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FR76138E - Improvements to breather for mine props - Google Patents

Improvements to breather for mine props

Info

Publication number
FR76138E
FR76138E FR802516A FR802516A FR76138E FR 76138 E FR76138 E FR 76138E FR 802516 A FR802516 A FR 802516A FR 802516 A FR802516 A FR 802516A FR 76138 E FR76138 E FR 76138E
Authority
FR
France
Prior art keywords
breather
mine props
props
mine
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
FR802516A
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment Ltd
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
Priority claimed from GB220/58A external-priority patent/GB891624A/en
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to FR802516A priority Critical patent/FR76138E/en
Application granted granted Critical
Publication of FR76138E publication Critical patent/FR76138E/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • 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
    • 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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR802516A 1958-01-02 1959-08-10 Improvements to breather for mine props Expired FR76138E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR802516A FR76138E (en) 1958-01-02 1959-08-10 Improvements to breather for mine props

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB220/58A GB891624A (en) 1958-01-02 1958-01-02 Valves suitable for use as air breather valves in pit props
FR802516A FR76138E (en) 1958-01-02 1959-08-10 Improvements to breather for mine props

Publications (1)

Publication Number Publication Date
FR76138E true FR76138E (en) 1961-09-15

Family

ID=26184285

Family Applications (1)

Application Number Title Priority Date Filing Date
FR802516A Expired FR76138E (en) 1958-01-02 1959-08-10 Improvements to breather for mine props

Country Status (1)

Country Link
FR (1) FR76138E (en)

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