GB737698A - Improvements relating to chocks for use in mines - Google Patents

Improvements relating to chocks for use in mines

Info

Publication number
GB737698A
GB737698A GB550553A GB550553A GB737698A GB 737698 A GB737698 A GB 737698A GB 550553 A GB550553 A GB 550553A GB 550553 A GB550553 A GB 550553A GB 737698 A GB737698 A GB 737698A
Authority
GB
United Kingdom
Prior art keywords
wedge
roof
chock
raised
press
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
GB550553A
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.)
BUTTERLEY CO Ltd
PHILIP BERNARD CHRICH
Original Assignee
BUTTERLEY CO Ltd
PHILIP BERNARD CHRICH
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 BUTTERLEY CO Ltd, PHILIP BERNARD CHRICH filed Critical BUTTERLEY CO Ltd
Priority to GB550553A priority Critical patent/GB737698A/en
Publication of GB737698A publication Critical patent/GB737698A/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
    • E21D15/60—Devices for withdrawing props or chocks

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)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

737,698. Mine-chocks. BUTTERLEY CO., Ltd., and CHRICH, P. B. Feb. 26, 1954 [Feb. 27, 1953], No. 5505/53. Class 20 (2). A mine chock consists of a cap adapted to be raised by wedges and carrying portions to press against the mine roof, each capable of being released under load when a toggle device is actuated, and a further independent portion adapted to be raised by a wedge to bear against a roof beam and press it against the roof and to be held in position by a catch which can be released to lower the further independent portion and thus free the roof beam. A chock cap 1 is adapted to be raised by wedges 3, 4, co-operating with inclined surfaces 5 on the top 6 of the chock body to press hardwood pads 13 against the roof, the pads 13 being supported by flat topped members 12 having inclined lower surfaces 11 engaging inclined upper edges of upright plates 7 mounted on the cap base 2, each member 12 being held in a roof-supporting position by a toggle lever 17 and a link 19 pivotally connected between a lug 15 on the member 12 and a lug 21 on the cap base 2. By withdrawing sliding members 24 which have means to co-operate with lugs 22 on the toggle levers 17, the toggle levers are turned over their centres, and thereby the supporting members 12 are released to slide downwardly and outwardly. The slides 24 are connected by a cross-piece 28 and are held in place by a removable peg 26. With the peg 26 removed, the slides 24 can be withdrawn from a safe distance to trip the chock by means of a chain 27. In the centre of the chock a wedge 30 co-operates with inclined surfaces 6 on the top of the chock body and supports a wedge-shaped member 32 having a steeper wedge angle and upon which a support 34 for a beam 39 is slidably mounted. The beam support 34 is releasably retained in a beam-supporting position by a pivoted bar 36 which engages the upper corners of the wedge 32 and the beam is raised to press against'the roof by driving in the wedge 30. To release the beam 39 the bar 36 is knocked upwardly so that the support 34 is free to slide down the wedge 32.
GB550553A 1953-02-27 1953-02-27 Improvements relating to chocks for use in mines Expired GB737698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB550553A GB737698A (en) 1953-02-27 1953-02-27 Improvements relating to chocks for use in mines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB550553A GB737698A (en) 1953-02-27 1953-02-27 Improvements relating to chocks for use in mines

Publications (1)

Publication Number Publication Date
GB737698A true GB737698A (en) 1955-09-28

Family

ID=9797485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB550553A Expired GB737698A (en) 1953-02-27 1953-02-27 Improvements relating to chocks for use in mines

Country Status (1)

Country Link
GB (1) GB737698A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904301A (en) * 1955-10-07 1959-09-15 Mining Engineering Co Ltd Chock release
US3043549A (en) * 1959-07-17 1962-07-10 Auto Crane Company Apparatus for stabilizing equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904301A (en) * 1955-10-07 1959-09-15 Mining Engineering Co Ltd Chock release
US3043549A (en) * 1959-07-17 1962-07-10 Auto Crane Company Apparatus for stabilizing equipment

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