JPH057354Y2 - - Google Patents
Info
- Publication number
- JPH057354Y2 JPH057354Y2 JP1987194151U JP19415187U JPH057354Y2 JP H057354 Y2 JPH057354 Y2 JP H057354Y2 JP 1987194151 U JP1987194151 U JP 1987194151U JP 19415187 U JP19415187 U JP 19415187U JP H057354 Y2 JPH057354 Y2 JP H057354Y2
- Authority
- JP
- Japan
- Prior art keywords
- kelly
- lever
- keel
- cushioning material
- swivel joint
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 42
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987194151U JPH057354Y2 (fr) | 1987-12-21 | 1987-12-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987194151U JPH057354Y2 (fr) | 1987-12-21 | 1987-12-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0198294U JPH0198294U (fr) | 1989-06-30 |
| JPH057354Y2 true JPH057354Y2 (fr) | 1993-02-24 |
Family
ID=31484896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987194151U Expired - Lifetime JPH057354Y2 (fr) | 1987-12-21 | 1987-12-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH057354Y2 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735909Y2 (ja) * | 1990-12-19 | 1995-08-16 | 日本車輌製造株式会社 | アースドリルのケリーバ |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5247286Y2 (fr) * | 1975-06-14 | 1977-10-27 | ||
| JPH0426554Y2 (fr) * | 1986-02-12 | 1992-06-25 | ||
| JPH0434236Y2 (fr) * | 1986-03-20 | 1992-08-14 |
-
1987
- 1987-12-21 JP JP1987194151U patent/JPH057354Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0198294U (fr) | 1989-06-30 |
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