FR854710A - Perforatrice pour roche - Google Patents

Perforatrice pour roche

Info

Publication number
FR854710A
FR854710A FR854710DA FR854710A FR 854710 A FR854710 A FR 854710A FR 854710D A FR854710D A FR 854710DA FR 854710 A FR854710 A FR 854710A
Authority
FR
France
Prior art keywords
hole punch
rock hole
rock
punch
hole
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 FR854710A publication Critical patent/FR854710A/fr
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
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR854710D 1939-05-13 1939-05-13 Perforatrice pour roche Expired FR854710A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR854710T 1939-05-13

Publications (1)

Publication Number Publication Date
FR854710A true FR854710A (fr) 1940-04-23

Family

ID=9327895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR854710D Expired FR854710A (fr) 1939-05-13 1939-05-13 Perforatrice pour roche

Country Status (1)

Country Link
FR (1) FR854710A (fr)

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