GB780475A - Improvements in or relating to hydraulic pit props - Google Patents

Improvements in or relating to hydraulic pit props

Info

Publication number
GB780475A
GB780475A GB956453A GB956453A GB780475A GB 780475 A GB780475 A GB 780475A GB 956453 A GB956453 A GB 956453A GB 956453 A GB956453 A GB 956453A GB 780475 A GB780475 A GB 780475A
Authority
GB
United Kingdom
Prior art keywords
reservoir
piston
prop
april
passage
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
GB956453A
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.)
EISENWERK WANHEIM GmbH
Original Assignee
EISENWERK WANHEIM GmbH
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 EISENWERK WANHEIM GmbH filed Critical EISENWERK WANHEIM GmbH
Publication of GB780475A publication Critical patent/GB780475A/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
    • E21D15/50—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/061—Mechanical slub catcher and detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Pens And Brushes (AREA)
  • Check Valves (AREA)
GB956453A 1952-04-26 1953-04-08 Improvements in or relating to hydraulic pit props Expired GB780475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE5389A DE922525C (de) 1952-04-26 1952-04-26 Hydraulischer Grubenstempel

Publications (1)

Publication Number Publication Date
GB780475A true GB780475A (en) 1957-08-07

Family

ID=6688673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB956453A Expired GB780475A (en) 1952-04-26 1953-04-08 Improvements in or relating to hydraulic pit props

Country Status (4)

Country Link
BE (1) BE519073A (enrdf_load_stackoverflow)
DE (1) DE922525C (enrdf_load_stackoverflow)
FR (2) FR1075743A (enrdf_load_stackoverflow)
GB (1) GB780475A (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB746862A (en) * 1953-09-04 1956-03-21 Dowty Hydraulic Units Ltd Improvements in hydraulic pit props
BE558743A (enrdf_load_stackoverflow) * 1956-07-05
DE1078516B (de) * 1956-07-17 1960-03-31 Bwg Bergwerk Walzwerk Nachgiebiger hydraulischer Grubenstempel
DE1216057B (de) * 1959-03-05 1966-05-05 Bosch Gmbh Robert UEberdruckventil
DE1094067B (de) * 1958-06-25 1960-12-01 Bwg Bergwerk Walzwerk UEberdruckventil, insbesondere fuer hydraulische Grubenstempel
DE1191777B (de) * 1962-03-21 1965-04-29 Salzgitter Maschinen Ag Hydraulischer Ausbaurahmen fuer Strebabbaue unter Tage

Also Published As

Publication number Publication date
FR1075743A (fr) 1954-10-19
DE922525C (de) 1955-01-17
BE519073A (enrdf_load_stackoverflow) 1953-04-30
FR1075793A (fr) 1954-10-20

Similar Documents

Publication Publication Date Title
GB877869A (en) Improvements relating to hydraulic piston apparatus
GB1232598A (enrdf_load_stackoverflow)
US3656411A (en) Telescopic props
GB780475A (en) Improvements in or relating to hydraulic pit props
GB843354A (en) Improvements in hydraulically operated supporting devices
GB864032A (en) Improvements relating to hydraulic pit props or the like
GB866239A (en) Improvements in or relating to pit props
GB736431A (en) Improvements in or relating to vehicle shock absorbers
GB793803A (en) Improvements in or relating to props, especially for use in coal mines
GB1437071A (en) Telescopic props
GB794064A (en) Improvements in or relating to hydraulic pit props
GB794547A (en) Improvements in or relating to extensible pit-props
GB847384A (en) Improvements in or relating to prop support systems for mines
GB1382378A (en) Fluid pressure operated actuator
GB894292A (en) Improvements in or relating to hydraulic props, particularly pit props
GB916936A (en) Improvements in or relating to extensible mine support elements
GB822162A (en) Improvements relating to hydraulic pit props
GB1351178A (en) Hydraulic jacks
GB954676A (en) Telescopic hydraulic props
GB893340A (en) Improvements in or relating to hydraulic props
GB1026136A (en) Hydraulic pit prop with extended lift
GB767551A (en) Improvements in or relating to hydraulic shock absorbers
GB781004A (en) Improvements in or relating to adjustable hydraulic mine props
GB743857A (en) Improvements in or relating to aircraft undercarriages
DE825054C (de) Aus einem Niederdruckraum und einem Hochdruckraum bestehender Hauptzylinder fuer hydraulische Brems- oder Betaetigungsanlagen, insbesondere fuer hydraulische Bremseinrichtungen an Kraftfahrzeugen