Patent ID: 6123590
Filing Date: 2000-09-26
Classification: B63H

Abstract:
A tilt lock device for an outboard motor in which an outboard motor is mounted to a boat stem, and which can be stopped at an arbitrary position when the motor is swung from its in-use position to its stand-by position, a tilt lock device is interposed between said stern and said motor in order to moderate a shock applied to said motor during travel and wherein said tilt lock device comprises a piston having a piston rod, an inner cylinder accommodating said piston for vertical movement and defining with said piston an upper oil chamber and a lower oil chamber, and an outer cylinder surrounding said inner cylinder, a communication passage formed in said piston for bringing said upper and lower oil chambers into communication with each other, an on-off valve capable of being operated from outside said cylinders and being disposed in said communication passage to prevent oil from flowing from said lower oil chamber into said upper oil chamber, and for also serving as a shock absorbing valve which allows oil to flow from said upper oil chamber to said lower oil chamber when pressure in said upper oil chamber exceeds a set pressure so as to absorb a shock, an accumulator chamber formed between said outer and inner cylinders for also serving as a volume compensation chamber which controls the volume of oil going in and out through said lower oil chamber in response to in-and-out movement of said piston rod.