FR2322319B1 - - Google Patents

Info

Publication number
FR2322319B1
FR2322319B1 FR7625142A FR7625142A FR2322319B1 FR 2322319 B1 FR2322319 B1 FR 2322319B1 FR 7625142 A FR7625142 A FR 7625142A FR 7625142 A FR7625142 A FR 7625142A FR 2322319 B1 FR2322319 B1 FR 2322319B1
Authority
FR
France
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
FR7625142A
Other languages
French (fr)
Other versions
FR2322319A1 (fr
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.)
Saarbergwerke AG
Original Assignee
Saarbergwerke AG
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 Saarbergwerke AG filed Critical Saarbergwerke AG
Publication of FR2322319A1 publication Critical patent/FR2322319A1/fr
Application granted granted Critical
Publication of FR2322319B1 publication Critical patent/FR2322319B1/fr
Granted legal-status Critical Current

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
    • 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

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)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Control Of Presses (AREA)
  • Safety Valves (AREA)
FR7625142A 1975-08-23 1976-08-16 Soupape de detente reliant les deux verins d'un etancon hydraulique telescopique a deux etages Granted FR2322319A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752537715 DE2537715C3 (de) 1975-08-23 1975-08-23 Druckminderventilanordnung und -ausbildung für die Verbindung der beiden Druckräume eines zweistufigen teleskopischen Grubenstempels

Publications (2)

Publication Number Publication Date
FR2322319A1 FR2322319A1 (fr) 1977-03-25
FR2322319B1 true FR2322319B1 (es) 1982-05-14

Family

ID=5954757

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7625142A Granted FR2322319A1 (fr) 1975-08-23 1976-08-16 Soupape de detente reliant les deux verins d'un etancon hydraulique telescopique a deux etages

Country Status (3)

Country Link
DE (1) DE2537715C3 (es)
FR (1) FR2322319A1 (es)
GB (1) GB1553682A (es)

Families Citing this family (3)

* 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
GB2176845B (en) * 1985-06-21 1989-04-26 600 Group Plc The Improvements in telescopic devices such as crane jibs
US4834135A (en) * 1988-11-01 1989-05-30 Sun Hydraulics Corp. Pressure control valve

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2359017A (en) * 1942-03-04 1944-09-26 Landis Tool Co Relief valve
DE932784C (de) * 1949-12-28 1955-09-08 Doering G M B H Hydraulischer Grubenstempel mit Pressluftbedienung
FR1112062A (fr) * 1954-04-12 1956-03-08 Klockner Bergbau Victor Ickern Installation pour le soutènement progressif à l'avancement de travaux souterrains ou analogues
GB882802A (en) * 1958-09-09 1961-11-22 Bwg Bergwerk Walzwerk Improvements in and relating to telescopic hydraulic pit-prop
FR78068E (fr) * 1960-06-11 1962-06-01 Gutehoffnungshuette Sterkrade étançon de mine télescopique hydraulique en plusieurs parties
US3329250A (en) * 1965-03-02 1967-07-04 May Pressenbau Gmbh Overload safety device for presses
GB1368654A (en) * 1971-03-11 1974-10-02 Bergwerksverband Gmbh Pneumatically-operated valve for use with for example hydraulic cylinders used in consolidating means for mineworkings
DE2146502C3 (de) * 1971-09-17 1982-04-29 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Ventilanordnung zum Setzen hydraulischer Grubenstempel mit hoher Setzkraft
FR2264462A7 (en) * 1974-02-18 1975-10-10 Midi Houilleres Loire Hou Cent Safety valve for hydraulic mine prop - has truncated conical spring loaded piston and radial outlets
DE2447425B2 (de) * 1974-10-04 1976-07-29 Hermann Hemscheidt Maschinenfabrik, 5600 Wuppertal Steuerventil fuer hydraulisch schreitenden strebausbau

Also Published As

Publication number Publication date
DE2537715A1 (de) 1977-03-03
GB1553682A (en) 1979-09-26
FR2322319A1 (fr) 1977-03-25
DE2537715B2 (de) 1980-03-13
DE2537715C3 (de) 1980-11-06

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Legal Events

Date Code Title Description
ST Notification of lapse