GB874183A - Improvements in or relating to hydraulic pressure chambers - Google Patents

Improvements in or relating to hydraulic pressure chambers

Info

Publication number
GB874183A
GB874183A GB3843/58A GB384358A GB874183A GB 874183 A GB874183 A GB 874183A GB 3843/58 A GB3843/58 A GB 3843/58A GB 384358 A GB384358 A GB 384358A GB 874183 A GB874183 A GB 874183A
Authority
GB
United Kingdom
Prior art keywords
chamber
pressure
relating
hydraulic pressure
pressure chambers
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
GB3843/58A
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.)
EBERHARD VON CAMPENHAUSEN
WILLEY EGGEMAN
Original Assignee
EBERHARD VON CAMPENHAUSEN
WILLEY EGGEMAN
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 EBERHARD VON CAMPENHAUSEN, WILLEY EGGEMAN filed Critical EBERHARD VON CAMPENHAUSEN
Publication of GB874183A publication Critical patent/GB874183A/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

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)
  • Press Drives And Press Lines (AREA)
  • Actuator (AREA)
  • Earth Drilling (AREA)

Abstract

874,183. Hydraulic jacks. EGGEMANN, W., and CAMPENHAUSEN, EBERHARD, VON, [trading as SCHWARZ KOMM.-GES., HERMANN]. Feb. 6, 1958 [Feb. 11, 1957], No. 3843/58. Class 78 (3). [Also in Group X] In an hydraulic pit prop in which a pressure chamber 10 is provided with a release valve 12 held closed by the pressure in the chamber, means is provided for reducing the pressure in the chamber so that the valve may be more easily opened by an operating lever 17. The means comprises a cylindrical chamber 20 into which fluid from the chamber 10 passes when a piston 21 therein is freed for outward movement by manual operation of a cam 23.
GB3843/58A 1957-02-11 1958-02-06 Improvements in or relating to hydraulic pressure chambers Expired GB874183A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE874183X 1957-02-11

Publications (1)

Publication Number Publication Date
GB874183A true GB874183A (en) 1961-08-02

Family

ID=6816796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3843/58A Expired GB874183A (en) 1957-02-11 1958-02-06 Improvements in or relating to hydraulic pressure chambers

Country Status (1)

Country Link
GB (1) GB874183A (en)

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