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JPS55152981A - Pilot-operated check valve - Google Patents

Pilot-operated check valve

Info

Publication number
JPS55152981A
JPS55152981A JP5812679A JP5812679A JPS55152981A JP S55152981 A JPS55152981 A JP S55152981A JP 5812679 A JP5812679 A JP 5812679A JP 5812679 A JP5812679 A JP 5812679A JP S55152981 A JPS55152981 A JP S55152981A
Authority
JP
Japan
Prior art keywords
oil
piston
passage
passages
switching 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
JP5812679A
Other languages
Japanese (ja)
Other versions
JPS6151192B2 (en
Inventor
Takashi Kanai
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP5812679A priority Critical patent/JPS55152981A/en
Publication of JPS55152981A publication Critical patent/JPS55152981A/en
Publication of JPS6151192B2 publication Critical patent/JPS6151192B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Safety Valves (AREA)
  • Details Of Valves (AREA)
  • Check Valves (AREA)

Abstract

PURPOSE: To effect both-direction oil passage switching of two oil passages with a simple constitution to substantially reduce cost by providing a stepped piston in two piston chambers in a valve device.
CONSTITUTION: A stepped piston 12 is slidably contained in a valve device 1 with two oil passages A, B and two piston chambers 2a, 2b. Pressure receiving parts SA, SB which receive pressure from two oil passages are made in the stepped piston 12, and being against them, two pressure receiving parts Sa, Sb which receive pressurized oil from two piston chambers 2a, 2b are formed. Furthermore, the piston chamber 2a is connected with an oil passage B through an oil conducting passage 15. The oil passages A, B are shut off when switching valve 18a, 18b shut off the connection between the piston chambers 2a, 2b and an oil tank 11. The oil discharged from the piston chamber 2b by the switching valve 18b to the oil tank 11 flows to the oil passage B from the oil passage A. Also, the oil discharged to the oil tank 11 from the piston chamber 2a by the switching valve 18a flows to the oil passage A from B.
COPYRIGHT: (C)1980,JPO&Japio
JP5812679A 1979-05-14 1979-05-14 Pilot-operated check valve Granted JPS55152981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5812679A JPS55152981A (en) 1979-05-14 1979-05-14 Pilot-operated check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5812679A JPS55152981A (en) 1979-05-14 1979-05-14 Pilot-operated check valve

Publications (2)

Publication Number Publication Date
JPS55152981A true JPS55152981A (en) 1980-11-28
JPS6151192B2 JPS6151192B2 (en) 1986-11-07

Family

ID=13075279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5812679A Granted JPS55152981A (en) 1979-05-14 1979-05-14 Pilot-operated check valve

Country Status (1)

Country Link
JP (1) JPS55152981A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017505411A (en) * 2014-01-28 2017-02-16 ボーグワーナー インコーポレーテッド Orifice flow valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS641693U (en) * 1987-06-23 1989-01-06

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS444554Y1 (en) * 1964-11-09 1969-02-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS444554Y1 (en) * 1964-11-09 1969-02-19

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017505411A (en) * 2014-01-28 2017-02-16 ボーグワーナー インコーポレーテッド Orifice flow valve
US10428913B2 (en) 2014-01-28 2019-10-01 Borgwarner Inc. Orifice flow valve

Also Published As

Publication number Publication date
JPS6151192B2 (en) 1986-11-07

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