JPH0195589U - - Google Patents

Info

Publication number
JPH0195589U
JPH0195589U JP19310887U JP19310887U JPH0195589U JP H0195589 U JPH0195589 U JP H0195589U JP 19310887 U JP19310887 U JP 19310887U JP 19310887 U JP19310887 U JP 19310887U JP H0195589 U JPH0195589 U JP H0195589U
Authority
JP
Japan
Prior art keywords
discharge port
vacuum pump
check valve
type vacuum
utility
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
Application number
JP19310887U
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP19310887U priority Critical patent/JPH0195589U/ja
Publication of JPH0195589U publication Critical patent/JPH0195589U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
第1図は本考案に係るスクリユ式真空ポンプの
断面図、第2図は第1図に示す真空ポンプにおけ
る上記距離lと圧力Pとの関係を示す図、第3図
は従来のスクリユ式真空ポンプの断面図、第4図
は第3図に示す真空ポンプにおける上記距離lと
圧力Pとの関係を示す図である。 1……逆止弁、8……吐出ポート。

Claims (1)

    【実用新案登録請求の範囲】
  1. 吐出ポートの出側に、吐出ポートに近接させて
    逆止弁を取付けたことを特徴とするスクリユ式真
    空ポンプ。
JP19310887U 1987-12-16 1987-12-16 Pending JPH0195589U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19310887U JPH0195589U (ja) 1987-12-16 1987-12-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19310887U JPH0195589U (ja) 1987-12-16 1987-12-16

Publications (1)

Publication Number Publication Date
JPH0195589U true JPH0195589U (ja) 1989-06-23

Family

ID=31483926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19310887U Pending JPH0195589U (ja) 1987-12-16 1987-12-16

Country Status (1)

Country Link
JP (1) JPH0195589U (ja)

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