FR2217136A1 - - Google Patents

Info

Publication number
FR2217136A1
FR2217136A1 FR7403680A FR7403680A FR2217136A1 FR 2217136 A1 FR2217136 A1 FR 2217136A1 FR 7403680 A FR7403680 A FR 7403680A FR 7403680 A FR7403680 A FR 7403680A FR 2217136 A1 FR2217136 A1 FR 2217136A1
Authority
FR
France
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
FR7403680A
Other languages
French (fr)
Other versions
FR2217136B1 (en
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.)
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
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
Priority claimed from DE19732306361 external-priority patent/DE2306361A1/en
Priority claimed from DE19732360465 external-priority patent/DE2360465A1/en
Application filed by Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of FR2217136A1 publication Critical patent/FR2217136A1/fr
Application granted granted Critical
Publication of FR2217136B1 publication Critical patent/FR2217136B1/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
FR7403680A 1973-02-09 1974-02-04 Expired FR2217136B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732306361 DE2306361A1 (en) 1973-02-09 1973-02-09 HOLLOW BIT
DE19732360465 DE2360465A1 (en) 1973-12-05 1973-12-05 HOLLOW BIT

Publications (2)

Publication Number Publication Date
FR2217136A1 true FR2217136A1 (en) 1974-09-06
FR2217136B1 FR2217136B1 (en) 1978-11-10

Family

ID=25764666

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7403680A Expired FR2217136B1 (en) 1973-02-09 1974-02-04

Country Status (8)

Country Link
JP (1) JPS49112801A (en)
AT (1) AT330440B (en)
CH (1) CH585339A5 (en)
FR (1) FR2217136B1 (en)
GB (1) GB1465363A (en)
IT (1) IT1007281B (en)
NL (1) NL7401845A (en)
SE (1) SE406950B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477253B1 (en) * 1989-06-14 1993-08-11 Tyrolit Schleifmittelwerke Swarovski KG Hollow drill

Also Published As

Publication number Publication date
SE406950B (en) 1979-03-05
NL7401845A (en) 1974-08-13
FR2217136B1 (en) 1978-11-10
IT1007281B (en) 1976-10-30
GB1465363A (en) 1977-02-23
AT330440B (en) 1976-06-25
ATA91674A (en) 1975-09-15
CH585339A5 (en) 1977-02-28
JPS49112801A (en) 1974-10-28

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Legal Events

Date Code Title Description
ST Notification of lapse