JPH07546Y2 - 推力緩衝用当輪 - Google Patents
推力緩衝用当輪Info
- Publication number
- JPH07546Y2 JPH07546Y2 JP1988032890U JP3289088U JPH07546Y2 JP H07546 Y2 JPH07546 Y2 JP H07546Y2 JP 1988032890 U JP1988032890 U JP 1988032890U JP 3289088 U JP3289088 U JP 3289088U JP H07546 Y2 JPH07546 Y2 JP H07546Y2
- Authority
- JP
- Japan
- Prior art keywords
- soft duct
- thrust
- steel pipe
- wheel
- duct
- 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
- 230000003139 buffering effect Effects 0.000 title claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988032890U JPH07546Y2 (ja) | 1988-03-12 | 1988-03-12 | 推力緩衝用当輪 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988032890U JPH07546Y2 (ja) | 1988-03-12 | 1988-03-12 | 推力緩衝用当輪 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01137395U JPH01137395U (enExample) | 1989-09-20 |
| JPH07546Y2 true JPH07546Y2 (ja) | 1995-01-11 |
Family
ID=31259488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988032890U Expired - Lifetime JPH07546Y2 (ja) | 1988-03-12 | 1988-03-12 | 推力緩衝用当輪 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07546Y2 (enExample) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5945077B2 (ja) * | 1977-09-01 | 1984-11-02 | 機動建設工業株式会社 | 小口径の軟質ダクトを推進埋設する方法 |
| JPS54144708A (en) * | 1978-04-30 | 1979-11-12 | Katsuma Kazunari | Crack forming preventive device in case when laying hume pipe |
| JPS6026885A (ja) * | 1983-07-25 | 1985-02-09 | 電気化学工業株式会社 | コンクリ−ト推進管用クッション材 |
-
1988
- 1988-03-12 JP JP1988032890U patent/JPH07546Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01137395U (enExample) | 1989-09-20 |
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