ZA783545B - Directional valve means for positioning machine units - Google Patents

Directional valve means for positioning machine units

Info

Publication number
ZA783545B
ZA783545B ZA00783545A ZA783545A ZA783545B ZA 783545 B ZA783545 B ZA 783545B ZA 00783545 A ZA00783545 A ZA 00783545A ZA 783545 A ZA783545 A ZA 783545A ZA 783545 B ZA783545 B ZA 783545B
Authority
ZA
South Africa
Prior art keywords
valve means
directional valve
positioning machine
machine units
units
Prior art date
Application number
ZA00783545A
Inventor
A Molin
Original Assignee
Atlas Copco Ab
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 Atlas Copco Ab filed Critical Atlas Copco Ab
Publication of ZA783545B publication Critical patent/ZA783545B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E21B7/025—Rock drills, i.e. jumbo drills
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • E21B7/022—Control of the drilling operation; Hydraulic or pneumatic means for activation or operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/10—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which the controlling element and the servomotor each controls a separate member, these members influencing different fluid passages or the same passage

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
ZA00783545A 1977-06-21 1978-06-21 Directional valve means for positioning machine units ZA783545B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7707137A SE406208B (en) 1977-06-21 1977-06-21 DIRECTION VALVE DEVICE FOR DIRECTION OF MACHINE UNITS

Publications (1)

Publication Number Publication Date
ZA783545B true ZA783545B (en) 1979-06-27

Family

ID=20331642

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00783545A ZA783545B (en) 1977-06-21 1978-06-21 Directional valve means for positioning machine units

Country Status (3)

Country Link
ES (1) ES470939A1 (en)
SE (1) SE406208B (en)
ZA (1) ZA783545B (en)

Also Published As

Publication number Publication date
ES470939A1 (en) 1979-02-01
SE406208B (en) 1979-01-29
SE7707137L (en) 1978-12-22

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