GB899874A - Improvements relating to hydraulic pit-props and like supporting devices - Google Patents

Improvements relating to hydraulic pit-props and like supporting devices

Info

Publication number
GB899874A
GB899874A GB2908158A GB2908158A GB899874A GB 899874 A GB899874 A GB 899874A GB 2908158 A GB2908158 A GB 2908158A GB 2908158 A GB2908158 A GB 2908158A GB 899874 A GB899874 A GB 899874A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
props
improvements relating
supporting devices
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
GB2908158A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade 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
Application filed by Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Publication of GB899874A publication Critical patent/GB899874A/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
    • E21D15/50—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
    • E21D15/512—Arrangement of valves

Abstract

899,874. Valves. GUTEHOFFNUNGSHUTTE STERKRADE A.G. Sept. 10, 1958 [Sept. 13, 1957], No. 29081/58. Class 135. A valve unit for an hydraulic pitprop comprises a combined inlet and pressure release valve 9 and a pressure relief valve 13 mounted in an elongated housing 2 having a lateral outlet 20. The valve 9 is opened against a spring 11 by pressure fluid supplied to a nozzle 3 or manually through a hand-lever connected to a lug 15. The valve 13 is mounted on an adjustable and extensible stem 12 and opens when the pressure of fluid passing through openings 20, 18 is excessive.
GB2908158A 1957-09-13 1958-09-10 Improvements relating to hydraulic pit-props and like supporting devices Expired GB899874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG22924A DE1132073B (en) 1957-09-13 1957-09-13 Valve arrangement for hydraulic pit rams

Publications (1)

Publication Number Publication Date
GB899874A true GB899874A (en) 1962-06-27

Family

ID=7122067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2908158A Expired GB899874A (en) 1957-09-13 1958-09-10 Improvements relating to hydraulic pit-props and like supporting devices

Country Status (4)

Country Link
BE (1) BE571152A (en)
DE (1) DE1132073B (en)
FR (1) FR1202560A (en)
GB (1) GB899874A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183012A (en) * 1985-11-15 1987-05-28 Hemscheidt Maschf Hermann A change-over valve for hydraulic walking mine-roof supports
US5372529A (en) * 1991-03-26 1994-12-13 Binversie; Gregory J. Trim assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1050951A (en) * 1963-01-26
DE1278377B (en) * 1964-08-12 1968-09-26 Gullick Ltd Extension element, especially for longwall mining in underground mining operations
FR2599806B1 (en) * 1986-06-10 1988-11-04 Douaisis Sabes Stephanoise VALVE FOR FLUID ETANCON OR THE LIKE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL192698A (en) * 1953-12-02 1900-01-01
DE1062654B (en) * 1956-04-03 1959-08-06 Kloeckner Bergbau Viktor Icker Hydraulic pit ram

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183012A (en) * 1985-11-15 1987-05-28 Hemscheidt Maschf Hermann A change-over valve for hydraulic walking mine-roof supports
US5372529A (en) * 1991-03-26 1994-12-13 Binversie; Gregory J. Trim assembly

Also Published As

Publication number Publication date
DE1132073B (en) 1962-06-28
FR1202560A (en) 1960-01-12
BE571152A (en)

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