FR587002A - Coal and stone extractor - Google Patents

Coal and stone extractor

Info

Publication number
FR587002A
FR587002A FR587002DA FR587002A FR 587002 A FR587002 A FR 587002A FR 587002D A FR587002D A FR 587002DA FR 587002 A FR587002 A FR 587002A
Authority
FR
France
Prior art keywords
coal
stone extractor
extractor
stone
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
Adolf Linnemann
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 FR587002A publication Critical patent/FR587002A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/04—Other methods or devices for dislodging with or without loading by devices with parts pressed mechanically against the wall of a borehole or a slit
FR587002D 1924-10-02 1924-10-02 Coal and stone extractor Expired FR587002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR587002T 1924-10-02

Publications (1)

Publication Number Publication Date
FR587002A true FR587002A (en) 1925-04-09

Family

ID=8961104

Family Applications (1)

Application Number Title Priority Date Filing Date
FR587002D Expired FR587002A (en) 1924-10-02 1924-10-02 Coal and stone extractor

Country Status (1)

Country Link
FR (1) FR587002A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959273C (en) * 1953-08-24 1957-03-07 Joy Sullivan Ltd Extraction drilling machine head with cutting cylinder and conical core breaking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959273C (en) * 1953-08-24 1957-03-07 Joy Sullivan Ltd Extraction drilling machine head with cutting cylinder and conical core breaking device

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