JPS5751005A - Composite control valve fitted with attachment valve - Google Patents

Composite control valve fitted with attachment valve

Info

Publication number
JPS5751005A
JPS5751005A JP9304280A JP9304280A JPS5751005A JP S5751005 A JPS5751005 A JP S5751005A JP 9304280 A JP9304280 A JP 9304280A JP 9304280 A JP9304280 A JP 9304280A JP S5751005 A JPS5751005 A JP S5751005A
Authority
JP
Japan
Prior art keywords
valve
attachment
composite control
loading
control 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.)
Granted
Application number
JP9304280A
Other languages
Japanese (ja)
Other versions
JPS5948883B2 (en
Inventor
Yutaka Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co Ltd
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 by Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP9304280A priority Critical patent/JPS5948883B2/en
Publication of JPS5751005A publication Critical patent/JPS5751005A/en
Publication of JPS5948883B2 publication Critical patent/JPS5948883B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To reduce the cost by a method wherein a loading valve which controls loading and unloading is provided at the lower stream of a bypass passage of a composite control valve.
CONSTITUTION: The loading valve 51 is fitted at the lower stream of the bypass passage of the composite control valve 11. When the attachment valve 34 is in its neutral position, the loading valve 51 is opened to maintain an unloading condition. On the other hand, when the attachment valve 34 is operated, the loading valve 51 is closed by a pilot change-over valve 61 to maintain a loading condition and an actuator for an attachment is operated through the attachment valve 34. Accordingly, since the valve body of an ordinary composite control valve 11 is used in the composite control valve 11 fitted with the attachment valve 34, the cost of the composite control valve can be reduced.
COPYRIGHT: (C)1982,JPO&Japio
JP9304280A 1980-07-08 1980-07-08 Composite control valve with attachment valve added Expired JPS5948883B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9304280A JPS5948883B2 (en) 1980-07-08 1980-07-08 Composite control valve with attachment valve added

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9304280A JPS5948883B2 (en) 1980-07-08 1980-07-08 Composite control valve with attachment valve added

Publications (2)

Publication Number Publication Date
JPS5751005A true JPS5751005A (en) 1982-03-25
JPS5948883B2 JPS5948883B2 (en) 1984-11-29

Family

ID=14071440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9304280A Expired JPS5948883B2 (en) 1980-07-08 1980-07-08 Composite control valve with attachment valve added

Country Status (1)

Country Link
JP (1) JPS5948883B2 (en)

Also Published As

Publication number Publication date
JPS5948883B2 (en) 1984-11-29

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