GB1225807A - - Google Patents

Info

Publication number
GB1225807A
GB1225807A GB1225807DA GB1225807A GB 1225807 A GB1225807 A GB 1225807A GB 1225807D A GB1225807D A GB 1225807DA GB 1225807 A GB1225807 A GB 1225807A
Authority
GB
United Kingdom
Prior art keywords
pump
piston
motor
valve
load current
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
Other languages
English (en)
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 filed Critical
Publication of GB1225807A publication Critical patent/GB1225807A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
    • E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
    • E21C29/14—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
    • E21C29/16—Winches or other means for pulling cable or chain

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
GB1225807D 1967-06-13 1968-06-12 Expired GB1225807A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1533664 1967-06-13

Publications (1)

Publication Number Publication Date
GB1225807A true GB1225807A (enrdf_load_stackoverflow) 1971-03-24

Family

ID=5675678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225807D Expired GB1225807A (enrdf_load_stackoverflow) 1967-06-13 1968-06-12

Country Status (1)

Country Link
GB (1) GB1225807A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475112A1 (fr) * 1980-02-02 1981-08-07 Gewerk Eisenhuette Westfalia Dispositif d'abattage pour exploitation miniere de fond avec regulation de la commande d'avance
US4322113A (en) 1979-06-22 1982-03-30 Coal Industry (Patents) Limited Excavating machines for excavating rock and minerals having first and second alternative modes of control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322113A (en) 1979-06-22 1982-03-30 Coal Industry (Patents) Limited Excavating machines for excavating rock and minerals having first and second alternative modes of control
FR2475112A1 (fr) * 1980-02-02 1981-08-07 Gewerk Eisenhuette Westfalia Dispositif d'abattage pour exploitation miniere de fond avec regulation de la commande d'avance

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees