JPH01118172U - - Google Patents
Info
- Publication number
- JPH01118172U JPH01118172U JP1343788U JP1343788U JPH01118172U JP H01118172 U JPH01118172 U JP H01118172U JP 1343788 U JP1343788 U JP 1343788U JP 1343788 U JP1343788 U JP 1343788U JP H01118172 U JPH01118172 U JP H01118172U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- piston ring
- electric motor
- vacuum pump
- cylinder chamber
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims 1
Landscapes
- Compressor (AREA)
Description
第１図は本考案の一実施例における電動機駆動
式真空ポンプの構成部品であるピストンリングを
示す平面図、第２図は第１図に示されたピストン
リングの正面図、第３図は従来の電動機駆動式真
空ポンプを示す断面図、第４図は従来のピストン
リングを示す第２図と同様な正面図である。
１…直流電動機、７…ピストン、８…シリンダ
、８ａ…シリンダ室、２０…ピストンリング、２
１…切欠部。なお、各図中同一符号は同一部分又
は相当する部分を示す。
Fig. 1 is a plan view showing a piston ring which is a component of an electric motor-driven vacuum pump according to an embodiment of the present invention, Fig. 2 is a front view of the piston ring shown in Fig. 1, and Fig. 3 is a conventional FIG. 4 is a front view similar to FIG. 2 showing a conventional piston ring. DESCRIPTION OF SYMBOLS 1... DC motor, 7... Piston, 8... Cylinder, 8a... Cylinder chamber, 20... Piston ring, 2
1...Notch. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
プにおいて、ピストン周壁にはめられたピストン
リングを備え、該ピストンリングにシリンダ室と
大気とを連通させるスリツトを形成したことを特
徴とする電動機駆動式真空ポンプ。 What is claimed is: 1. A piston-type vacuum pump driven by an electric motor, characterized in that the piston ring is fitted into a peripheral wall of the piston, and a slit is formed in the piston ring to communicate the cylinder chamber with the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343788U JPH01118172U (en) | 1988-02-02 | 1988-02-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343788U JPH01118172U (en) | 1988-02-02 | 1988-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01118172U true JPH01118172U (en) | 1989-08-09 |
Family
ID=31223744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1343788U Pending JPH01118172U (en) | 1988-02-02 | 1988-02-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01118172U (en) |
-
1988
- 1988-02-02 JP JP1343788U patent/JPH01118172U/ja active Pending