DE253799C - - Google Patents

Info

Publication number
DE253799C
DE253799C DENDAT253799D DE253799DA DE253799C DE 253799 C DE253799 C DE 253799C DE NDAT253799 D DENDAT253799 D DE NDAT253799D DE 253799D A DE253799D A DE 253799DA DE 253799 C DE253799 C DE 253799C
Authority
DE
Germany
Prior art keywords
coal
usw
spirals
backwards
lying
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.)
Active
Application number
DENDAT253799D
Other languages
German (de)
Publication of DE253799C publication Critical patent/DE253799C/de
Active 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
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts

Description

KKBLIN. UEDIIUCKT IN DER RElCHSDRUCKEREt.KKBLIN. PRINTED IN THE REAL PRINT.

Claims (1)

Patent-Anspruch:Patent claim: Kohlenwolf mit absatzweise angeordneten Werkzeugen, gekennzeichnet durch zwei in der Mantelfläche eines Kegels liegende Spiralen (f1, f2), von denen die eine (f1) die Sägezähne (b1, b2, bs UsW7) trägt, während die andere (f2) die fallende Kohle nach rückwärts fördert.Coal grinder with intermittently arranged tools, characterized by two spirals (f 1 , f 2 ) lying in the outer surface of a cone, one of which (f 1 ) carries the saw teeth (b 1 , b 2 , b s UsW 7 ), while the other (f 2 ) promotes falling coal backwards. Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.
DENDAT253799D Active DE253799C (en)

Publications (1)

Publication Number Publication Date
DE253799C true DE253799C (en)

Family

ID=512044

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT253799D Active DE253799C (en)

Country Status (1)

Country Link
DE (1) DE253799C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288532A (en) * 1964-03-10 1966-11-29 Union Oil Co Continuous mining machine and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288532A (en) * 1964-03-10 1966-11-29 Union Oil Co Continuous mining machine and method

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