JPS54160977A - Functioning speed changing method by means of operating lever - Google Patents

Functioning speed changing method by means of operating lever

Info

Publication number
JPS54160977A
JPS54160977A JP6962478A JP6962478A JPS54160977A JP S54160977 A JPS54160977 A JP S54160977A JP 6962478 A JP6962478 A JP 6962478A JP 6962478 A JP6962478 A JP 6962478A JP S54160977 A JPS54160977 A JP S54160977A
Authority
JP
Japan
Prior art keywords
servo
speed
valves
valve
operating circuit
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
JP6962478A
Other languages
Japanese (ja)
Inventor
Shigeru Nakaji
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP6962478A priority Critical patent/JPS54160977A/en
Publication of JPS54160977A publication Critical patent/JPS54160977A/en
Pending legal-status Critical Current

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  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To change speed over wide ranges, by increasing speed by means of magnet valves in addition to the maximum speed of servo-valves by connecting a magnet valve operating circuit in parallel with a servo-valve operating circuit.
CONSTITUTION: In an operating circuit A of an operating lever 1, a magnet valve operating circuit 3 using magnet valves 3a, 3b is connected in parallel with a servo- valve operating circuit 2 employing servo-valves 2a, 2b. The magnet valve 3a or 3b is opened under a condition that the servo-valve 2a or 2b is maximally opened, and speed is increased by means of the magnet valve 3a or 3b in addition to the maximum speed by means of the servo-valve 2a or 2b. Consequently, speed can be changed over wide ranges without losing the operational ability of the servo-valves. Thus, devices to be operated are rapidly moved up to working locations, the devices can slowly be operated within the ranges of speed that the servo-valbes permit at the working locations and the efficiency of operations can be improved.
COPYRIGHT: (C)1979,JPO&Japio
JP6962478A 1978-06-09 1978-06-09 Functioning speed changing method by means of operating lever Pending JPS54160977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6962478A JPS54160977A (en) 1978-06-09 1978-06-09 Functioning speed changing method by means of operating lever

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6962478A JPS54160977A (en) 1978-06-09 1978-06-09 Functioning speed changing method by means of operating lever

Publications (1)

Publication Number Publication Date
JPS54160977A true JPS54160977A (en) 1979-12-20

Family

ID=13408199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6962478A Pending JPS54160977A (en) 1978-06-09 1978-06-09 Functioning speed changing method by means of operating lever

Country Status (1)

Country Link
JP (1) JPS54160977A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58146000U (en) * 1982-03-29 1983-10-01 森田ポンプ株式会社 Ladder hoisting operation device for ladder vehicles with hydraulic ladder hoisting device
JPS61116101A (en) * 1984-11-11 1986-06-03 Iseki & Co Ltd Hydraulic device for front loader and the like
WO2000031039A1 (en) * 1998-11-25 2000-06-02 Merck Patent Gmbh Substituted benzo[de]isoquinoline-1,3-diones

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58146000U (en) * 1982-03-29 1983-10-01 森田ポンプ株式会社 Ladder hoisting operation device for ladder vehicles with hydraulic ladder hoisting device
JPS6326552Y2 (en) * 1982-03-29 1988-07-19
JPS61116101A (en) * 1984-11-11 1986-06-03 Iseki & Co Ltd Hydraulic device for front loader and the like
WO2000031039A1 (en) * 1998-11-25 2000-06-02 Merck Patent Gmbh Substituted benzo[de]isoquinoline-1,3-diones

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