Patent ID: 6848353

Claim:
A hydraulic device comprising: a reservoir tank reserving a working fluid; a hydraulic pump sucking in said working fluid from said reservoir tank to increase in pressure and output said working fluid; a fluid distributor unit hydraulically connected to said hydraulic pump to be supplied with said working fluid from said hydraulic pump and having a passage block formed with a first hole inside thereof and an internal body incorporated fluid-tightly in said first hole of said passage block and formed with a groove means on an outer surface of said internal body, said fluid distributor unit being provided with a passageway means hydraulically connected to said groove means; a hydraulic module mounted on said passage block and having a first valve means that controls supply of said working fluid in said passageway means; an actuator mounted on said passage block and comprising a cylindrical shell which has a first end portion and a second end portion and is formed with a cylinder chamber inside thereof, a piston which is movable in said cylinder chamber and defines said cylinder chamber into a first and second chamber at said first and second end portion side of said piston respectively, and a piston rod connecting to said piston and disposed inside of said second chamber; a connecting member having a first and second end portion and connecting at said first end portion of said connecting member to said fluid distributor unit and at said second end portion of said connecting member to said actuator; said cylindrical shell being integrally connected at said first end portion thereof to said passage block with said second end portion of said cylindrical shell projecting outward in an axial direction of said actuator from said passage block; said connecting member being formed with a channel inside thereof to hydraulically communicate said groove means of said internal body and said second chamber of said actuator with each other; said passageway means of said passage block having a first and second passageway to hydraulically communicate said first valve means of said hydraulic module and said groove means of said internal body with each other, a third passageway to hydraulically communicate said groove means of said internal body and said first chamber of said actuator with each other, and a fourth passageway to hydraulically communicate said groove means of said internal body and said channel of said connecting member with each other.