F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
115/10
F02B 61/04 (2006.01)
Patent
CA 1214690
-38- ABSTRACT OF DISCLOSURE Disclosed herein is a marine propulsion device comprising a first pivot connecting a stern bracket to a transom bracket for pivotal movement therebetween about a first pivot axis which is horizontal when the transom bracket is boat mounted, a second pivot connecting the swivel bracket to the stern bracket for pivotal movement of the swivel bracket with the stern bracket and relative to the stern bracket about a second pivot axis parallel to the first pivot axis, a propulsion unit including, at the lower end thereof, a rotatably mounted propeller and connected to the swivel bracket for steering movement therebetween and for common pivotal movement, a trim cylinder-piston assembly pivotally connected to the stern bracket and to the swivel bracket and including first and second ends, a tilt cylinder-piston assembly pivotally connected to the transom bracket means and to the stern bracket and including first and second ends, a reversible pump including first and second ports, a first conduit including a first check valve communicating between the first pump port and the first end of the trim cylinder-piston assembly, a second conduit including a second check valve communicating between the first pump port and the first end of the tilt cylinder-piston assembly, a third conduit including a third check valve dividing the third conduit into an upstream portion communicating with the second pump port and a downstream portion communicating with the second end of the trim cylinder-piston assembly, a fourth conduit including a fourth check -39- valve dividing the fourth conduit means into an upstream portion communicating with the second pump port and a downstream portion communication with the second end of the tilt cylinder-piston assembly, and a let-down arrangement communicating between the sump and the downstream portion of one of the third and fourth conduits and including a let-down valve preventing flow from the sump to the downstream portion of the one of the third and fourth conduits and selectively permitting flow from the downstream portion of the one of the third and fourth conduits to the sump, a piston engagable with and operable to selectively open the let-down valve, and a duct communicating between the piston and the second conduit and including therein a check valve preventing flow to the second conduit and permitting flow from the second conduit to the piston in response to a pressure in the second conduit above a predetermined level.
430288
Hall Charles B.
Mcbride Edward D.
Young Robert F.
Outboard Marine Corporation
Smart & Biggar
LandOfFree
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