JPH0160001U - - Google Patents

Info

Publication number
JPH0160001U
JPH0160001U JP1987157277U JP15727787U JPH0160001U JP H0160001 U JPH0160001 U JP H0160001U JP 1987157277 U JP1987157277 U JP 1987157277U JP 15727787 U JP15727787 U JP 15727787U JP H0160001 U JPH0160001 U JP H0160001U
Authority
JP
Japan
Prior art keywords
spools
spool
pilot
pressure
center bypass
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
JP1987157277U
Other languages
English (en)
Other versions
JPH0643523Y2 (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 JP1987157277U priority Critical patent/JPH0643523Y2/ja
Priority to US07/256,646 priority patent/US4858651A/en
Publication of JPH0160001U publication Critical patent/JPH0160001U/ja
Application granted granted Critical
Publication of JPH0643523Y2 publication Critical patent/JPH0643523Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87177—With bypass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87708—With common valve operator
    • Y10T137/87764—Having fluid actuator

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Fluid-Driven Valves (AREA)

Description

【図面の簡単な説明】
図面第１図はこの考案の実施例を示す断面図、
第２，３図は従来の制御弁を示すもので、第２図
は回路図、第３図はその概略図である。 ｂ……弁本体、１７……第１スプール、１８…
…第２スプール、２０……スプリング、２１……
第２パイロツト室、２２……第１パイロツト室、
２４……センタバイパス通路、２６……パイロツ
ト圧発生機構としてのオリフイス、２９……パラ
レル通路。

Claims (1)

    【実用新案登録請求の範囲】
  1. センタバイパス通路にオリフイス等のパイロツ
    ト圧発生機構を設け、このセンタバイパス通路に
    接続したバルブを開位置にセツトしたとき、上記
    パイロツト発生機構を通過する流体の通過圧損に
    よつてパイロツト圧を発生させ、このパイロツト
    圧の作用で可変吐出ポンプの吐出量を制御する制
    御機構を動作させる構成にした建設機械において
    、弁本体に第１スプールと第２スプールとを直列
    に配置し、それら両スプールの内端を互いに対向
    させ、上記第１スプールの外端にスプリングを作
    用させる一方、第２スプールの外端を第２パイロ
    ツト室に臨ませるとともに、上記センタリングス
    プリングのバネ力が両スプールに作用して、それ
    らがノーマル位置にあるとき、両スプールの上記
    当接面が第１パイロツト室内に位置する関係にし
    、しかも、第１パイロツト室の圧力作用で第１ス
    プールがセンタリングスプリングに抗して移動し
    たときセンタバイパス通路を閉じ、上記第２パイ
    ロツト室の圧力作用で、両スプールが移動したと
    き、センタバイパス通路を閉じるとともにパラレ
    ル通路を開放する構成にした建設機械用制御弁。
JP1987157277U 1987-10-14 1987-10-14 建設機械用制御弁 Expired - Lifetime JPH0643523Y2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1987157277U JPH0643523Y2 (ja) 1987-10-14 1987-10-14 建設機械用制御弁
US07/256,646 US4858651A (en) 1987-10-14 1988-10-12 Control valve for construction equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987157277U JPH0643523Y2 (ja) 1987-10-14 1987-10-14 建設機械用制御弁

Publications (2)

Publication Number Publication Date
JPH0160001U true JPH0160001U (ja) 1989-04-17
JPH0643523Y2 JPH0643523Y2 (ja) 1994-11-14

Family

ID=15646135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987157277U Expired - Lifetime JPH0643523Y2 (ja) 1987-10-14 1987-10-14 建設機械用制御弁

Country Status (2)

Country Link
US (1) US4858651A (ja)
JP (1) JPH0643523Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04134969U (ja) * 1991-06-06 1992-12-15 川崎重工業株式会社 制御弁

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2840671B2 (ja) * 1987-02-28 1998-12-24 株式会社島津製作所 走行車両用液圧式伝導装置
WO2015153322A1 (en) * 2014-03-31 2015-10-08 Eaton Corporation Spool assembly for control valve
JP7139297B2 (ja) * 2019-09-25 2022-09-20 日立建機株式会社 流量制御弁

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599302A (ja) * 1982-07-05 1984-01-18 Toshiba Mach Co Ltd 油圧制御装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102561C (ja) * 1900-01-01
US3788077A (en) * 1972-07-13 1974-01-29 Borg Warner Open center control of variable pumps

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599302A (ja) * 1982-07-05 1984-01-18 Toshiba Mach Co Ltd 油圧制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04134969U (ja) * 1991-06-06 1992-12-15 川崎重工業株式会社 制御弁

Also Published As

Publication number Publication date
US4858651A (en) 1989-08-22
JPH0643523Y2 (ja) 1994-11-14

Similar Documents

Publication Publication Date Title
JPH01171984U (ja)
JPH0288077U (ja)
JPH0160001U (ja)
JPS6185574U (ja)
JPH0196502U (ja)
JPS6128529Y2 (ja)
JPS6244106U (ja)
JPS62200874U (ja)
JPS634401U (ja)
JPH0323202U (ja)
JPH01133502U (ja)
JPH01166181U (ja)
JPS61160374U (ja)
JPS61103604U (ja)
JPS62200873U (ja)
JPS6175502U (ja)
JPH01169681U (ja)
JPH0394483U (ja)
JPS636281U (ja)
JPH0314384U (ja)
JPH03124084U (ja)
JPH0258101U (ja)
JPS63101302U (ja)
JPS6443205U (ja)
JPS62190173U (ja)