Siphon pump for a marine propulsion device
AssigneeBrunswick Corporation
InventorThomas J. Walczak
Life of this patent
Estimating the term…
Abstract
A fluid draining device for an outboard motor is provided with a conduit through which exhaust gases are directed. The flow of exhaust gas through the conduit induces a lowered pressure in a central portion of the structure. The reduced pressure magnitude in the central portion of the structure causes a pressure differential in a drain tube that is sufficient to induce a flow of water through the drain tube from a region to be drained toward the central portion. The device uses the venturi effect to create the lowered pressure. The exhaust gas flow is directly through the conduit from an idle relief exhaust passage to an exhaust port from which the exhaust exits from the marine propulsion system.
Claims17
A fluid draining device for an marine propulsion system, comprising:
- a conduit having a first end and a second end, said first end being connectable in fluid communication with an exhaust passage of an engine to direct exhaust gasses away from said engine, said conduit having a central portion connected in fluid communication between said first and second ends, said central portion having a cross sectional area that is different than said first and second ends, said central portion of said conduit being a venturi structure;
- and
- a drain tube having a first end connected in fluid communication with said central portion, a second end of said drain tube being disposed at a region of said marine propulsion system from which a liquid is to be drained said liquid being induced to flow through said drain tube in response to said exhaust gasses flowing through said venturi structure.
A fluid draining device for a marine propulsion system, comprising:
- a conduit having a first end which is connectable in fluid communication with an exhaust passage to direct exhaust gasses away from an engine of said marine propulsion system;
- a venturi structure connected in fluid communication with said first end of said conduit;
- a second end of said conduit connected in fluid communication with said venturi structure, with said venturi structure being connected in fluid communication between said first and second ends of said conduit;
- and
- a drain tube having a first end connected in fluid communication with said venturi structure, a second end of said drain tube being disposed at a region of said marine propulsion from which a liquid is to be drained, said region of said marine propulsion system to be drained is a support structure on which said engine is disposed, said liquid being induced to flow through said drain tube in response to a flow of said exhaust gasses through said venturi structure.
A fluid draining device for a marine propulsion system, comprising:
- a conduit having a first end which is connectable in fluid communication with an idle exhaust relief passage of an engine through which exhaust gasses are conducted away from said engine;
- a venturi structure connected in fluid communication with said first end of said conduit;
- a second end of said conduit connected in fluid communication with said venturi structure, with said venturi structure being connected in fluid communication between said first and second ends of said conduit;
- and
- a drain tube having a first end connected in fluid communication with said venturi structure, a second end of said drain tube being disposed at a region of said marine propulsion from which a liquid is to be drained, wherein said region of said marine propulsion system to be drained is on a support plate of said engine.
Dependencies are inferred from the claim text.