GB845907A - Hydraulic pit props - Google Patents

Hydraulic pit props

Info

Publication number
GB845907A
GB845907A GB1426257A GB1426257A GB845907A GB 845907 A GB845907 A GB 845907A GB 1426257 A GB1426257 A GB 1426257A GB 1426257 A GB1426257 A GB 1426257A GB 845907 A GB845907 A GB 845907A
Authority
GB
United Kingdom
Prior art keywords
prop
pressure chamber
wiemann
reservoir
pipe
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
GB1426257A
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.)
EWALD WILHELM WIEMANN
Original Assignee
EWALD WILHELM WIEMANN
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 EWALD WILHELM WIEMANN filed Critical EWALD WILHELM WIEMANN
Publication of GB845907A publication Critical patent/GB845907A/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
    • 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
    • E21D15/50—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
    • 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

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)
  • Check Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

845,907. Hydraulic pit props. WIEMANN, E. W., [trading as MASCHINENFABRIK E. WIEMANN]. May 3, 1957 [May 3, 1956], No. 14262/57. Class 20(2) [Also in Group XXIX] In a hydraulic telescopic pit prop having a non-turn valve 4 allowing fluid to flow from the reservoir 1 to the pressure chamber 2 when the prop is extended by hand, the excess pressure relief valve 12 is adjustably and removably mounted in a plug cock 7 which is adapted to release fluid from the prop pressure chamber by a pipe 5 and a passage 10 to the reservoir to withdraw the prop. The cock 7 is operated by a key 16 and a quick screw thread 8. The relief valve comprises a spring-pressed ball valve held in position by a screw plug 121. Additional fluid may be pumped into the pressure chamber by means of a pipe 5<SP>1</SP>.
GB1426257A 1956-05-03 1957-05-03 Hydraulic pit props Expired GB845907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM30421A DE1047150B (en) 1956-05-03 1956-05-03 Hydraulic pit ram

Publications (1)

Publication Number Publication Date
GB845907A true GB845907A (en) 1960-08-24

Family

ID=7300959

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1426257A Expired GB845907A (en) 1956-05-03 1957-05-03 Hydraulic pit props

Country Status (4)

Country Link
BE (1) BE557179A (en)
DE (1) DE1047150B (en)
FR (1) FR1174801A (en)
GB (1) GB845907A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231648B (en) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulic expansion element, especially for underground mining operations
DE1189938B (en) * 1962-08-31 1965-04-01 Kloeckner Werke Ag Hydraulic pit ram
US3154290A (en) * 1963-03-11 1964-10-27 William O Johnson Trailer-type hydraulic lift
BR7604063A (en) * 1975-08-13 1977-06-28 Kraftwerk Union Ag NUCLEAR REACTOR INSTALLATION

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE807083C (en) * 1950-03-07 1951-06-25 Josef Brand Hydraulic pit ram

Also Published As

Publication number Publication date
BE557179A (en)
FR1174801A (en) 1959-03-17
DE1047150B (en) 1958-12-24

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