GB875249A - Hydraulic pitprop - Google Patents

Hydraulic pitprop

Info

Publication number
GB875249A
GB875249A GB2998759A GB2998759A GB875249A GB 875249 A GB875249 A GB 875249A GB 2998759 A GB2998759 A GB 2998759A GB 2998759 A GB2998759 A GB 2998759A GB 875249 A GB875249 A GB 875249A
Authority
GB
United Kingdom
Prior art keywords
valve
prop
pitprop
hydraulic
toggle
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
GB2998759A
Other languages
English (en)
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.)
MIJ TOT EXPLOITATIE VAN HYDRAU
Original Assignee
MIJ TOT EXPLOITATIE VAN HYDRAU
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 MIJ TOT EXPLOITATIE VAN HYDRAU filed Critical MIJ TOT EXPLOITATIE VAN HYDRAU
Publication of GB875249A publication Critical patent/GB875249A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
    • 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
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/14—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with ball-shaped valve member
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manipulator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Braking Arrangements (AREA)
  • Fluid-Damping Devices (AREA)
GB2998759A 1958-11-24 1959-09-02 Hydraulic pitprop Expired GB875249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE453812 1958-11-24

Publications (1)

Publication Number Publication Date
GB875249A true GB875249A (en) 1961-08-16

Family

ID=47144160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2998759A Expired GB875249A (en) 1958-11-24 1959-09-02 Hydraulic pitprop

Country Status (4)

Country Link
DE (1) DE1182183B (enrdf_load_stackoverflow)
FR (1) FR1247509A (enrdf_load_stackoverflow)
GB (1) GB875249A (enrdf_load_stackoverflow)
NL (3) NL267759A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307021A (zh) * 2019-07-29 2019-10-08 石家庄博安煤矿机械制造有限公司 一种煤矿用液压支撑装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE486663A (enrdf_load_stackoverflow) * 1948-01-12
DE923244C (de) * 1951-12-11 1955-02-07 Eugen Bellmann Hydraulischer Stempel, insbesondere Grubenstempel
NL191038A (enrdf_load_stackoverflow) * 1953-09-24 1900-01-01
DE1009139B (de) * 1955-12-30 1957-05-29 Hermann Schwarz Kommanditgesel Zweiteiliger metallischer Grubenstempel mit einer durch Reibungsschluss unter elastischer Verformung erfolgenden Verspannung der Stempelteile und Verfahren zum Setzen
BE557124A (enrdf_load_stackoverflow) * 1956-05-01
BE560360A (enrdf_load_stackoverflow) * 1956-08-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307021A (zh) * 2019-07-29 2019-10-08 石家庄博安煤矿机械制造有限公司 一种煤矿用液压支撑装置
CN110307021B (zh) * 2019-07-29 2024-01-12 石家庄博安煤矿机械制造有限公司 一种煤矿用液压支撑装置

Also Published As

Publication number Publication date
NL267759A (enrdf_load_stackoverflow) 1965-06-25
DE1182183B (de) 1964-11-26
NL233516A (enrdf_load_stackoverflow) 1965-06-25
NL110999C (enrdf_load_stackoverflow)
FR1247509A (fr) 1960-12-02

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