FR425459A - Improvement in helical drill bits - Google Patents

Improvement in helical drill bits

Info

Publication number
FR425459A
FR425459A FR425459A FR425459DA FR425459A FR 425459 A FR425459 A FR 425459A FR 425459 A FR425459 A FR 425459A FR 425459D A FR425459D A FR 425459DA FR 425459 A FR425459 A FR 425459A
Authority
FR
France
Prior art keywords
improvement
drill bits
helical drill
helical
bits
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
FR425459A
Other languages
French (fr)
Inventor
Morton Minot
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
Application granted granted Critical
Publication of FR425459A publication Critical patent/FR425459A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/46—Drills having a centre free from cutting edges or with recessed cutting edges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
FR425459A 1910-02-18 1911-02-01 Improvement in helical drill bits Expired FR425459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US425459XA 1910-02-18 1910-02-18

Publications (1)

Publication Number Publication Date
FR425459A true FR425459A (en) 1911-06-12

Family

ID=32365591

Family Applications (1)

Application Number Title Priority Date Filing Date
FR425459A Expired FR425459A (en) 1910-02-18 1911-02-01 Improvement in helical drill bits

Country Status (2)

Country Link
FR (1) FR425459A (en)
GB (1) GB191101850A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0798065A3 (en) * 1996-03-28 1998-03-11 Mitsubishi Materials Corporation Drill and throwaway tip

Also Published As

Publication number Publication date
GB191101850A (en) 1911-05-18

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