NL76043C - - Google Patents

Info

Publication number
NL76043C
NL76043C NL143867A NL143867A NL76043C NL 76043 C NL76043 C NL 76043C NL 143867 A NL143867 A NL 143867A NL 143867 A NL143867 A NL 143867A NL 76043 C NL76043 C NL 76043C
Authority
NL
Netherlands
Application number
NL143867A
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 GB92548A external-priority patent/GB636568A/en
Application filed filed Critical
Application granted granted Critical
Publication of NL76043C publication Critical patent/NL76043C/xx

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
    • E21D15/60—Devices for withdrawing props or chocks
    • 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

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)
  • Safety Valves (AREA)
  • Control Of Presses (AREA)
NL143867A 1948-01-12 1948-12-15 NL76043C (en:Method)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB92548A GB636568A (en) 1953-07-20 1948-01-12 Improvements in pit props and other telescopic struts
GB2011253A GB726384A (en) 1953-07-20 1953-07-20 Improvements in pit props and other telescopic struts

Publications (1)

Publication Number Publication Date
NL76043C true NL76043C (en:Method) 1954-05-15

Family

ID=32299627

Family Applications (1)

Application Number Title Priority Date Filing Date
NL143867A NL76043C (en:Method) 1948-01-12 1948-12-15

Country Status (5)

