FR726390A - Improvements to shearers - Google Patents

Improvements to shearers

Info

Publication number
FR726390A
FR726390A FR726390DA FR726390A FR 726390 A FR726390 A FR 726390A FR 726390D A FR726390D A FR 726390DA FR 726390 A FR726390 A FR 726390A
Authority
FR
France
Prior art keywords
shearers
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)
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.)
Sullivan Machinery Co
Original Assignee
Sullivan Machinery Co
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 Sullivan Machinery Co filed Critical Sullivan Machinery Co
Application granted granted Critical
Publication of FR726390A publication Critical patent/FR726390A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
    • E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
    • E21C29/06—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains anchored at one or both ends to the mine working face
    • E21C29/10—Cable or chain co-operating with a winch or the like on the machine
FR726390D 1929-12-07 1930-11-22 Improvements to shearers Expired FR726390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US726390XA 1929-12-07 1929-12-07

Publications (1)

Publication Number Publication Date
FR726390A true FR726390A (en) 1932-05-27

Family

ID=22108880

Family Applications (1)

Application Number Title Priority Date Filing Date
FR726390D Expired FR726390A (en) 1929-12-07 1930-11-22 Improvements to shearers

Country Status (1)

Country Link
FR (1) FR726390A (en)

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