Tilt lock device for outboard motor

Details Tilt lock device for outboard motor Tilt lock device for outboard motor

1998-08-18

2000-09-26

Basinger, Sherman

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

440 61, B63H 5125

Patent

active

061235903

ABSTRACT:
A tilt lock device 10 comprises a piston 13 having a piston rod 14, an inner cylinder 12 defining the piston 13 into an upper oil chamber S1 and a lower oil chamber S2, and an outer cylinder 11 surrounding the inner cylinder 12. A communication passage 34 is formed in the piston 13 for bringing the upper and lower oil chambers S1 and S2 into communication with each other, and an on-off valve 15 capable of being operated from outside is disposed in the communication passage 34 for preventing oil from flowing from the lower oil passage S2 into the upper oil passage S1, and for also serving as a shock absorbing valve which allows oil to flow from the upper oil chamber S1 to the lower oil chamber S2 when a pressure in the upper oil chamber S1 exceeds a set pressure so as to absorb a shock. An accumulator chamber S3 is formed between the outer and inner cylinders 11 and 12 for also serving as a volume compensation chamber which controls the volume of the oil going in and out through the lower oil chamber S2 following in-and-out movement of the piston rod 14.

REFERENCES:
patent: 4944705 (1990-07-01), Kashima et al.
patent: 5876259 (1999-03-01), Nakamura

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