JPS5646034A - Oil-hydraulic shovel - Google Patents

Oil-hydraulic shovel

Info

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
Application number
JP12009079A
Other languages
Japanese (ja)
Inventor
Shizo Kihara
Akihiro Kawaguchi
Hiroaki Shigemitsu
Keisuke Sasaki
Makoto Iga
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP12009079A priority Critical patent/JPS5646034A/en
Publication of JPS5646034A publication Critical patent/JPS5646034A/en
Pending legal-status Critical Current

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
JP12009079A 1979-09-20 1979-09-20 Oil-hydraulic shovel Pending JPS5646034A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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

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