B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
115/10
B63H 20/10 (2006.01)
Patent
CA 1053083
ABSTRACT OF THE DISCLOSURE Disclosed herein is a marine propulsion device including a member adapted to be attached to a boat hull, a propulsion assembly pivotally connected to the member for vertical swinging movement, a tilt hydraulic cylinder-piston assembly connected between the member and the propulsion assembly and including a tilt cylinder having opposed first and second ends, a trim hydraulic cylinder-piston assembly including a trim cylinder fixed on the member, having opposed first and second ends, and having therein a reciprocably movable trim piston having a piston rod extending through the second end of the trim cylinder and adapted for releasable engagement with the propulsion assembly, a pressure fluid supply pump communicating with a control valve, a first conduit communicating between the first end of the tilt cylinder and the control valve and including a first valve preventing fluid flow from the control valve to the first end of the tilt cylinder and releasably preventing fluid flow from the first end of the tilt cylinder to the control valve, a second conduit communicating between the first end of the tilt cylinder and the control valve and including a second valve preventing flow from the first end of the tilt cylinder to the control valve and releasably preventing fluid flow from the control valve to the first end of the tilt cylinder, and a third conduit communicating between the first end of the trim cylinder and the control valve, together with a let-down assembly including a third conduit communicating between the first and second ends of the tilt cylinder and including a valve arrangement operative for temporarily affording fluid flow from the first end of the tilt cylinder to the second end of the tilt cylinder in response to the generation of relatively high pressure adjacent the second end of the tilt cylinder occurring incident to the striking of an underwater obstacle.
245979
Na
Outboard Marine Corporation
LandOfFree
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