GB710480A - Improvements in or relating to core bits - Google Patents

Improvements in or relating to core bits

Info

Publication number
GB710480A
GB710480A GB1871952A GB1871952A GB710480A GB 710480 A GB710480 A GB 710480A GB 1871952 A GB1871952 A GB 1871952A GB 1871952 A GB1871952 A GB 1871952A GB 710480 A GB710480 A GB 710480A
Authority
GB
United Kingdom
Prior art keywords
spring
drill
pin
slots
hollow
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
GB1871952A
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
Publication of GB710480A publication Critical patent/GB710480A/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
    • B23B51/04—Drills for trepanning
    • B23B51/0426—Drills for trepanning with centering devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Earth Drilling (AREA)

Abstract

710,480. Drills. BEISNER, K. July 24, 1952 [Aug. 2, 1951], No. 18719/52. Class 83 (3) An annular drill with a spirally-fluted head 2 has a spring-loaded centre 4 which slides within the hollow drill shaft 1 and ha; a conical pin 9 engaging between overlapping hooked ends of spring-loaded pin: 5 engaged in slots in the drill shaft to form an upper abutment for the spring 8 When the amount of hole drilled is sufficient to guide the drill, the pin 9 has moved upward enough t( withdraw the pins 5 fron their slots and release the spring. Oil may be sup plied to the hollow. shaf through a sleeve 12 and connection 11.
GB1871952A 1951-08-03 1952-07-24 Improvements in or relating to core bits Expired GB710480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB16156A DE901487C (en) 1951-08-03 1951-08-03 Core drill equipped with a centering device

Publications (1)

Publication Number Publication Date
GB710480A true GB710480A (en) 1954-06-16

Family

ID=6618846

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1871952A Expired GB710480A (en) 1951-08-03 1952-07-24 Improvements in or relating to core bits

Country Status (4)

Country Link
BE (1) BE513263A (en)
DE (1) DE901487C (en)
FR (1) FR1061227A (en)
GB (1) GB710480A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2332832A1 (en) * 1975-11-26 1977-06-24 Wozar Tiberius TOOL FOR DRILLING WITH CORE
FR2442097A1 (en) * 1978-11-22 1980-06-20 Hougen Everett SHAFT FOR ANNULAR Ream
CN104475826A (en) * 2014-11-20 2015-04-01 北京航空航天大学 Diamond sleeve grinding cutter suitable for drill sleeve guide

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357323A1 (en) * 1976-07-07 1978-02-03 Mavilor DRILLING TOOL WITH CLEAR CENTRAL PART AND EJECTOR DEVICE FOR THE METAL CORE SHAPED BY THE TOOL
US4131384A (en) * 1977-09-08 1978-12-26 Hougen Everett D Arbor for annular hole cutter
US4322188A (en) * 1980-09-02 1982-03-30 Hougen Everett D Annular hole cutter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE433307C (en) * 1925-03-17 1926-08-27 Wilhelm Goldau Metal hollow drill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2332832A1 (en) * 1975-11-26 1977-06-24 Wozar Tiberius TOOL FOR DRILLING WITH CORE
FR2442097A1 (en) * 1978-11-22 1980-06-20 Hougen Everett SHAFT FOR ANNULAR Ream
CN104475826A (en) * 2014-11-20 2015-04-01 北京航空航天大学 Diamond sleeve grinding cutter suitable for drill sleeve guide
CN104475826B (en) * 2014-11-20 2017-02-22 北京航空航天大学 Diamond sleeve grinding cutter suitable for drill sleeve guide

Also Published As

Publication number Publication date
FR1061227A (en) 1954-04-09
DE901487C (en) 1954-01-11
BE513263A (en)

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