1999-03-04
JP5699999 1999-03-04

Publications (2)

Publication Number Publication Date
DE60021451D1 true DE60021451D1 (de) 2005-09-01
DE60021451T2 DE60021451T2 (de) 2006-06-08

Family

ID=13043199

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60021451T Revoked DE60021451T2 (de) 1999-03-04 2000-03-03 Keramikkugel für Kugellager

Country Status (4)

Country Link
US (1) US6315454B1 (de)
EP (1) EP1033505B1 (de)
DE (1) DE60021451T2 (de)
TW (1) TW515873B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002235744A (ja) * 2001-02-13 2002-08-23 Ngk Spark Plug Co Ltd セラミック動圧軸受、軸受付きモータ、ハードディスク装置及びポリゴンスキャナ
US20040170347A1 (en) * 2001-09-28 2004-09-02 Norifumi Ikeda Rolling unit
US7044644B2 (en) * 2003-05-27 2006-05-16 Ge Medical Systems Global Technology Company, Llc Electrically conducting ceramic bearings
US20050254739A1 (en) * 2003-05-27 2005-11-17 George Parampil Electrically conducting ceramic bearing rolling elements
KR100571156B1 (ko) * 2004-10-11 2006-04-17 엘에스전선 주식회사 하이브리드형 베어링
WO2016007224A2 (en) * 2014-05-16 2016-01-14 Powdermet, Inc. Heterogeneous composite bodies with isolated cermet regions formed by high temperature, rapid consolidation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62298976A (ja) * 1986-06-19 1987-12-26 Nec Corp 磁気ヘツド位置決め制御装置
GB2219359B (en) 1988-05-30 1992-11-04 Ntn Toyo Bearing Co Ltd Roller elements for machine parts such as roller bearings.
DE4201615C2 (de) 1992-01-22 2001-03-08 Inocermic Ges Fuer Innovative Verfahren zur Herstellung von keramischen Kugeln
US6215606B1 (en) * 1993-03-08 2001-04-10 International Business Machines Corporation Method and system for determining the widest recording head of a recording device
US5485331A (en) * 1993-09-30 1996-01-16 Seagate Technology, Inc. High resistivity bearing balls for spindle motor isolation
JP3459484B2 (ja) * 1993-12-24 2003-10-20 Ｎｔｎ株式会社 玉軸受用玉
US5524985A (en) * 1995-03-21 1996-06-11 Seagate Technology, Inc. Fluid thermal compensation and containment for hydrodynamic bearings

Also Published As

Publication number Publication date
EP1033505B1 (de) 2005-07-27
EP1033505A1 (de) 2000-09-06
DE60021451T2 (de) 2006-06-08
TW515873B (en) 2003-01-01
US6315454B1 (en) 2001-11-13

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation