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AT195874B - Hydraulic pit ram - Google Patents

Hydraulic pit ram

Info

Publication number
AT195874B
AT195874B AT195874DA AT195874B AT 195874 B AT195874 B AT 195874B AT 195874D A AT195874D A AT 195874DA AT 195874 B AT195874 B AT 195874B
Authority
AT
Austria
Prior art keywords
hydraulic pit
ram
pit ram
hydraulic
pit
Prior art date
Application number
Other languages
German (de)
Original Assignee
Saarlaend Grubenausbau
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 Saarlaend Grubenausbau filed Critical Saarlaend Grubenausbau
Application granted granted Critical
Publication of AT195874B publication Critical patent/AT195874B/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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Details Of Reciprocating Pumps (AREA)
AT195874D 1956-05-28 1956-05-28 Hydraulic pit ram AT195874B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT195874T 1956-05-28

Publications (1)

Publication Number Publication Date
AT195874B true AT195874B (en) 1958-02-25

Family

ID=29554731

Family Applications (1)

Application Number Title Priority Date Filing Date
AT195874D AT195874B (en) 1956-05-28 1956-05-28 Hydraulic pit ram

Country Status (4)

Country Link
AT (1) AT195874B (en)
BE (1) BE557875A (en)
DE (1) DE1408060A1 (en)
FR (1) FR1175838A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132878B (en) * 1960-05-21 1962-07-12 Hermann Schwarz Kommanditgesel Hydraulic support element for pit construction
DE1137406B (en) * 1960-06-30 1962-10-04 Kronprinz Ag Hydraulic pit ram
DE1231648B (en) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulic expansion element, especially for underground mining operations

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132878B (en) * 1960-05-21 1962-07-12 Hermann Schwarz Kommanditgesel Hydraulic support element for pit construction
DE1137406B (en) * 1960-06-30 1962-10-04 Kronprinz Ag Hydraulic pit ram
DE1231648B (en) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulic expansion element, especially for underground mining operations

Also Published As

Publication number Publication date
BE557875A (en)
DE1408060A1 (en) 1968-10-17
FR1175838A (en) 1959-04-02

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