US 11,027,811 B2Granted

Outboard motor lifting device

AssigneeShowa Corporation

InventorTakahiko Saito

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Abstract

An outboard motor lifting device includes a hydraulic source, a first oil channel connecting the hydraulic source with a second chamber of a tilt cylinder, a second oil channel connecting the first oil channel with a second chamber of a trim cylinder, a third oil channel connecting the hydraulic source with a first chamber of the tilt cylinder, a check valve provided between the second chamber of the tilt cylinder and a connection position between the first and second oil channels, a fourth oil channel connected to the third oil channel, and a switch valve provided on the second oil channel and connected with the fourth oil channel. The switch valve has a connection state where communication between the first oil channel and the second chamber of the trim cylinder is closed, and communication between the fourth oil channel and the second chamber of the trim cylinder is open.

Claims12

Dependent claims

An outboard motor lifting device configured to lift up and down an outboard motor, the outboard motor lifting device comprising:

one or more tilt cylinders, each including a piston that partitions the tilt cylinder into a first chamber and a second chamber, and a rod that is connected to the piston and penetrates the first chamber of the tilt cylinder;
one or more trim cylinders, each including a piston that partitions the trim cylinder into a first chamber and a second chamber, and a rod that is connected to the piston and penetrates the first chamber of the trim cylinder;
a hydraulic power source;
a first oil channel that connects the hydraulic power source with the second chamber of the one or more tilt cylinders;
a second oil channel that connects the first oil channel with the second chamber of the one or more trim cylinders;
a third oil channel that connects the hydraulic power source with the first chamber of the one or more tilt cylinders;
a check valve that is provided on the first oil channel between the second chamber of the one or more tilt cylinders and a connection position between the first oil channel and the second oil channel, and that is configured to prohibit hydraulic oil from flowing out of the second chamber of the one or more tilt cylinders;
a fourth oil channel that is connected to the third oil channel;
and
a switch valve that is provided on the second oil channel and to which the fourth oil channel is connected,
wherein a connection state of the switch valve includes:
a first connection state in which communication between the first oil channel and the second chamber of the one or more trim cylinders is in a closed state, and communication between the fourth oil channel and the second chamber of the one or more trim cylinders is in an open state.

9 more elements

An outboard motor lifting device configured to lift up and down an outboard motor, the outboard motor lifting device comprising:

one or more tilt cylinders, each including a piston that partitions the tilt cylinder into a first chamber and a second chamber, and a rod that is connected to the piston and penetrates the first chamber of the tilt cylinder;
one or more trim cylinders, each including a piston that partitions the trim cylinder into a first chamber and a second chamber, and a rod that is connected to the piston and penetrates the first chamber of the trim cylinder;
a hydraulic power source;
a first oil channel that connects the hydraulic power source with the first chamber of the one or more tilt cylinders;
a second oil channel that connects the hydraulic power source with the second chamber of the one or more tilt cylinders;
a first pump port that includes a first shuttle chamber connected to the first oil channel, and a second shuttle chamber connected to the second oil channel;
a second pump port that includes a third shuttle chamber connected to the first shuttle chamber, and a fourth shuttle chamber connected to the second shuttle chamber;
a third oil channel that connects the first oil channel with the second chamber of the one or more trim cylinders;
a fourth oil channel that connects the fourth shuttle chamber with the second chamber of the one or more trim cylinders;
a first switch valve that is provided on the third oil channel;
and
a second switch valve that is provided on the fourth oil channel.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/675,811Filed 6 Nov 2019
Priority: JP JP2019-05706025 Mar 2019
Published: US 2020/0307752 A11 Oct 2020
Granted: 8 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B63H 20/10
Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt: means enabling trim…
B63H 20/08
Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels: means enabling movement of the position of the…
B63H 20/12
Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt: means enabling steering
B63H
Marine propulsion or steering

Family

US 2020/0307752 A1Pre-grant publication · published 1 Oct 2020
US 11,027,811 B2This patent

From the US filing history. Foreign family members aren’t listed.

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