FR435398A - Rock drilling machine improvements - Google Patents

Rock drilling machine improvements

Info

Publication number
FR435398A
FR435398A FR435398DA FR435398A FR 435398 A FR435398 A FR 435398A FR 435398D A FR435398D A FR 435398DA FR 435398 A FR435398 A FR 435398A
Authority
FR
France
Prior art keywords
drilling machine
rock drilling
machine improvements
rock
machine
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
George Henry Rayner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR435398A publication Critical patent/FR435398A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B25D9/16—Valve arrangements therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR435398D 1910-10-18 1911-10-18 Rock drilling machine improvements Expired FR435398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB435398X 1910-10-18

Publications (1)

Publication Number Publication Date
FR435398A true FR435398A (en) 1912-02-28

Family

ID=1477198

Family Applications (1)

Application Number Title Priority Date Filing Date
FR435398D Expired FR435398A (en) 1910-10-18 1911-10-18 Rock drilling machine improvements

Country Status (1)

Country Link
FR (1) FR435398A (en)

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