Title:
HYDRAULIC OIL TANK FOR CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JP2003056502
Kind Code:
A
Abstract:
To improve space efficiency and reduce cost by abolishing the valve case of a valve device, such as a relief valve.
In a hydraulic oil tank, with return pipelines 11a, 12b connected to oil inflow ports P11a, P12b on its wall surface, valve elements VB fixed to the oil inflow ports P11a, P12b and valve means 21a, 22b are housed in a tank chamber 2B. The valve means is composed of a spring member SP for opening/closing the valve element VB, based on the pressures of the return pipelines 11a, 12b. This eliminates the need for the valve case for housing the valve elements VB and the spring members SP.
Inventors:
TAGAMI KATSUYA
AIHARA MITSUO
IGARI TAKANOBU
ISHII NOBUHIRO
AIHARA MITSUO
IGARI TAKANOBU
ISHII NOBUHIRO
Application Number:
JP2001242269A
Publication Date:
February 26, 2003
Filing Date:
August 09, 2001
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02F9/00; F15B1/26; (IPC1-7): F15B1/26; E02F9/00
Attorney, Agent or Firm:
Fuyuki Nagai