# US 11,028,761 B1 · Serviceable cooling water strainers for straining cooling water in marine propulsion devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,761 B1 - Document ID: US11028761B1 - Status: Granted - Kind: B1 - Application number: 16/001,326 - Filed: 2018-06-06 - Granted: 2021-06-08 - Earliest claimed: 2018-06-06 - Assignees: Brunswick Corporation - Applicants: Brunswick Corporation - Inventors: Jeremy J. Kraus; Katelyn A. Vara - Web page: https://patentgrep.com/patent/US11028761B1 ## CPC - F01N 13/10: of exhaust manifolds {(with cooling jacket F01N3/046)} - B01D 29/03: self-supporting - B01D 29/035: {with curved filtering elements} - B01D 35/02: Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, (B01D35/05 takes precedence; {water pipe system filters E03B3/18, E03B7/07; dirt catchers in sewers E03F; filters or strainers for pipe-lines in general B08B, E03F; object or dirt catching devices in sinks or the like E03C1/26; suction strainers or filters for pumps F04B53/005, F04D29/70}) - B01D 35/16: Cleaning-out devices {, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid} - B01D 35/28: Strainers not provided for elsewhere - B05B 1/046: {Outlets formed, e.g. cut, in the circumference of tubular or spherical elements} - B05B 1/14: with multiple outlet openings (B05B1/02, B05B1/26 take precedence); with strainers in or outside the outlet opening - B05B 1/20: Perforated pipes or troughs, e.g. spray booms; Outlet elements therefor - B63H 21/383: {for handling cooling-water (in outboard drives B63H20/28; in machines or engines in general F01P3/00)} - F01N 3/0205: {using heat exchangers} - F01N 3/04: using liquids - F01N 13/004: {specially adapted for marine propulsion, i.e. for receiving simultaneously engine exhaust gases and engine cooling water (for submerged exhausting F01N13/12; treating exhaust by using liquids F01N3/04)} - B01D 2201/342: Axial sealings - B05B 15/40: Filters located upstream of the spraying outlets - B05B 15/65: Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits - B63H 20/28: {Arrangements, apparatus and methods for handling cooling-water in outboard drives, e.g.} cooling-water intakes {(cooling circuits for outboard marine engines F01P3/202)} - F01N 2260/024: using a liquid - F01N 2590/02: for marine vessels or naval applications - Y02T 10/12: Improving ICE efficiencies - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) - B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A marine propulsion device has an engine; an exhaust manifold for conveying exhaust gas from the engine; a cooling water jacket on the exhaust manifold, wherein a cooling water passage for conveying cooling water alongside the exhaust manifold is defined between the cooling water jacket and exhaust manifold; and a cooling water sprayer that sprays cooling water into the exhaust manifold. A manually serviceable cooling water strainer configured to strain cooling water supplied from the cooling water passage to the cooling water sprayer. The manually serviceable cooling water strainer can be manually coupled to and manually uncoupled from the marine propulsion device without use of a tool. ## Claims ### Claim 1 A marine propulsion device comprising: an engine; an elongated exhaust manifold for conveying exhaust gas from the engine; an elongated cooling water jacket on the exhaust manifold, wherein an elongated cooling water passage for conveying cooling water alongside the exhaust manifold is entirely defined radially between the cooling water jacket and the exhaust manifold; a cooling water sprayer that sprays cooling water into the exhaust manifold; and a manually serviceable cooling water strainer configured to strain cooling water supplied from the cooling water passage to the cooling water sprayer; wherein the cooling water strainer comprises a plug having a plurality of holes that separates solids from the cooling water as the cooling water flows through the cooling water strainer prior to flowing through the cooling water sprayer; and wherein the plug comprises an elongated body having a first end and an opposite, second end, wherein the plurality of holes is located at the first end, and wherein the elongated body of the plug transversely extends through the cooling jacket such that the plurality of holes faces the cooling water passage and thus receives cooling water from the cooling water passage. ### Claim 2 (depends on 1) The marine propulsion device according to claim 1, wherein the cooling water strainer is located between the cooling water passage and the cooling water sprayer and is configured so as to be manually coupled to and manually uncoupled from the exhaust manifold without use of a tool. ### Claim 3 (depends on 1) The marine propulsion device according to claim 1, wherein the first end has a concave surface and wherein the plurality of holes is formed through the concave surface. ### Claim 4 (depends on 1) The marine propulsion device according to claim 1, wherein the first end has a convex surface and wherein the plurality of holes is formed through the convex surface. ### Claim 5 (depends on 1) The marine propulsion device according to claim 1, wherein the first end has a generally flat surface and wherein the plurality of holes is formed through the flat