FR588897A - Rock Drill Improvements - Google Patents

Rock Drill Improvements

Info

Publication number
FR588897A
FR588897A FR588897DA FR588897A FR 588897 A FR588897 A FR 588897A FR 588897D A FR588897D A FR 588897DA FR 588897 A FR588897 A FR 588897A
Authority
FR
France
Prior art keywords
rock drill
drill
rock
drill improvements
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.)
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 FR588897A publication Critical patent/FR588897A/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
    • B25D9/24—Valve arrangements therefor involving a rocking-plate type valve

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR588897D 1924-09-13 1924-11-15 Rock Drill Improvements Expired FR588897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US588897XA 1924-09-13 1924-09-13

Publications (1)

Publication Number Publication Date
FR588897A true FR588897A (en) 1925-05-16

Family

ID=22019536

Family Applications (1)

Application Number Title Priority Date Filing Date
FR588897D Expired FR588897A (en) 1924-09-13 1924-11-15 Rock Drill Improvements

Country Status (1)

Country Link
FR (1) FR588897A (en)

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