JPS56492A - Rotary bit for enlarging bottom - Google Patents
Rotary bit for enlarging bottomInfo
- Publication number
- JPS56492A JPS56492A JP9983079A JP9983079A JPS56492A JP S56492 A JPS56492 A JP S56492A JP 9983079 A JP9983079 A JP 9983079A JP 9983079 A JP9983079 A JP 9983079A JP S56492 A JPS56492 A JP S56492A
- Authority
- JP
- Japan
- Prior art keywords
- rotary bit
- enlarging
- enlarging bottom
- bit
- rotary
- 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
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9983079A JPS56492A (en) | 1979-08-07 | 1979-08-07 | Rotary bit for enlarging bottom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9983079A JPS56492A (en) | 1979-08-07 | 1979-08-07 | Rotary bit for enlarging bottom |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56492A true JPS56492A (en) | 1981-01-06 |
JPS5640757B2 JPS5640757B2 (en) | 1981-09-22 |
Family
ID=14257728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9983079A Granted JPS56492A (en) | 1979-08-07 | 1979-08-07 | Rotary bit for enlarging bottom |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56492A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4539458A (en) * | 1981-11-11 | 1985-09-03 | Inoue-Japax Incorporated | Non-immersion EDM method and apparatus |
KR101077960B1 (en) * | 2010-11-18 | 2011-10-28 | (주)삼일이엔씨 | Hole enlargement drills for maintaining drilled hole shape underground, and construction method of piles and tention members using them |
-
1979
- 1979-08-07 JP JP9983079A patent/JPS56492A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4539458A (en) * | 1981-11-11 | 1985-09-03 | Inoue-Japax Incorporated | Non-immersion EDM method and apparatus |
KR101077960B1 (en) * | 2010-11-18 | 2011-10-28 | (주)삼일이엔씨 | Hole enlargement drills for maintaining drilled hole shape underground, and construction method of piles and tention members using them |
WO2012067454A3 (en) * | 2010-11-18 | 2012-07-26 | 주식회사 삼일이엔씨 | Borehole-diameter-expanding drill having the function of maintaining the shape of the reamed area in the ground, and a pile and tension member construction method for building work using the same |
Also Published As
Publication number | Publication date |
---|---|
JPS5640757B2 (en) | 1981-09-22 |
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