GB708063A - Improvements in or relating to pit props and like supports - Google Patents

Improvements in or relating to pit props and like supports

Info

Publication number
GB708063A
GB708063A GB2854450A GB2854450A GB708063A GB 708063 A GB708063 A GB 708063A GB 2854450 A GB2854450 A GB 2854450A GB 2854450 A GB2854450 A GB 2854450A GB 708063 A GB708063 A GB 708063A
Authority
GB
United Kingdom
Prior art keywords
pit
relating
supports
nov
pad
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
GB2854450A
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.)
Lake and Elliot Ltd
Original Assignee
Lake and Elliot Ltd
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 Lake and Elliot Ltd filed Critical Lake and Elliot Ltd
Priority to GB2854450A priority Critical patent/GB708063A/en
Publication of GB708063A publication Critical patent/GB708063A/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50Component parts or details of props
    • E21D15/52Extensible units located above or below standard props
    • E21D15/523Extensible units located above or below standard props with hydraulic or pneumatic control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Pens And Brushes (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

708,063. Hydraulic jacks. LAKE & ELLIOT, Ltd., GILBERT, G., and NEWMAN, J. Nov. 20, 1951 [Nov. 22, 1950], No. 28544/50. Class 78 (3) [Also in Group X] An hydraulic unit for a pit-prop comprises a socket 4 in which is slidatble a pad 8 seating on top of the pit-prop 1, and a ram 6 engaging the pad, against which it is adapted to be forced when the pressure of the fluid in the ram chamber 17 is increased by a screw plunger 25 and the head 3 is forced against the mine roof.
GB2854450A 1950-11-22 1950-11-22 Improvements in or relating to pit props and like supports Expired GB708063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2854450A GB708063A (en) 1950-11-22 1950-11-22 Improvements in or relating to pit props and like supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2854450A GB708063A (en) 1950-11-22 1950-11-22 Improvements in or relating to pit props and like supports

Publications (1)

Publication Number Publication Date
GB708063A true GB708063A (en) 1954-04-28

Family

ID=10277302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2854450A Expired GB708063A (en) 1950-11-22 1950-11-22 Improvements in or relating to pit props and like supports

Country Status (1)

Country Link
GB (1) GB708063A (en)

Similar Documents

Publication Publication Date Title
ES320363A1 (en) A device operated by fluid pressure. (Machine-translation by Google Translate, not legally binding)
GB1280899A (en) Improvements in hydraulic props
ES374955A1 (en) Method and apparatus for controlling the expansion and retraction of a telescopic cylinder assembly
GB876396A (en) Improvements relating to hydraulic pit-props or the like
GB708063A (en) Improvements in or relating to pit props and like supports
ES414342A1 (en) Fluid ram provided with means for braking the ram piston at the end of its stroke
GB1228381A (en)
GB720383A (en) Improvements in or relating to hydraulic pit props, chocks and like hydraulic miningappliances, hydraulic jacks and the like
GB794064A (en) Improvements in or relating to hydraulic pit props
GB701449A (en) Improvements in or relating to pit props and like supports
GB894292A (en) Improvements in or relating to hydraulic props, particularly pit props
GB956482A (en) A hydraulic pit prop
GB846783A (en) Improvements in or relating to mine supports
GB790845A (en) Improvements in and relating to hydraulic props, chocks or the like
GB836665A (en) Improvements in or relating to hydraulic pit props
GB890644A (en) Improvements in or relating to hydraulic jacks, pit props or the like
GB706982A (en) Improvements in or relating to hydraulic props and jacks, especially pit props
GB982064A (en) Vehicle jack
GB699302A (en) Improvements in or relating to pit props and like supports
GB980581A (en) Improvements in hydraulic roof supports or chocks for mines
GB1233188A (en)
GB719390A (en) Improvements in or relating to hydraulic presses
GB954660A (en) Hydraulic pit prop
GB719170A (en) Improvements in or relating to propping-up devices for mines
GB737045A (en) Improvements in or relating to manually-operated hydraulic jacks