JPH0192501U - - Google Patents

Info

Publication number
JPH0192501U
JPH0192501U JP18846387U JP18846387U JPH0192501U JP H0192501 U JPH0192501 U JP H0192501U JP 18846387 U JP18846387 U JP 18846387U JP 18846387 U JP18846387 U JP 18846387U JP H0192501 U JPH0192501 U JP H0192501U
Authority
JP
Japan
Prior art keywords
relief valve
relief
boom cylinder
valve
solenoid valve
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
JP18846387U
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 JP18846387U priority Critical patent/JPH0192501U/ja
Publication of JPH0192501U publication Critical patent/JPH0192501U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

【図面の簡単な説明】
第1図は本考案にかかるブームシリンダのリリ
ーフセツト圧切換装置の回路図、第2図は本考案
が適用される掘削機械の作業の状態を示す側面図
である。 1…ブームシリンダ、1a…ヘツド、2a,2
b…主回路、3…リリーフ弁、4…ポンプ、5…
電磁弁、6,7…管路、8…スイツチ、9…電気
信号。

Claims (1)

    【実用新案登録請求の範囲】
  1. 掘削機械のブームシリンダのヘツド側の主回路
    に、セツト圧可変のリリーフ弁を設け、このリリ
    ーフ弁にポンプからのパイロツト管路を電磁弁を
    介して連結するとともに、スイツチからの信号に
    より該電磁弁を開に切換えたとき、前記リリーフ
    弁はより高圧状態にセツトされることを特徴とす
    るブームシリンダのリリーフセツト圧切換装置。
JP18846387U 1987-12-11 1987-12-11 Pending JPH0192501U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18846387U JPH0192501U (ja) 1987-12-11 1987-12-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18846387U JPH0192501U (ja) 1987-12-11 1987-12-11

Publications (1)

Publication Number Publication Date
JPH0192501U true JPH0192501U (ja) 1989-06-16

Family

ID=31479553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18846387U Pending JPH0192501U (ja) 1987-12-11 1987-12-11

Country Status (1)

Country Link
JP (1) JPH0192501U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996006988A1 (en) * 1994-08-30 1996-03-07 Komatsu Ltd. Hydraulic circuit for boom cylinder of hydraulic shovel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996006988A1 (en) * 1994-08-30 1996-03-07 Komatsu Ltd. Hydraulic circuit for boom cylinder of hydraulic shovel
US5855159A (en) * 1994-08-30 1999-01-05 Komatsu Ltd. Hydraulic circuit for a boom cylinder in a hydraulic shovel

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