GB981619A - Hydraulic prop - Google Patents

Hydraulic prop

Info

Publication number
GB981619A
GB981619A GB4068261A GB4068261A GB981619A GB 981619 A GB981619 A GB 981619A GB 4068261 A GB4068261 A GB 4068261A GB 4068261 A GB4068261 A GB 4068261A GB 981619 A GB981619 A GB 981619A
Authority
GB
United Kingdom
Prior art keywords
prop
nov
see
hydraulic prop
hydraulic pit
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
GB4068261A
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.)
Sagem SA
Original Assignee
Sagem SA
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 to FR844641A priority Critical patent/FR1280684A/en
Application filed by Sagem SA filed Critical Sagem SA
Publication of GB981619A publication Critical patent/GB981619A/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/44Hydraulic, pneumatic, or hydraulic-pneumatic props
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/58Devices for setting props or chocks
    • E21D15/585Devices 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
    • E21D15/586Devices 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 the props being pre-loaded

Abstract

981,619. Hydraulic pit props. SOC. D' APPLICATIONS GENERALES D'ELECTRICITE ET DE MECANIQUE SAGEM. Nov. 14, 1961 [Nov. 22, 1960], No. 40682/61. Heading E1E. An hydraulic pit prop is provided with a combined charging and release valve 14, 15, 22 adapted to be held in the discharge position by a chain-operated lever 21 which is releasably positioned on the prop to permit attachment of a pressure line, see Fig. 4 (not shown) a calibrated pressure-relief valve being disposed in the roof cap, see Fig. 2 (not shown).
GB4068261A 1960-11-22 1961-11-14 Hydraulic prop Expired GB981619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR844641A FR1280684A (en) 1960-11-22 1960-11-22 hydraulic prop

Publications (1)

Publication Number Publication Date
GB981619A true GB981619A (en) 1965-01-27

Family

ID=8743198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4068261A Expired GB981619A (en) 1960-11-22 1961-11-14 Hydraulic prop

Country Status (4)

Country Link
BE (1) BE610401A (en)
DE (1) DE1199218B (en)
FR (1) FR1280684A (en)
GB (1) GB981619A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474112A1 (en) * 1980-01-21 1981-07-24 Commercial Shearing LONG-HOLE CYLINDER THAT CAN SERVE MINE ROOF SUPPORT

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1243610B (en) * 1964-07-09 1967-07-06 Hermann Schwarz Kommanditgesel Pressure-operated pit stamp

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685697A (en) * 1926-07-30 1928-09-25 Nathan M Guinsburg Jack
BE486663A (en) * 1948-01-12
DE809903C (en) * 1948-08-25 1951-08-02 Mavor & Coulson Ltd Hydraulic ram for mining operations
DE924142C (en) * 1951-04-08 1955-02-28 Ringfeder Gmbh Pit stamp
DE919525C (en) * 1951-05-01 1954-10-25 Gullick Ltd Hydraulic pit ram
GB700790A (en) * 1951-07-19 1953-12-09 Dowty Auto Units Ltd Improvements relating to valves
GB767561A (en) * 1952-07-15 1957-02-06 Gullick Ltd Improvements in or relating to mining chocks and the like
BE526791A (en) * 1953-02-25
DE1062654B (en) * 1956-04-03 1959-08-06 Kloeckner Bergbau Viktor Icker Hydraulic pit ram
GB891624A (en) * 1958-01-02 1962-03-14 Dowty Mining Equipment Ltd Valves suitable for use as air breather valves in pit props

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474112A1 (en) * 1980-01-21 1981-07-24 Commercial Shearing LONG-HOLE CYLINDER THAT CAN SERVE MINE ROOF SUPPORT

Also Published As

Publication number Publication date
BE610401A (en) 1962-03-16
DE1199218B (en) 1965-08-26
FR1280684A (en) 1962-01-08

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