JPS5646034A - Oil-hydraulic shovel - Google Patents
Oil-hydraulic shovelInfo
- Publication number
- JPS5646034A JPS5646034A JP12009079A JP12009079A JPS5646034A JP S5646034 A JPS5646034 A JP S5646034A JP 12009079 A JP12009079 A JP 12009079A JP 12009079 A JP12009079 A JP 12009079A JP S5646034 A JPS5646034 A JP S5646034A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- conduit
- packing
- rod
- return pipe
- 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 prevent oil leak and improve the durability of a dust seal by connecting a drain port of the dust seal of a oil-hydraulic cylinder for the oil-hydraulic shovel, provided on the side of a piston, with a side oil passage or an oil tank by means of a conduit.
CONSTITUTION: An oil-hydraulic pump 31 and a tank 32 are connected with both ports 24 and 25 of a cylinder 20 through the intermediary of a discharge pipe 33 and a return pipe 34, while a drain port 30 is connected with the return pipe 34 through the intermediary of a conduit 39. When the oil-hydraulic pump 31 is driven, the oil pressure is sent to an operating valve 35 through the discharge pipe 33 and by the operation of the operating valve 35 a rod 23 is reciprocated. When the rod 23 makes the reciprocation, the oil on the left side of a piston 22 is discharged and is returned to the oil tank 32 through the valve 35. When there occurs any oil leak from a packing 28 during the reciprocation of the rod 23, the oil is returned from the port 30 to the return pipe 34 through the conduit 39. When there is no leakage of oil from the packing 28, the working oil is supplied between the packing 28 and a seal 29 and thereby a slidable part is lubricated.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12009079A JPS5646034A (en) | 1979-09-20 | 1979-09-20 | Oil-hydraulic shovel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12009079A JPS5646034A (en) | 1979-09-20 | 1979-09-20 | Oil-hydraulic shovel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5646034A true JPS5646034A (en) | 1981-04-27 |
Family
ID=14777653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12009079A Pending JPS5646034A (en) | 1979-09-20 | 1979-09-20 | Oil-hydraulic shovel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5646034A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59100075U (en) * | 1982-12-24 | 1984-07-06 | 永大産業株式会社 | sliding door device |
JPH057641U (en) * | 1991-07-12 | 1993-02-02 | 株式会社大塚製薬工場 | Infusion bag |
US5490574A (en) * | 1994-01-17 | 1996-02-13 | Kubota Corporation | Hood having intake openings for drawing air for a radiator and an engine |
-
1979
- 1979-09-20 JP JP12009079A patent/JPS5646034A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59100075U (en) * | 1982-12-24 | 1984-07-06 | 永大産業株式会社 | sliding door device |
JPH057641U (en) * | 1991-07-12 | 1993-02-02 | 株式会社大塚製薬工場 | Infusion bag |
US5490574A (en) * | 1994-01-17 | 1996-02-13 | Kubota Corporation | Hood having intake openings for drawing air for a radiator and an engine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3943717A (en) | Contaminant removal from a hydraulic cylinder | |
CA1147205A (en) | Tandem long stroke reciprocating mud pump assembly | |
GB1502028A (en) | Valve assembly for concrete pumps | |
JP3094032B2 (en) | Means for receiving hydraulic oil into the hydraulic system and then discharging it from the hydraulic system | |
GB1297496A (en) | ||
JPS5646034A (en) | Oil-hydraulic shovel | |
FR2292858A1 (en) | IC engine oil press control/relief valves - design combining both and permitting smaller coolers and filters | |
US4852663A (en) | Hydraulic percussive machines | |
JPS5532941A (en) | Leakage gas-free compressor | |
US2965077A (en) | Prime mover comprising two hydraulic single-cylinder piston engines | |
GB2000221A (en) | Hydraulic reciprocating pump | |
JPS5572638A (en) | Working gas supply device for gas engine | |
JPS58104347A (en) | Seal rod for stirling cycle engine | |
GB766305A (en) | Improvements relating to piston and cylinder mechanisms | |
JPS5652324A (en) | Equipment for conveying fluid under pressure | |
SU922382A1 (en) | Device for sealing by viscous liquid | |
JPS6314044Y2 (en) | ||
JPH0522295Y2 (en) | ||
SU591624A1 (en) | Pump unit | |
JPS62132001A (en) | High pressure generator | |
RU1828967C (en) | Sealing device for hydraulic cylinder rod | |
JPS5572669A (en) | Reciprocating pump | |
SU1236155A1 (en) | Distritubor for piston machine | |
EP0785845B1 (en) | Valve arrangement in a hydraulic percussive rock drill | |
JPS5728883A (en) | Control circuit for reciprocating pump of variable pressure and capacity |