GB1349487A - Pit prop - Google Patents

Pit prop

Info

Publication number
GB1349487A
GB1349487A GB3601971A GB3601971A GB1349487A GB 1349487 A GB1349487 A GB 1349487A GB 3601971 A GB3601971 A GB 3601971A GB 3601971 A GB3601971 A GB 3601971A GB 1349487 A GB1349487 A GB 1349487A
Authority
GB
United Kingdom
Prior art keywords
extension
inner tube
tube
tubular member
prop
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
GB3601971A
Other languages
English (en)
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.)
Salzgitter Maschinen AG
Original Assignee
Salzgitter Maschinen 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
Priority claimed from DE19702039569 external-priority patent/DE2039569B2/de
Priority claimed from DE19702051037 external-priority patent/DE2051037B2/de
Application filed by Salzgitter Maschinen AG filed Critical Salzgitter Maschinen AG
Publication of GB1349487A publication Critical patent/GB1349487A/en
Expired legal-status Critical Current

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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/526—Extensible units located above or below standard props for step-by-step extension of the prop

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Earth Drilling (AREA)
GB3601971A 1970-08-08 1971-07-30 Pit prop Expired GB1349487A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702039569 DE2039569B2 (de) 1970-08-08 1970-08-08 Stempelverlaengerungsvorrichtung
DE19702051037 DE2051037B2 (de) 1970-10-17 1970-10-17 Stempelverlaengerungsvorrichtung

Publications (1)

Publication Number Publication Date
GB1349487A true GB1349487A (en) 1974-04-03

Family

ID=25759563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3601971A Expired GB1349487A (en) 1970-08-08 1971-07-30 Pit prop

Country Status (3)

Country Link
FR (1) FR2101930A5 (https=)
GB (1) GB1349487A (https=)
PL (1) PL70887B1 (https=)

Also Published As

Publication number Publication date
PL70887B1 (https=) 1974-04-30
FR2101930A5 (https=) 1972-03-31

Similar Documents

Publication Publication Date Title
GB1037686A (en) Hydraulic operated mine prop
GB1349487A (en) Pit prop
GB1005991A (en) Floating roof liquid storage tank
GB530505A (en) Improved telescopic tubular props, struts, and like supports, and telescopic tubes in general
GB449967A (en) Improved means for supporting roofs of mines and other underground roadways
GB451680A (en) Improvements in display stands and other adjustably supported devices
GB1204812A (en) Improvements in or relating to telescopic hydraulic mine roof chocks
GB1218616A (en) Improvements to mine props
GB1258990A (https=)
GB1190775A (en) Improvements in or relating to Fluid Operated Jacks
GB1024262A (en) A mine roof hydraulic support element
GB867714A (en) Extensible rod
ES158547U (es) Punta metalico hidraulico de bloqueo automatico.
GB874999A (en) Hydraulic telescopic pit props
ES157034U (es) Par de apoyos complementarios para plataforma remolcada.
GB968668A (en) Improvements in or relating to chocks, props and roof supports for mines and the like
GB1261866A (en) Drawing compasses
ES187663U (es) Pertiga telescopica perfeccionada para apuntalamiento de marcos.
GB510607A (en) Improvements in or relating to fountain pens
GB1037142A (en) Improvements relating to friction-type pit props
ES184658U (es) Guia para la suspension de cortinas con una varilla tubular .
GB743199A (en) Improvements in hydraulic pit props
ES225961A1 (es) NUEVO AMORTIGUADOR HIDRáULICO TELESCoPICO PARA AUTOMoVILES EN GENERAL
ES354072A1 (es) Perfeccionamientos introducidos en los elevadores oleohi- draulicos del tipo telescopico.
GB296290A (en) Improved tubular pit prop or strut

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee