FR2276455A1 - Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore - Google Patents

Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore

Info

Publication number
FR2276455A1
FR2276455A1 FR7422657A FR7422657A FR2276455A1 FR 2276455 A1 FR2276455 A1 FR 2276455A1 FR 7422657 A FR7422657 A FR 7422657A FR 7422657 A FR7422657 A FR 7422657A FR 2276455 A1 FR2276455 A1 FR 2276455A1
Authority
FR
France
Prior art keywords
bit
sleeve
bore
block
elongate shank
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.)
Granted
Application number
FR7422657A
Other languages
French (fr)
Other versions
FR2276455B1 (en
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.)
ELDERS GERALD
Original Assignee
ELDERS GERALD
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 ELDERS GERALD filed Critical ELDERS GERALD
Priority to FR7422657A priority Critical patent/FR2276455A1/en
Publication of FR2276455A1 publication Critical patent/FR2276455A1/en
Application granted granted Critical
Publication of FR2276455B1 publication Critical patent/FR2276455B1/fr
Granted 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
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material

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)
  • Earth Drilling (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

The bit and block assembly comprises a block movable along a mine face, the block being provided with a cylindrical bore, a sleeve rotatively mounted in the block bore, the sleeve being provided with a cylindrical bore and including an enlarged head. The point-attack bit for removing material from the mine face includes an elongate shank mounted in the sleeve bore, an enlarged bit head integral and coaxial with the shank, the bit head having a leading end and a trailing end, and a cutting tip on the leading end of the bit head penetrating the material being mined with a picking action upon travel of the bit along a mine face.
FR7422657A 1974-06-28 1974-06-28 Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore Granted FR2276455A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7422657A FR2276455A1 (en) 1974-06-28 1974-06-28 Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7422657A FR2276455A1 (en) 1974-06-28 1974-06-28 Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore

Publications (2)

Publication Number Publication Date
FR2276455A1 true FR2276455A1 (en) 1976-01-23
FR2276455B1 FR2276455B1 (en) 1978-01-13

Family

ID=9140676

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7422657A Granted FR2276455A1 (en) 1974-06-28 1974-06-28 Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore

Country Status (1)

Country Link
FR (1) FR2276455A1 (en)

Also Published As

Publication number Publication date
FR2276455B1 (en) 1978-01-13

Similar Documents

Publication Publication Date Title
US3361481A (en) Rotating cutter bit
US3498677A (en) Cutting apparatus
US2575239A (en) Reversible bit and holder therefor
ES460471A1 (en) Cutter bit assemblies
GB1441309A (en) Core breaking apparatus
GB954130A (en) Improvements in or relating to coal-cutter picks
GB1395388A (en) Cutter bit and block
GB1282707A (en) Cutting apparatus suitable for use in mining operations
GB1233953A (en)
US3110184A (en) Wood core sample cutter
FR2276455A1 (en) Rotatable sleeve for self sharpening bit - point attack bit has elongate shank mounted in sleeve bore
FR2264172A1 (en) Mining tool with separable cutting tips - has split sleeve between steel shank and hollow tip, or tip brazed on
GB961449A (en) Improvements relating to drills
GB1282210A (en) Improved notching tool for a borehole
GB1283546A (en) Method of mining material from a mine face with a rotary mining head
GB1506239A (en) Studded cutting tip for drilling rock
GB957716A (en) Mineral-mining machine
GB1216161A (en) Improvements in or relating to cutting implements
DE3661465D1 (en) Tool for undercutting bore holes
GB1167533A (en) Improvements in or relating to Cutter Drums for use with Mineral Getting Machines
GB894087A (en) A cutting tool
GB1344820A (en) Mining
GB1170954A (en) Tunnel Drilling or Boring Machine.
GB958280A (en) Improvements in a method of manufacture of a lateral, curved annular gap between thewriting ball of a ball point pen and its socket and to a tool related therewith
GB1040373A (en) Improvements in or relating to turning and boring tools with replaceable tips

Legal Events

Date Code Title Description
ST Notification of lapse