JPS5573790A - Method of preventing strange noise from cylinder in hydraulic machine - Google Patents
Method of preventing strange noise from cylinder in hydraulic machineInfo
- Publication number
- JPS5573790A JPS5573790A JP14768278A JP14768278A JPS5573790A JP S5573790 A JPS5573790 A JP S5573790A JP 14768278 A JP14768278 A JP 14768278A JP 14768278 A JP14768278 A JP 14768278A JP S5573790 A JPS5573790 A JP S5573790A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- sulfonate
- alkaline earth
- hydraulic machine
- strange noise
- 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
- Lubricants (AREA)
Abstract
PURPOSE: A specified amount of alkaline earth sulfonate is added to the base oil of lubricant to prevent strange noise of cylinder without any adverse effect on the characteristics as the hydraulic oil.
CONSTITUTION: An alkaline earth sulfonate is added to the base oil of lubricant in an amount of 0.01W2, preferably 0.02W0.05wt%. The sulfonate is, e.g., that of Ca, Mg or Ba, especially the Mg salt is preferred. The sulfonate salt is obtained by the sulfonation of an alkylated aromatic hydrocarbon with fuming sulfuric acid, followed by substitution with one of these alkaline earth metals.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14768278A JPS5573790A (en) | 1978-11-29 | 1978-11-29 | Method of preventing strange noise from cylinder in hydraulic machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14768278A JPS5573790A (en) | 1978-11-29 | 1978-11-29 | Method of preventing strange noise from cylinder in hydraulic machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5573790A true JPS5573790A (en) | 1980-06-03 |
Family
ID=15435891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14768278A Pending JPS5573790A (en) | 1978-11-29 | 1978-11-29 | Method of preventing strange noise from cylinder in hydraulic machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5573790A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02286793A (en) * | 1989-04-28 | 1990-11-26 | Tonen Corp | Hydraulic oil composition |
-
1978
- 1978-11-29 JP JP14768278A patent/JPS5573790A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02286793A (en) * | 1989-04-28 | 1990-11-26 | Tonen Corp | Hydraulic oil composition |
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