ZA705768B - A pendulum control device,in particular for hydraulic pit prop units - Google Patents

A pendulum control device,in particular for hydraulic pit prop units

Info

Publication number
ZA705768B
ZA705768B ZA705768A ZA705768A ZA705768B ZA 705768 B ZA705768 B ZA 705768B ZA 705768 A ZA705768 A ZA 705768A ZA 705768 A ZA705768 A ZA 705768A ZA 705768 B ZA705768 B ZA 705768B
Authority
ZA
South Africa
Prior art keywords
control device
pendulum control
pit prop
hydraulic pit
prop units
Prior art date
Application number
ZA705768A
Inventor
M Kuhn
Original Assignee
Kloeckner Werke Ag
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 Kloeckner Werke Ag filed Critical Kloeckner Werke Ag
Publication of ZA705768B publication Critical patent/ZA705768B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/60—Automatic controllers hydraulic only

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
ZA705768A 1969-09-02 1970-08-21 A pendulum control device,in particular for hydraulic pit prop units ZA705768B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691944394 DE1944394A1 (en) 1969-09-02 1969-09-02 Pendulum control, especially for hydraulic longwall construction

Publications (1)

Publication Number Publication Date
ZA705768B true ZA705768B (en) 1971-04-28

Family

ID=5744338

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA705768A ZA705768B (en) 1969-09-02 1970-08-21 A pendulum control device,in particular for hydraulic pit prop units

Country Status (5)

Country Link
BE (1) BE755500A (en)
DE (1) DE1944394A1 (en)
FR (1) FR2060731A5 (en)
GB (1) GB1298894A (en)
ZA (1) ZA705768B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938766A1 (en) * 1989-11-23 1991-05-29 Rexroth Mannesmann Gmbh Simple level controller with hydraulic control valve - has controller mechanically coupled to pendulum actuator with damped pendulum arm, no expensive control electronics

Also Published As

Publication number Publication date
BE755500A (en) 1971-02-01
DE1944394A1 (en) 1971-03-11
FR2060731A5 (en) 1971-06-18
GB1298894A (en) 1972-12-06

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