JPS55159364A - Rod packing device in hydraulic cylinder - Google Patents
Rod packing device in hydraulic cylinderInfo
- Publication number
- JPS55159364A JPS55159364A JP6428879A JP6428879A JPS55159364A JP S55159364 A JPS55159364 A JP S55159364A JP 6428879 A JP6428879 A JP 6428879A JP 6428879 A JP6428879 A JP 6428879A JP S55159364 A JPS55159364 A JP S55159364A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- pressure
- hydraulic chamber
- decreased
- hydraulic
- 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
Abstract
PURPOSE: To extend a life of U-ring by a method wherein an inner circumferential surface of the bearing is provided with between a main seal and a sub-seal an accumulator and a drain hole communicating with a hydraulic chamber through a check valve.
CONSTITUTION: When a high pressure is acted upon the hydraulic chamber 17, a part of the hydraulic pressure oil is apt to leak out via a sliding clearance between the piston rod and the bearing. A transmission of the hydraulic oil is intercepted by the first step buffer bearing 20a, decreased at its pressure by the second buffer ring 20b, resulting in that a high pressure may not be applied to the main seal 14. The surge pressure in the hydraulic chamber 17 is sucked and slackened by the shrinking and deformation of accumulator 21 and decreased step by step, then a pressure load upon the U-ring 13 is decreased to elongate a life of the device. The oil leaked between the bearing and the piston rod is circulated back into the hydraulic chamber via check valve 24 through drain hole 25.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6428879A JPS55159364A (en) | 1979-05-24 | 1979-05-24 | Rod packing device in hydraulic cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6428879A JPS55159364A (en) | 1979-05-24 | 1979-05-24 | Rod packing device in hydraulic cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55159364A true JPS55159364A (en) | 1980-12-11 |
Family
ID=13253890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6428879A Pending JPS55159364A (en) | 1979-05-24 | 1979-05-24 | Rod packing device in hydraulic cylinder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55159364A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19523217A1 (en) * | 1995-06-27 | 1997-01-02 | Schaeffler Waelzlager Kg | Seals in a master cylinder |
-
1979
- 1979-05-24 JP JP6428879A patent/JPS55159364A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19523217A1 (en) * | 1995-06-27 | 1997-01-02 | Schaeffler Waelzlager Kg | Seals in a master cylinder |
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