AT330440B - HOLLOW BIT - Google Patents

HOLLOW BIT

Info

Publication number
AT330440B
AT330440B AT91674A AT91674A AT330440B AT 330440 B AT330440 B AT 330440B AT 91674 A AT91674 A AT 91674A AT 91674 A AT91674 A AT 91674A AT 330440 B AT330440 B AT 330440B
Authority
AT
Austria
Prior art keywords
hollow bit
bit
hollow
Prior art date
Application number
AT91674A
Other languages
German (de)
Other versions
ATA91674A (en
Original Assignee
Hawera Probst Kg Hartmetall
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 Kg Hartmetall filed Critical Hawera Probst Kg Hartmetall
Publication of ATA91674A publication Critical patent/ATA91674A/en
Application granted granted Critical
Publication of AT330440B publication Critical patent/AT330440B/en

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)
AT91674A 1973-02-09 1974-02-06 HOLLOW BIT AT330440B (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
ATA91674A ATA91674A (en) 1975-09-15
AT330440B true AT330440B (en) 1976-06-25

Family

ID=25764666

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91674A AT330440B (en) 1973-02-09 1974-02-06 HOLLOW BIT

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
ATA91674A (en) 1975-09-15
FR2217136A1 (en) 1974-09-06
CH585339A5 (en) 1977-02-28
JPS49112801A (en) 1974-10-28

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee
REN Ceased due to non-payment of the annual fee