FR1175841A - Improvements relating to hydraulic mine props - Google Patents

Improvements relating to hydraulic mine props

Info

Publication number
FR1175841A
FR1175841A FR1175841DA FR1175841A FR 1175841 A FR1175841 A FR 1175841A FR 1175841D A FR1175841D A FR 1175841DA FR 1175841 A FR1175841 A FR 1175841A
Authority
FR
France
Prior art keywords
improvements relating
mine props
hydraulic mine
hydraulic
props
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
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.)
Dobson Ltd W E & F
WE&F Dobson Ltd
Original Assignee
Dobson Ltd W E & F
WE&F Dobson 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
Application filed by Dobson Ltd W E & F, WE&F Dobson Ltd filed Critical Dobson Ltd W E & F
Application granted granted Critical
Publication of FR1175841A publication Critical patent/FR1175841A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • B60K35/60—
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/54—Details of the ends of props
FR1175841D 1956-08-01 1957-05-29 Improvements relating to hydraulic mine props Expired FR1175841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23671/56A GB821645A (en) 1956-08-01 1956-08-01 Improvements in or relating to hydraulic pit props

Publications (1)

Publication Number Publication Date
FR1175841A true FR1175841A (en) 1959-04-02

Family

ID=10199397

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1175841D Expired FR1175841A (en) 1956-08-01 1957-05-29 Improvements relating to hydraulic mine props

Country Status (4)

Country Link
BE (1) BE557913A (en)
FR (1) FR1175841A (en)
GB (1) GB821645A (en)
NL (1) NL217834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215091B (en) * 1961-06-29 1966-04-28 Guenther W Hammer Interchangeable stamp shoe for pit stamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8711378D0 (en) * 1987-05-14 1987-06-17 Nichols Hydraulic Products Ltd Applying pressure to closed door

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215091B (en) * 1961-06-29 1966-04-28 Guenther W Hammer Interchangeable stamp shoe for pit stamp

Also Published As

Publication number Publication date
NL217834A (en)
GB821645A (en) 1959-10-14
BE557913A (en) 1957-06-15

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