FR949150A - Combination router - Google Patents

Combination router

Info

Publication number
FR949150A
FR949150A FR949150DA FR949150A FR 949150 A FR949150 A FR 949150A FR 949150D A FR949150D A FR 949150DA FR 949150 A FR949150 A FR 949150A
Authority
FR
France
Prior art keywords
combination router
router
combination
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.)
Expired
Application number
Other languages
French (fr)
Inventor
Paul Marcerou
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 filed Critical
Application granted granted Critical
Publication of FR949150A publication Critical patent/FR949150A/en
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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/081—Screw-and-nut feed mechanisms
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/001—Drilling a non circular hole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/52—Machines incorporating two or more of the slitting means according to groups E21C25/02, E21C25/06, E21C25/16, E21C25/20 and E21C25/22
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes
FR949150D 1947-07-01 1947-07-01 Combination router Expired FR949150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR851486X 1947-07-01

Publications (1)

Publication Number Publication Date
FR949150A true FR949150A (en) 1949-08-22

Family

ID=9323611

Family Applications (2)

Application Number Title Priority Date Filing Date
FR949150D Expired FR949150A (en) 1947-07-01 1947-07-01 Combination router
FR56970D Expired FR56970E (en) 1947-07-01 1947-12-30 Combination router

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR56970D Expired FR56970E (en) 1947-07-01 1947-12-30 Combination router

Country Status (4)

Country Link
BE (1) BE422748A (en)
DE (1) DE851486C (en)
FR (2) FR949150A (en)
LU (1) LU29081A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102691500A (en) * 2011-03-19 2012-09-26 刘素华 Sawing-impacting coal cutter
CN110242293A (en) * 2019-06-21 2019-09-17 辽宁工程技术大学 A kind of rotary digging formula Coal cutter

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075070B (en) * 1960-02-11 Gebr. Eickhoff Maschinenfabrik u. Eisengießerei m.b.H., Bochum Extraction machine with several gear-driven, axially parallel cutting rollers
GB1552636A (en) * 1975-05-29 1979-09-19 Wibom G H O Drilling machine
US5570934A (en) * 1995-03-16 1996-11-05 Hydro-Quebec Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts
DE102011087096B4 (en) * 2011-11-25 2014-12-11 Pierre-Yves Mutel Tool and method for creating boreholes with a non-rotationally symmetrical cross section

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102691500A (en) * 2011-03-19 2012-09-26 刘素华 Sawing-impacting coal cutter
CN110242293A (en) * 2019-06-21 2019-09-17 辽宁工程技术大学 A kind of rotary digging formula Coal cutter

Also Published As

Publication number Publication date
BE422748A (en)
DE851486C (en) 1952-10-06
LU29081A1 (en)
FR56970E (en) 1952-10-10

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