GB1217466A - Improvements in or relating to devices for the extension of pit props - Google Patents

Improvements in or relating to devices for the extension of pit props

Info

Publication number
GB1217466A
GB1217466A GB1292069A GB1292069A GB1217466A GB 1217466 A GB1217466 A GB 1217466A GB 1292069 A GB1292069 A GB 1292069A GB 1292069 A GB1292069 A GB 1292069A GB 1217466 A GB1217466 A GB 1217466A
Authority
GB
United Kingdom
Prior art keywords
relating
claw
extension
devices
hammer
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
GB1292069A
Inventor
Bruno Predl
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.)
HAMMER GUNTHER WILHELM
Original Assignee
HAMMER GUNTHER WILHELM
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
Priority claimed from DE19681608280 external-priority patent/DE1608280A1/en
Application filed by HAMMER GUNTHER WILHELM filed Critical HAMMER GUNTHER WILHELM
Publication of GB1217466A publication Critical patent/GB1217466A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/52—Extensible units located above or below standard props

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)
  • Clamps And Clips (AREA)

Abstract

1,217,466. Improvements in or relating to pet-props. G. W. HAMMER [trading as Wilhelm Hammer). 12 March, 1969 [14 March, 1968], No. 12920/69. Heading E1E. An extension piece 1 for a pit prop comprises a base plate 2, fixed retention claws 3 and at least one rotatable claw 4 mounted on a bearing bracket 6 by a pivot-pin 7. A tapered key 10 is provided to hold the claw 4 in its locking position. The claw may be mounted so as to rotate about an axis parallel to the longitudinal axis of the base and the hole through which pin 7 passes may be elongated so that the clamp may be lowered when in position.
GB1292069A 1968-03-14 1969-03-12 Improvements in or relating to devices for the extension of pit props Expired GB1217466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681608280 DE1608280A1 (en) 1968-03-14 1968-03-14 Device for the extension of pit punches

Publications (1)

Publication Number Publication Date
GB1217466A true GB1217466A (en) 1970-12-31

Family

ID=5681510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1292069A Expired GB1217466A (en) 1968-03-14 1969-03-12 Improvements in or relating to devices for the extension of pit props

Country Status (2)

Country Link
FR (1) FR2003881A1 (en)
GB (1) GB1217466A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136849A (en) * 1983-03-23 1984-09-26 Hsb Hydraulik Schlauchtechnik Method and equipment for controlling the floor of a gallery
CN110453736A (en) * 2019-08-13 2019-11-15 浙江大学台州研究院 Catenary mast excavation of foundation pit equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136849A (en) * 1983-03-23 1984-09-26 Hsb Hydraulik Schlauchtechnik Method and equipment for controlling the floor of a gallery
CN110453736A (en) * 2019-08-13 2019-11-15 浙江大学台州研究院 Catenary mast excavation of foundation pit equipment
CN110453736B (en) * 2019-08-13 2024-04-12 浙江大学台州研究院 Contact net pillar foundation pit excavation equipment

Also Published As

Publication number Publication date
FR2003881A1 (en) 1969-11-14

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