GB642502A - Cutters or shears for use with a lever and rack pit prop puller - Google Patents

Cutters or shears for use with a lever and rack pit prop puller

Info

Publication number
GB642502A
GB642502A GB2246348A GB2246348A GB642502A GB 642502 A GB642502 A GB 642502A GB 2246348 A GB2246348 A GB 2246348A GB 2246348 A GB2246348 A GB 2246348A GB 642502 A GB642502 A GB 642502A
Authority
GB
United Kingdom
Prior art keywords
puller
shears
cutters
lever
prop
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
GB2246348A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2246348A priority Critical patent/GB642502A/en
Publication of GB642502A publication Critical patent/GB642502A/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)
  • Shovels (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

642,502. Pit prop-removing appliances. MILES S. T. Aug. 26, 1948, No. 22463. [Class 78 (iii)] [Also in Group XXIII] A device for facilitating removal of pit props with a Sylvester jack comprises a pair of cutting blades 1 pivoted to one another at 3 and connected to the jack by linked chains 4, 5 and 8, the arrangement being such that the blades cut into the prop and break it.
GB2246348A 1948-08-26 1948-08-26 Cutters or shears for use with a lever and rack pit prop puller Expired GB642502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2246348A GB642502A (en) 1948-08-26 1948-08-26 Cutters or shears for use with a lever and rack pit prop puller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2246348A GB642502A (en) 1948-08-26 1948-08-26 Cutters or shears for use with a lever and rack pit prop puller

Publications (1)

Publication Number Publication Date
GB642502A true GB642502A (en) 1950-09-06

Family

ID=10179770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2246348A Expired GB642502A (en) 1948-08-26 1948-08-26 Cutters or shears for use with a lever and rack pit prop puller

Country Status (1)

Country Link
GB (1) GB642502A (en)

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