Patent ID: 6558212
Filing Date: 2003-05-06
Classification: B63H,F02B

Abstract:
A hydraulic tilt device for a marine outboard drive comprising a cylinder, a piston slidably supported in said cylinder and defining a first chamber and a second chamber in said cylinder, a working fluid being contained in said first and second chambers, a piston rod extending from said piston through said first chamber, a passage disposed outside of said piston and joining said first and second chambers together, a switchover valve disposed in said passage for switching said passage between a communication state and a non-communication state, the working fluid being permitted to flow from said first chamber to said second chamber and from said second chamber to said first chamber in the communication state, a contained volume of gas arranged to pressurize the working fluid in said first chamber when said passage is in the non-communication state, and means for permitting flow of the working fluid from said second chamber to said first chamber when said passage is in the non-communication state and a pressure greater than a predetermined magnitude occurs in at least a portion of said second chamber.