JPS646503A - Operation valve unit - Google Patents

Operation valve unit

Info

Publication number
JPS646503A
JPS646503A JP15989787A JP15989787A JPS646503A JP S646503 A JPS646503 A JP S646503A JP 15989787 A JP15989787 A JP 15989787A JP 15989787 A JP15989787 A JP 15989787A JP S646503 A JPS646503 A JP S646503A
Authority
JP
Japan
Prior art keywords
valves
holes
units
valve
check units
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
JP15989787A
Other languages
Japanese (ja)
Other versions
JP2627066B2 (en
Inventor
Jun Maruyama
Isao Oki
Mitsuharu Yamashita
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP62159897A priority Critical patent/JP2627066B2/en
Publication of JPS646503A publication Critical patent/JPS646503A/en
Application granted granted Critical
Publication of JP2627066B2 publication Critical patent/JP2627066B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To make a whole operation valve unit compact in its size by arranging coaxially valves of vacuum preventing units for opening and closing communicating holes and valves of check units for checking the flow to the entrance port sides of oil holes. CONSTITUTION:The first and second communicating holes 12, 13 and the first and second valve holes 14, 15 are bored coaxially in a valve body, and valves 16 for check units are inserted into the first and second valve holes 14, 15. Vacuum preventing valves 19 for opening and closing the first and second communicating holes 12, 13 are fixed on the small diameter top portions 16a of the valves 19 for the check units. Because the valves 16 for the check units and the valves 19 for the vacuum preventing units are arranged coaxially in this manner, the distances of an entrance port 2 from exit ports 6, 7, can be shortened and the whole unit can thus be made compact in size. A double sheet is employed against the oil leakage on the sides of exist ports 6, 7 so that the oil leakage is diminished and the reliability against invasion of foreign material is improved.
JP62159897A 1987-06-29 1987-06-29 Operating valve device Expired - Lifetime JP2627066B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62159897A JP2627066B2 (en) 1987-06-29 1987-06-29 Operating valve device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62159897A JP2627066B2 (en) 1987-06-29 1987-06-29 Operating valve device

Publications (2)

Publication Number Publication Date
JPS646503A true JPS646503A (en) 1989-01-11
JP2627066B2 JP2627066B2 (en) 1997-07-02

Family

ID=15703564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62159897A Expired - Lifetime JP2627066B2 (en) 1987-06-29 1987-06-29 Operating valve device

Country Status (1)

Country Link
JP (1) JP2627066B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372060A (en) * 1992-12-22 1994-12-13 Kabushiki Kaisha Komatsu Seisakusho Hydraulic valve assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60172707A (en) * 1984-02-15 1985-09-06 Komatsu Ltd Oil pressure supply control device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60172707A (en) * 1984-02-15 1985-09-06 Komatsu Ltd Oil pressure supply control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372060A (en) * 1992-12-22 1994-12-13 Kabushiki Kaisha Komatsu Seisakusho Hydraulic valve assembly

Also Published As

Publication number Publication date
JP2627066B2 (en) 1997-07-02

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