CS261248B2 - Change-over valve for hydraulic waliking support - Google Patents

Change-over valve for hydraulic waliking support Download PDF

Info

Publication number
CS261248B2
CS261248B2 CS867742A CS774286A CS261248B2 CS 261248 B2 CS261248 B2 CS 261248B2 CS 867742 A CS867742 A CS 867742A CS 774286 A CS774286 A CS 774286A CS 261248 B2 CS261248 B2 CS 261248B2
Authority
CS
Czechoslovakia
Prior art keywords
valve
piston
valve body
bore
sealing
Prior art date
Application number
CS867742A
Other languages
Czech (cs)
English (en)
Other versions
CS774286A2 (en
Inventor
Karl Krieger
Werner Reinelt
Wolfgang Kobow
Original Assignee
Hemscheidt Maschf Hermann
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 Hemscheidt Maschf Hermann filed Critical Hemscheidt Maschf Hermann
Publication of CS774286A2 publication Critical patent/CS774286A2/cs
Publication of CS261248B2 publication Critical patent/CS261248B2/cs

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2564—Plural inflows
    • Y10T137/2567—Alternate or successive inflows

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Damping Devices (AREA)
  • Fluid-Driven Valves (AREA)
  • Check Valves (AREA)
CS867742A 1985-11-15 1986-10-27 Change-over valve for hydraulic waliking support CS261248B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853540531 DE3540531C1 (de) 1985-11-15 1985-11-15 Wechselventil fuer hydraulischen Schreitausbau

Publications (2)

Publication Number Publication Date
CS774286A2 CS774286A2 (en) 1988-05-16
CS261248B2 true CS261248B2 (en) 1989-01-12

Family

ID=6286063

Family Applications (1)

Application Number Title Priority Date Filing Date
CS867742A CS261248B2 (en) 1985-11-15 1986-10-27 Change-over valve for hydraulic waliking support

Country Status (6)

Country Link
US (1) US4757835A (pl)
CS (1) CS261248B2 (pl)
DE (1) DE3540531C1 (pl)
GB (1) GB2183012A (pl)
HU (1) HU194361B (pl)
PL (1) PL153670B1 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101718206B (zh) * 2009-12-15 2012-02-08 胡斌杰 本邻架操作先导换向阀
DE102015102444B4 (de) * 2015-02-20 2017-01-12 Marco Systemanalyse Und Entwicklung Gmbh Verfahren und Vorrichtung zur Bestimmung der Schwenkstellung einer Vorpfändkappe
CN107725081A (zh) * 2017-11-20 2018-02-23 鸿大智能机械有限公司 软密封大流量换向阀
CN107725082A (zh) * 2017-11-20 2018-02-23 鸿大智能机械有限公司 软密封大流量换向阀的压杆总成
CN110259491B (zh) * 2019-07-04 2024-06-11 山东中煤电器有限公司 液压支架用电动直推式换向阀

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL230401A (pl) * 1957-08-13
BE571152A (pl) * 1957-09-13
DE1503364A1 (de) * 1963-06-21 1969-04-17 Landmaschb Rotes Banner Veb Eilgangventil
DE2639331C2 (de) * 1976-09-01 1982-09-23 Wolfgang 7114 Pfedelbach Steinigen Hydraulische oder pneumatische Drei-Wege-Weiche
GB2069578B (en) * 1980-02-14 1983-08-10 Dowty Mining Equipment Ltd Mine roof support system
DE3023890A1 (de) * 1980-06-26 1982-01-14 Udo Ing.(grad.) 7148 Remseck Leikauf Ventil
DE3304982C2 (de) * 1982-05-08 1984-09-13 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Hydraulische Steuerung für ein Schreitausbaugestell

Also Published As

Publication number Publication date
HUT42584A (en) 1987-07-28
CS774286A2 (en) 1988-05-16
PL153670B1 (en) 1991-05-31
PL262369A1 (en) 1988-06-23
US4757835A (en) 1988-07-19
DE3540531C1 (de) 1987-01-08
HU194361B (en) 1988-01-28
GB8625803D0 (en) 1986-12-03
GB2183012A (en) 1987-05-28

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Legal Events

Date Code Title Description
IF00 In force as of 2000-06-30 in czech republic
MK4A Patent expired

Effective date: 20011027