JPS54160977A - Functioning speed changing method by means of operating lever - Google Patents
Functioning speed changing method by means of operating leverInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1978
- 1978-06-09 JP JP6962478A patent/JPS54160977A/en active Pending
Cited By (4)
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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