Country Link
US (1) US2621631A (en:Method)
BE (1) BE486663A (en:Method)
DE (1) DE808225C (en:Method)
FR (2) FR978701A (en:Method)
NL (1) NL76043C (en:Method)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1072941B (de) * 1960-01-14 -Ing H Joe Rheinbay Marienheide Dipl (RhId) Hydraulisch betätigter mit einem durch Atmosphären- oder Preßluftdruck beauf schlagten Schwimmkolben ausgerüsteter Grubenstempel
US2899976A (en) * 1959-08-18 Release relief valve
GB700790A (en) * 1951-07-19 1953-12-09 Dowty Auto Units Ltd Improvements relating to valves
US2888231A (en) * 1952-05-27 1959-05-26 Mining Engineering Co Ltd Roof supports
US2888230A (en) * 1952-06-16 1959-05-26 Mining Engineering Co Ltd Roof supports
GB746862A (en) * 1953-09-04 1956-03-21 Dowty Hydraulic Units Ltd Improvements in hydraulic pit props
BE532039A (en:Method) * 1953-09-24 1900-01-01
GB767012A (en) * 1953-11-12 1957-01-30 Coal Industry Patents Ltd Improvements in or relating to pit or like props
BE548513A (en:Method) * 1955-06-10
DE1131625B (de) * 1955-08-13 1962-06-20 Kronprinz Ag Hydraulischer Grubenstempel
BE552440A (en:Method) * 1955-12-13
DE1062654B (de) * 1956-04-03 1959-08-06 Kloeckner Bergbau Viktor Icker Hydraulischer Grubenstempel
DE1081848B (de) * 1956-06-28 1960-05-19 Becorit Grubenausbau Gmbh Hydraulischer Grubenstempel
GB837916A (en) * 1957-01-31 1960-06-15 Dowty Mining Equipment Ltd Improvements relating to telescopic tubular pit props
DE1108157B (de) * 1957-02-11 1961-06-08 Hermann Schwarz K G Druckmittelraum fuer Elemente des Grubenausbaus
GB894292A (en) * 1957-07-30 1962-04-18 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic props, particularly pit props
DE1061273B (de) * 1958-01-13 1959-07-16 Kloeckner Bergbau Victor Icker Hydraulischer Grubenstempel
GB862033A (en) * 1958-10-29 1961-03-01 Mastabar Mining Equip Co Ltd Improvements in or relating to extensible hydraulic supports
NL233516A (en:Method) * 1958-11-24 1965-06-25
US2996888A (en) * 1959-01-26 1961-08-22 Raymond Int Inc Hydraulic pile puller
NL248713A (en:Method) * 1959-02-23
GB962542A (en) * 1959-08-21 1964-07-01 Acrow Eng Ltd Improvements in and relating to hydraulic props
US3134398A (en) * 1960-06-17 1964-05-26 Acrow Eng Ltd Hydraulic prop valve
DE1137406B (de) * 1960-06-30 1962-10-04 Kronprinz Ag Hydraulischer Grubenstempel
FR1280684A (fr) * 1960-11-22 1962-01-08 Sagem étançon hydraulique
GB954676A (en) * 1960-12-22 1964-04-08 Dowty Mining Equipment Ltd Telescopic hydraulic props
DE1215635B (de) * 1963-11-29 1966-05-05 Rheinstahl Gmbh Wanheim Reibungsstempel mit hydraulischer Setz- und Spannvorrichtung
GB1080831A (en) * 1964-01-17 1967-08-23 Soc Anglo Belge Vulcain Sa Nuclear reactor control mechanism
DE2603978C3 (de) * 1976-02-03 1982-10-14 Thyssen Industrie Ag, 4300 Essen Gebirgsschlagventilanordnung in einem hydraulischen Grubenstempel
US4237769A (en) * 1978-04-03 1980-12-09 Commercial Shearing, Inc. Relief valves and mine props incorporating the same
ZA785167B (en) * 1978-09-12 1979-08-29 Bochumer Eisen Heintzmann A hydraulic mine prop
DE8808519U1 (de) * 1988-07-04 1989-11-02 Heiliger, Martha-Catharina, 5166 Kreuzau Hydraulischer Stahlgrubenstempel
DE9005343U1 (de) * 1990-05-11 1990-08-30 Heiliger, Robert Wilhelm, 5166 Kreuzau Hydraulischer Stahlgrubenstempel
DE4140317C2 (de) * 1991-12-06 1995-03-23 Vos Richard Grubenausbau Gmbh Ventilanordnung für den Einzelstempelausbau im untertägigen Berg- und Tunnelbau
US5720581A (en) * 1993-05-07 1998-02-24 Dorbyl Limited Support prop
DE4323462C2 (de) * 1993-07-14 1995-05-04 Vos Richard Grubenausbau Gmbh Ausbaustempel für den Untertageeinsatz mit integriertem Druckbegrenzungsventil
US20120148350A1 (en) * 2010-12-10 2012-06-14 Kenneth Poulson Mine prop jack and method of prestressing a mine prop
CN106499421B (zh) * 2016-11-03 2019-01-08 中国矿业大学 一种机械式恒阻单体支柱回撤工艺与回收方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US151670A (en) * 1874-06-02 Improvement in hydraulic lifting-jacks
US1133270A (en) * 1913-05-03 1915-03-30 Charles E Dale Pump appliance.
US1598426A (en) * 1925-07-03 1926-08-31 Ingersoll Rand Co Shank and bit punch
US1805588A (en) * 1926-01-05 1931-05-19 Manley Mfg Company Hydraulic jack
US1706309A (en) * 1927-02-04 1929-03-19 May Sumner Hydraulic and other fluid pressure lifting jack
US2284228A (en) * 1940-03-18 1942-05-26 Herbert E Page Pressure multiplying mechanism

Also Published As

Publication number Publication date
US2621631A (en) 1952-12-16
FR69104E (fr) 1958-10-01
DE808225C (de) 1951-07-12
BE486663A (en:Method)
FR978701A (fr) 1951-04-17

Similar Documents

Publication Publication Date Title
FR965814A (en:Method)
FR965092A (en:Method)
IT454336A (en:Method)
FR965486A (en:Method)
BE482724A (en:Method)
BE483030A (en:Method)
NL78373C (en:Method)
NL72545C (en:Method)
NL69348C (en:Method)
LU29721A1 (en:Method)
LU29631A1 (en:Method)
NL76043C (en:Method)
BE481488A (en:Method)
BE479713A (en:Method)
BE500795A (en:Method)
BE490083A (en:Method)
BE489277A (en:Method)
BE485891A (en:Method)
BE482415A (en:Method)
BE482939A (en:Method)
BE482897A (en:Method)
BE482754A (en:Method)
BE482739A (en:Method)
NL90583C (en:Method)
BE482555A (en:Method)