JPH0342156Y2 - - Google Patents
Info
- Publication number
- JPH0342156Y2 JPH0342156Y2 JP4990685U JP4990685U JPH0342156Y2 JP H0342156 Y2 JPH0342156 Y2 JP H0342156Y2 JP 4990685 U JP4990685 U JP 4990685U JP 4990685 U JP4990685 U JP 4990685U JP H0342156 Y2 JPH0342156 Y2 JP H0342156Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- shaft
- outer cylinder
- inner cylinder
- cylinder
- 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
Links
- 239000013013 elastic material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 229920001971 elastomer Polymers 0.000 description 10
- 239000005060 rubber Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4990685U JPH0342156Y2 (tr) | 1985-04-05 | 1985-04-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4990685U JPH0342156Y2 (tr) | 1985-04-05 | 1985-04-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61169189U JPS61169189U (tr) | 1986-10-20 |
| JPH0342156Y2 true JPH0342156Y2 (tr) | 1991-09-04 |
Family
ID=30567525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4990685U Expired JPH0342156Y2 (tr) | 1985-04-05 | 1985-04-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0342156Y2 (tr) |
-
1985
- 1985-04-05 JP JP4990685U patent/JPH0342156Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61169189U (tr) | 1986-10-20 |
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