GB1124096A - Hydraulically operated telescopic props - Google Patents

Hydraulically operated telescopic props

Info

Publication number
GB1124096A
GB1124096A GB42432/65A GB4243265A GB1124096A GB 1124096 A GB1124096 A GB 1124096A GB 42432/65 A GB42432/65 A GB 42432/65A GB 4243265 A GB4243265 A GB 4243265A GB 1124096 A GB1124096 A GB 1124096A
Authority
GB
United Kingdom
Prior art keywords
stage
prop
holding means
oct
serve
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
GB42432/65A
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.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Publication of GB1124096A publication Critical patent/GB1124096A/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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Food-Manufacturing Devices (AREA)
  • Earth Drilling (AREA)

Abstract

1,124,096. Multi-stage pit props. GEWERKSCHAFT EISENHUTTE WESTFALIA. 6 Oct., 1965 [20 Oct., 1964; 5 March, 1965], No. 42432/65. Heading E1E. [Also in Division B8] An hydraulic telescopic - prop for mineral mining comprises an outer prop part 1, an outer stage 5, an inner stage 10 and a non- return valve 26 (shown only in Fig. 5) between the inner and outer stages 10, 5. The outer stage 5 is restrained from full extension by holding means until the inner stage 10 has contacted the load. As shown in Fig. 1 chains 3 extending from hooks 2 on the outer prop part 1 to the outer stage 5 constitute the holding means. Fig. 3a shows a prop with a brake sleeve 8 used as the holding means. Fig. 5 shows a prop wherein an annular space 17 can be used in known manner by appropriate hydraulic charging to serve as retraction aid for the outer stage 5 and to serve as the holding means.
GB42432/65A 1964-10-20 1965-10-06 Hydraulically operated telescopic props Expired GB1124096A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG41819A DE1226972B (en) 1964-10-20 1964-10-20 Hydraulic double telescopic ram
DEG0043012 1965-03-05

Publications (1)

Publication Number Publication Date
GB1124096A true GB1124096A (en) 1968-08-21

Family

ID=27210640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42432/65A Expired GB1124096A (en) 1964-10-20 1965-10-06 Hydraulically operated telescopic props

Country Status (6)

Country Link
US (1) US3301519A (en)
BE (1) BE671064A (en)
DE (1) DE1226972B (en)
FR (1) FR1459137A (en)
GB (1) GB1124096A (en)
NL (1) NL6513272A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS481663U (en) * 1971-06-01 1973-01-10

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA804072B (en) * 1979-08-07 1981-06-24 Dobson Park Ind Telescoping jack
US5219429A (en) * 1992-08-10 1993-06-15 Shelton Bill E Hydra-lift system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1928533A (en) * 1933-01-20 1933-09-26 Milford T Goss Jack
DE1063101B (en) * 1956-02-20 1959-08-13 Gutehoffnungshuette Sterkrade Hydraulic pit ram
DE1123640B (en) * 1957-12-23 1962-02-15 Kloeckner Werke Ag Double extendable hydraulic pit ram
BE607500A (en) * 1960-09-02
DE1149678B (en) * 1960-09-15 1963-06-06 Rheinstahl Gmbh Wanheim Multi-stage hydraulic pit ram
NL274871A (en) * 1961-02-18
BE632029A (en) * 1962-05-12
BE655844A (en) * 1963-11-29 1965-03-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS481663U (en) * 1971-06-01 1973-01-10

Also Published As

Publication number Publication date
FR1459137A (en) 1966-11-18
BE671064A (en) 1966-04-19
NL6513272A (en) 1966-04-21
DE1226972B (en) 1966-10-20
US3301519A (en) 1967-01-31

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