GB1079684A - Improvements in or relating to hydraulic pit props - Google Patents

Improvements in or relating to hydraulic pit props

Info

Publication number
GB1079684A
GB1079684A GB993963A GB993963A GB1079684A GB 1079684 A GB1079684 A GB 1079684A GB 993963 A GB993963 A GB 993963A GB 993963 A GB993963 A GB 993963A GB 1079684 A GB1079684 A GB 1079684A
Authority
GB
United Kingdom
Prior art keywords
relating
pin
hydraulic pit
actuator
pit props
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
GB993963A
Inventor
Thomas Gray
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.)
Dobson Ltd W E & F
WE&F Dobson Ltd
Original Assignee
Dobson Ltd W E & F
WE&F Dobson 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 Dobson Ltd W E & F, WE&F Dobson Ltd filed Critical Dobson Ltd W E & F
Priority to GB993963A priority Critical patent/GB1079684A/en
Publication of GB1079684A publication Critical patent/GB1079684A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important

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)
  • Reciprocating Pumps (AREA)

Abstract

1,079,684. Fluid-pressure actuator for pumps. W. E. & F. DOBSON Ltd. March 11, 1964 [March 13, 1963], No. 9939/63. Heading F1A. The cylinder 2 and ram 2a of a pneumatic actuator are pivotally connected by links 5, 6 and 10, 11 respectively to a pin 12 and the links 10, 11 have an extension 14 carrying a pin 15 which is engageable with the crank-pin 1c of an interior pump in a hydraulic pit prop 1a, 1b. The actuator is supported on the prop by a slide 16b and is controlled by a valve 17 having a handle 18.
GB993963A 1963-03-13 1963-03-13 Improvements in or relating to hydraulic pit props Expired GB1079684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB993963A GB1079684A (en) 1963-03-13 1963-03-13 Improvements in or relating to hydraulic pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB993963A GB1079684A (en) 1963-03-13 1963-03-13 Improvements in or relating to hydraulic pit props

Publications (1)

Publication Number Publication Date
GB1079684A true GB1079684A (en) 1967-08-16

Family

ID=9881569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB993963A Expired GB1079684A (en) 1963-03-13 1963-03-13 Improvements in or relating to hydraulic pit props

Country Status (1)

Country Link
GB (1) GB1079684A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3488063A (en) * 1967-03-07 1970-01-06 Carl B Risser Chicken carrier cart

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3488063A (en) * 1967-03-07 1970-01-06 Carl B Risser Chicken carrier cart

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