surface. ### Claim 6 (depends on 5) The marine propulsion device according to claim 5, wherein the generally flat surface lies flush with a radially inner surface of the cooling water jacket when the plug is coupled to the exhaust manifold. ### Claim 7 (depends on 1) The marine propulsion device according to claim 1, wherein the plug further comprises an internal bore that receives cooling water from the cooling water passage via the plurality of holes and a plug outlet through which the cooling water radially flows from the internal bore to the cooling water sprayer. ### Claim 8 (depends on 7) The marine propulsion device according to claim 7, wherein the plug outlet is located axially between the first and second ends. ### Claim 9 (depends on 8) The marine propulsion device according to claim 8, wherein the second end is configured for manual grasping by a service technician for removal and replacement of the plug with respect to the exhaust manifold. ### Claim 10 (depends on 8) The marine propulsion device according to claim 8, further comprising first and second seals located on opposite sides of the plug outlet, respectively, wherein the first and second seals forms a water-tight seal with respect to the exhaust manifold when the plug is manually coupled to the exhaust manifold. ### Claim 11 (depends on 10) The marine propulsion device according to claim 10, further comprising a boss on the exhaust manifold, wherein the boss comprises an internal bore into which the plug extends when the cooling water strainer is coupled to the exhaust manifold, and wherein the first and second seals form the water-tight seal via a press-fit with the internal bore. ### Claim 12 (depends on 11) The marine propulsion device according to claim 11, wherein the boss is coupled to the exhaust manifold by a fastener. ### Claim 13 (depends on 11) The marine propulsion device according to claim 11, wherein the boss comprises a radially extending boss outlet through which cooling water from the plug outlet is conveyed to the cooling water sprayer. ### Claim 14 (depends on 13) The marine propulsion device according to claim 13, wherein the plug is manually coupled to the boss via a threaded connection that is configured so that the plug outlet automatically becomes radially aligned with the boss outlet when the plug is engaged with the boss. ### Claim 15 (depends on 11) The marine propulsion device according to claim 11, further comprising a third seal located axially between the first and second seals, and a shoulder in the internal bore of the boss, wherein the third seal sealingly engages with the shoulder when the plug is coupled to the boss. ### Claim 16 A manually serviceable cooling water strainer for straining cooling water flowing through a cooling water passage entirely defined radially between a cooling water jacket and an exhaust manifold for conveying exhaust gas from a marine propulsion device, wherein the manually serviceable cooling water strainer is configured so as to be manually coupled to and manually uncoupled from the cooling water jacket without use of a tool, the manually serviceable cooling water strainer comprising: a plug having an elongated body and plurality of holes that separates solids from the cooling water as the cooling water flows through the manually serviceable cooling water strainer, wherein the plug further comprises an internal bore that receives cooling water from the cooling water passage via the plurality of holes and a plug outlet through which the cooling water flows; wherein the plug outlet is located axially between a first and a second end and wherein the plurality of holes is located at the first end, and the second end is configured for manual grasping by a service technician for removal and replacement of the plug with respect to the exhaust manifold; a boss on the cooling water jacket of the exhaust manifold, wherein the boss comprises an internal bore into which the plug extends when the cooling water strainer is coupled to the exhaust manifold such that the elongated body of the plug extends transversely through the cooling water jacket such that the first end of the plug faces the cooling water passage and thus receives the cooling water flowing through the cooling water passage; first and second seals located on opposite sides of the outlet, respectively, wherein the first and second seals forms a water-tight seal with respect to the plug and the exhaust manifold when the plug is manually coupled to the boss, and wherein the boss comprises a radially extending boss outlet through which cooling water from the plug outlet is conveyed. ### Claim 17 (depends on 16) The manually serviceable cooling water strainer according to claim 16, wherein the plug is manually coupled to the boss via a threaded connection that is configured so that the plug outlet automatically becomes radially aligned with the plug outlet when the plug is engaged with the boss. ### Claim 18 (depends on 17) The manually serviceable cooling water strainer according to claim 17, further comprising a third seal located axially between the first and second seals, and a shoulder in the internal bore of the boss, wherein the third seal sealingly engages with the shoulder when the plug is coupled to the boss.