GB363982A - Improvements in drills for rock, marble and the like - Google Patents

Improvements in drills for rock, marble and the like

Info

Publication number
GB363982A
GB363982A GB34020/31A GB3402031A GB363982A GB 363982 A GB363982 A GB 363982A GB 34020/31 A GB34020/31 A GB 34020/31A GB 3402031 A GB3402031 A GB 3402031A GB 363982 A GB363982 A GB 363982A
Authority
GB
United Kingdom
Prior art keywords
drills
grooves
point
marble
rock
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
GB34020/31A
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.)
Krupp Stahl AG
Fried Krupp AG
Original Assignee
Krupp Stahl AG
Fried Krupp AG
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 Krupp Stahl AG, Fried Krupp AG filed Critical Krupp Stahl AG
Publication of GB363982A publication Critical patent/GB363982A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)

Abstract

363,982. Drills. KRUPP AKT.-GES., F., Essen, Germany. March 13, 1931, No. 34020. Convention date, Nov. 8, 1930. Divided on 363,913. [Class 83 (iii).] A drill comprising a hard metal cutter A soldered between supporting flanges B has a triangular recess a<2> formed in the point of the cutter, the sides curving inwardly towards the point. Grooves a<1> are formed in the curved portion, a groove on the opposite side preferably corresponding in position to that portion lying between the grooves on the side shown.
GB34020/31A 1930-11-08 1931-03-13 Improvements in drills for rock, marble and the like Expired GB363982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE363982X 1930-11-08

Publications (1)

Publication Number Publication Date
GB363982A true GB363982A (en) 1931-12-31

Family

ID=6314469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34020/31A Expired GB363982A (en) 1930-11-08 1931-03-13 Improvements in drills for rock, marble and the like

Country Status (1)

Country Link
GB (1) GB363982A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673714A (en) * 1950-08-05 1954-03-30 John M Hargrave Rock or masonry drill
DE102021202559A1 (en) 2021-03-16 2022-09-22 Robert Bosch Gesellschaft mit beschränkter Haftung Cutting body and drilling tool with a cutting body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673714A (en) * 1950-08-05 1954-03-30 John M Hargrave Rock or masonry drill
DE102021202559A1 (en) 2021-03-16 2022-09-22 Robert Bosch Gesellschaft mit beschränkter Haftung Cutting body and drilling tool with a cutting body

Similar Documents

Publication Publication Date Title
GB452750A (en) Improvements relating to twist drills
GB363982A (en) Improvements in drills for rock, marble and the like
GB1368270A (en) Combined drilling and reaming tool
GB538517A (en) Joint ring
DE600676C (en) Coal and rock drill bits with two cutting edges at an unequal distance from the drill axis
GB637237A (en) Improvements in and relating to rock drills
GB457061A (en) Improvements in or relating to trowels and the like hand tools
GB355631A (en) Improvements in or relating to drills for drilling metal and the like
GB204751A (en) Improvements in or relating to dies for making or sharpening rock and coal cutting tools
GB363913A (en) Improvements in drills for rock, marble and the like
GB1327293A (en) Scissors
GB607662A (en) Improvements relating to stone cutters
GB364460A (en) Improvements in rotary drill bits
SU624729A1 (en) Cutting tool with round self-rotating bits
GB344262A (en) Improvements in or relating to circular saws and milling cutters having inserted teeth
GB426470A (en) Improvements in and relating to drills
GB369516A (en) Improvements in screw-thread caliper gauges
GB184015A (en) Improvements in or relating to dies for making or sharpening rock and coal cutting tools
GB434383A (en) Improvements relating to hammer drills
GB283366A (en) Improved hand tool for cutting sheet metal or other sheet materials
GB737246A (en) Rock drill bit with a cutting insert of hard metal
GB426941A (en) Improvements in or relating to cutters or picks and mountings therefor for use in coal cutting or similar machines
GB545155A (en) Improvements in or relating to furnace wall tubes
GB276252A (en) Improvements in means for pointing blanks for carpenters screws
GB234941A (en) Improvements in or relating to tools for milling, filing and other surfacing operations on metal and other materials