Patent ID: 6390867
Filing Date: 2002-05-21
Classification: B63H,F16F

Abstract:
A tilt device for a marine propulsion unit comprising:a cylinder connected to one of a hull and a main body of a propulsion unit which is arranged and constructed to receive a working fluid; a piston rod connected to another and inserted into the cylinder so as to freely compress and expand; a piston connected to an inserted end to the cylinder of the piston rod, and defining a rod side chamber in a piston rod receiving side within the cylinder and a piston side chamber in a side which does not receive a piston rod within the cylinder. a switching valve capable of communicating the rod side chamber with the piston side chamber; and a pressure accumulating chamber capable of applying a gas pressure to the piston side chamber, wherein the cylinder has a double pipe having an outer cylinder and an inner cylinder, the piston rod and the piston are received in the inner cylinder, the pressure accumulating chamber is formed in a space between the outer cylinder and the inner cylinder, and gas-liquid separating means is arranged between the pressure accumulating chamber and the piston side chamber.