Patent ID: 9494171
Filing Date: 2016-11-15
CPC Classification: E02F,F15B,F16K,Y10T

Claim Text:
1. A multiple valve device comprising: a valve housing including six or more spool sliding bores, each spool sliding bore is in communication with a respective plurality of oil passages on a hydraulic source side and a respective plurality of oil passages on an actuator side; and six or more spools moveably inserted in each respective said spool sliding bore of said valve housing, each spool allowing or shutting off communication with said respective plurality of oil passages on said hydraulic source side and said respective plurality of oil passages on said actuator side, wherein said valve housing is split into two parts which are a first housing block and a second housing block abutting against each other at first and second joining surfaces of the first housing block and the second housing block, respectively, wherein said three or more spool sliding bores of said six or more spool sliding bores are disposed in said first housing block and are configured to be disposed forming a three-dimensional structure in a direction parallel with and in a direction perpendicular to said first joining surface, wherein said remaining three or more spool sliding bores of said six or more spool sliding bores are disposed in said second housing block and are configured to be disposed forming another three-dimensional structure in a direction parallel with and in a direction perpendicular to said second joining surface, wherein a relief valve for suppressing a maximum pressure in each of said oil passages to a predetermined set pressure or less is disposed in one of said first and second housing blocks, and wherein said relief valve is disposed at a position closer to said one of said first and second joining surfaces than each of said spool sliding bores disposed in said one of said first and second housing blocks.