JPH0412498U - - Google Patents

Info

Publication number
JPH0412498U
JPH0412498U JP5118890U JP5118890U JPH0412498U JP H0412498 U JPH0412498 U JP H0412498U JP 5118890 U JP5118890 U JP 5118890U JP 5118890 U JP5118890 U JP 5118890U JP H0412498 U JPH0412498 U JP H0412498U
Authority
JP
Japan
Prior art keywords
spool
pressure oil
bleed
holes
open
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.)
Granted
Application number
JP5118890U
Other languages
English (en)
Other versions
JPH0712397Y2 (ja
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 JP5118890U priority Critical patent/JPH0712397Y2/ja
Publication of JPH0412498U publication Critical patent/JPH0412498U/ja
Application granted granted Critical
Publication of JPH0712397Y2 publication Critical patent/JPH0712397Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Forklifts And Lifting Vehicles (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

【図面の簡単な説明】
第１図〜第３図は本考案の実施例を示し、第１
図は中立状態の断面図、第２図はスプールを下げ
た状態の断面図、第３図はスプールを上げた状態
の断面図、第４図は従来例の断面図である。 ７は弁本体、８はスプール孔、９はスプール、
１０はポンプポート、３０，３１は第１・第２ブ
リードオフ穴、３０ａ，３１ａは一端部、３０ｂ
，３１ｂは他端部、３２，３３は第１・第２逆止
弁。

Claims (1)

  1. 【実用新案登録請求の範囲】 弁本体７のスプール孔８にスプール９を挿入し
    、そのスプール９を中立位置から圧油供給位置に
    摺動することでポンプポート１０の圧油を油圧ア
    クチユエータに供給する操作弁において、 前記スプール９の中立部９ａに第１・第２ブリ
    ードオフ穴３０，３１を、スプール９が圧油供給
    位置の時に一端部３０ａ，３１ａがドレーン側に
    開口し、他端部３０ｂ，３１ｂがポンプポート１
    ０に開口するようにそれぞれ形成し、この第１・
    第２ブリードオフ穴３０，３１に一端部３０ａ，
    ３１ａから他端部３０ｂ，３１ｂへの圧油流れを
    阻止し、かつ他端部３０ｂ，３１ｂに高圧油が作
    用すると開放作動する第１・第２逆止弁３２，３
    ３を設けたことを特徴とする操作弁。
JP5118890U 1990-05-18 1990-05-18 操作弁 Expired - Lifetime JPH0712397Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5118890U JPH0712397Y2 (ja) 1990-05-18 1990-05-18 操作弁

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5118890U JPH0712397Y2 (ja) 1990-05-18 1990-05-18 操作弁

Publications (2)

Publication Number Publication Date
JPH0412498U true JPH0412498U (ja) 1992-01-31
JPH0712397Y2 JPH0712397Y2 (ja) 1995-03-22

Family

ID=31570397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5118890U Expired - Lifetime JPH0712397Y2 (ja) 1990-05-18 1990-05-18 操作弁

Country Status (1)

Country Link
JP (1) JPH0712397Y2 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478192U (ja) * 1977-11-14 1979-06-02
WO2022195832A1 (ja) * 2021-03-18 2022-09-22 日立建機株式会社 作業機械

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478192U (ja) * 1977-11-14 1979-06-02
WO2022195832A1 (ja) * 2021-03-18 2022-09-22 日立建機株式会社 作業機械

Also Published As

Publication number Publication date
JPH0712397Y2 (ja) 1995-03-22

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