BE441002A - - Google Patents

Info

Publication number: BE441002A
Authority: BE; Belgium

Application number

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.)

1940-03-27

Publication of BE441002A publication Critical patent/BE441002A/xx

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
- E21B6/00—Drives for drilling with combined rotary and percussive action
- E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Geology (AREA)
Mining & Mineral Resources (AREA)
Physics & Mathematics (AREA)
Environmental & Geological Engineering (AREA)
Fluid Mechanics (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)

BE441002D 1940-03-27 BE441002A (US06262066-20010717-C00424.png)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE220151X		1940-03-27

Publications (1)

Publication Number	Publication Date
BE441002A true BE441002A (US06262066-20010717-C00424.png)

Family

ID=5832914

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE441002D BE441002A (US06262066-20010717-C00424.png)	1940-03-27

Country Status (3)

Country	Link
BE (1)	BE441002A (US06262066-20010717-C00424.png)
CH (1)	CH220151A (US06262066-20010717-C00424.png)
FR (1)	FR871080A (US06262066-20010717-C00424.png)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE924202C (de) *	1952-10-26	1955-02-28	Friedrich Heinrich Flottmann F	Bohrhammer

0
- BE BE441002D patent/BE441002A/xx unknown
1941
- 1941-03-24 CH CH220151D patent/CH220151A/de unknown
- 1941-03-26 FR FR871080D patent/FR871080A/fr not_active Expired

Also Published As

Publication number	Publication date
FR871080A (fr)	1942-04-07
CH220151A (de)	1942-03-31

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