GB861489A - Improvements in or relating to tool-holding devices for coal cutting chains - Google Patents

Improvements in or relating to tool-holding devices for coal cutting chains

Info

Publication number
GB861489A
GB861489A GB3518058A GB3518058A GB861489A GB 861489 A GB861489 A GB 861489A GB 3518058 A GB3518058 A GB 3518058A GB 3518058 A GB3518058 A GB 3518058A GB 861489 A GB861489 A GB 861489A
Authority
GB
United Kingdom
Prior art keywords
relating
tool
bit
holding devices
coal cutting
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
GB3518058A
Inventor
Sidney Ernest Proctor
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.)
Austin Hoy and Co Ltd
Original Assignee
Austin Hoy and Co 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 Austin Hoy and Co Ltd filed Critical Austin Hoy and Co Ltd
Priority to GB3518058A priority Critical patent/GB861489A/en
Publication of GB861489A publication Critical patent/GB861489A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

861,489. Mineral-mining apparatus. AUSTIN HOY & CO. Ltd. Nov. 3, 1959 [Nov. 3, 1958], No. 35180/58. Class 68(1). A double ended bit 19 has end faces 21, 22 that are so inclined to each other that when the bit is fitted into a socket in the head of and inclined to the shank 12 of a bit holder, the bit will, when the holder is secured in a pick box 13, be retained in the recess by a pin 27 extending across the recess and the abutting upper surface of the box 13.
GB3518058A 1958-11-03 1958-11-03 Improvements in or relating to tool-holding devices for coal cutting chains Expired GB861489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3518058A GB861489A (en) 1958-11-03 1958-11-03 Improvements in or relating to tool-holding devices for coal cutting chains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3518058A GB861489A (en) 1958-11-03 1958-11-03 Improvements in or relating to tool-holding devices for coal cutting chains

Publications (1)

Publication Number Publication Date
GB861489A true GB861489A (en) 1961-02-22

Family

ID=10374774

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3518058A Expired GB861489A (en) 1958-11-03 1958-11-03 Improvements in or relating to tool-holding devices for coal cutting chains

Country Status (1)

Country Link
GB (1) GB861489A (en)

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