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Title:
ADDITION LIQUID SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2002322956
Kind Code:
A
Abstract:

To prevent a hydraulic fluid from being mixed with an addition liquid.

An addition liquid supply device is provided with a main body 21 in which a spool hole 29 is disposed, a spool 22 which is slidably inserted into the spool hole and divides it into a hydraulic fluid room 45 and an addition liquid room 44, a hydraulic fluid port 23 connecting to the hydraulic fluid room, an addition liquid port 24 connecting to the addition liquid room and a supply port 25 connecting thereto. In the device, a space 26 for discharging liquids leaked out of both rooms is formed in the outer periphery of spool between the spool hole and spool, and a discharge path 42 for discharging the liquid leaked in the space is also formed on the spool and is connected to a drain port 47. Further, the sealing materials 40 are disposed between the space and hydraulic fluid room and between the space and addition liquid room, respectively in between the spool and its hole.


Inventors:
TSURU NOBUYUKI
AKAMATSU SHUNSUKE
Application Number:
JP2001000127855
Publication Date:
November 08, 2002
Filing Date:
April 25, 2001
Export Citation:
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Assignee:
NABCO LTD
International Classes:
F02M37/22; F15B3/00; (IPC1-7): F02M37/22; F15B3/00
Attorney, Agent or Firm:
Hiroshi Tanaka (1 outside)



 
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