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US 6,007,391 AGranted
Automatically adjustable trim system
AssigneeBrunswick Corporation
InventorJohn R. Eilert
Life of this patent
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AssigneeBrunswick Corporation
InventorJohn R. Eilert
Estimating the term…
An automatically adjustable trim system for a marine propulsion system provides automatic trimming of the propeller in response to increased loads on the propeller. A propulsion unit is attached to a boat transom through a tilt mechanism including a transom bracket and a swivel bracket. In a first embodiment, the transom bracket is clamped to a flexible transom which flexes in response to forces exerted on the transom during acceleration. In a second embodiment, the transom bracket is clamped to a transom bracket mounting platform that is generally parallel to and pivotally attached to the transom. A trim angle biasing mechanism is mounted between the transom and the transom bracket mounting platform for automatically adjusting the trim angle. A third embodiment includes a trim angle biasing mechanism incorporated into the transom bracket or swivel bracket. A fourth embodiment includes a spring-loaded pawl assembly between the swivel bracket and transom bracket.
In a marine propulsion system having a propulsion unit with a propeller for propelling a boat, an automatically adjustable trim system supporting the propulsion unit from the transom of the boat, comprising:
The automatically adjustable trim system as recited in claim 3 wherein the trim angle biasing mechanism comprises a connecting rod extending between the transom and the transom bracket mounting platform, the transom bracket mounting platform being movable along the connecting rod, the direction of movement of said transom bracket mounting platform being perpendicular to the transom.
The automatically adjustable trim system as recited in claim 4 comprising a compression spring mounted over the connecting rod between the transom and the transom bracket mounting platform.
The automatically adjustable trim system as recited in claim 4 wherein the connecting rod includes at least one trim angle limit stop which prevents movement of the transom bracket mounting platform outwardly beyond a maximum trim angle position.
In a marine propulsion system having a propulsion unit with a propeller for propelling a boat, an automatically adjustable trim system supporting the propulsion unit from the transom of the boat, comprising:
Dependencies are inferred from the claim text.