FR365549A - Perfectionnements apportés aux haveuses - Google Patents

Perfectionnements apportés aux haveuses

Info

Publication number
FR365549A
FR365549A FR365549DA FR365549A FR 365549 A FR365549 A FR 365549A FR 365549D A FR365549D A FR 365549DA FR 365549 A FR365549 A FR 365549A
Authority
FR
France
Prior art keywords
shearers
improvements made
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
English (en)
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.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand 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 Ingersoll Rand Co filed Critical Ingersoll Rand Co
Application granted granted Critical
Publication of FR365549A publication Critical patent/FR365549A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/28—Mineral freed by means not involving slitting by percussive drills with breaking-down means, e.g. wedge-shaped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
FR365549D 1906-04-24 1906-04-24 Perfectionnements apportés aux haveuses Expired FR365549A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR365549T 1906-04-24

Publications (1)

Publication Number Publication Date
FR365549A true FR365549A (fr) 1906-09-10

Family

ID=1412823

Family Applications (1)

Application Number Title Priority Date Filing Date
FR365549D Expired FR365549A (fr) 1906-04-24 1906-04-24 Perfectionnements apportés aux haveuses

Country Status (1)

Country Link
FR (1) FR365549A (fr)

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