FR2160881B1 - - Google Patents

Info

Publication number
FR2160881B1
FR2160881B1 FR7241112A FR7241112A FR2160881B1 FR 2160881 B1 FR2160881 B1 FR 2160881B1 FR 7241112 A FR7241112 A FR 7241112A FR 7241112 A FR7241112 A FR 7241112A FR 2160881 B1 FR2160881 B1 FR 2160881B1
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.)
Expired
Application number
FR7241112A
Other languages
French (fr)
Other versions
FR2160881A1 (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.)
Wallram Hartmetall GmbH
Original Assignee
Wallram Hartmetall GmbH
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 Wallram Hartmetall GmbH filed Critical Wallram Hartmetall GmbH
Publication of FR2160881A1 publication Critical patent/FR2160881A1/fr
Application granted granted Critical
Publication of FR2160881B1 publication Critical patent/FR2160881B1/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
FR7241112A 1971-11-26 1972-11-20 Expired FR2160881B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712158628 DE2158628B1 (en) 1971-11-26 1971-11-26 DRILL EDGE

Publications (2)

Publication Number Publication Date
FR2160881A1 FR2160881A1 (en) 1973-07-06
FR2160881B1 true FR2160881B1 (en) 1975-06-13

Family

ID=5826189

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7241112A Expired FR2160881B1 (en) 1971-11-26 1972-11-20

Country Status (4)

Country Link
DE (1) DE2158628B1 (en)
FR (1) FR2160881B1 (en)
GB (1) GB1352960A (en)
IT (1) IT971088B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734763A1 (en) * 1997-08-12 1999-02-18 Bosch Gmbh Robert Tool holder for a hand machine tool and tool shank that can be used therein

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1197183A (en) * 1958-05-29 1959-11-27 J K Smit & Fils Ets Improvements to diamond drill heads
GB1181428A (en) * 1967-11-28 1970-02-18 Padley & Venables Ltd Improvements in or relating to Percussive Drill Bits
CH492867A (en) * 1968-11-12 1970-06-30 Karnebogen Richard Carbide-tipped hammer drill bit

Also Published As

Publication number Publication date
DE2158628A1 (en) 1973-05-03
DE2158628B1 (en) 1973-05-03
GB1352960A (en) 1974-05-15
FR2160881A1 (en) 1973-07-06
IT971088B (en) 1974-04-30

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Legal Events

Date Code Title Description
ST Notification of lapse