# US 2019/0313610 A1 · Coanda effect fish pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0313610 A1 - Document ID: US20190313610A1 - Status: Published application - Kind: A1 - Application number: 16/382,385 - Filed: 2019-04-12 - Published: 2019-10-17 - Earliest claimed: 2018-04-13 - Inventors: Peter B. Lindgren - Web page: https://patentgrep.com/patent/US20190313610A1 ## CPC - A01K 61/13: Prevention or treatment of fish diseases - F25D 3/08: portable, i.e. adapted to be carried personally - A01K 63/047: {Liquid pumps for aquaria (air pumps for aquaria A01K63/042)} - F04F 5/10: displacing liquids, e.g. containing solids, or liquids and elastic fluids - F04F 5/46: Arrangements of nozzles - F25D 2303/0822: Details of the element - Y02A 40/963: Off-grid food refrigeration - A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - F04F: PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {(evacuating by sorption F04B)}; SIPHONS {(conveying materials in bulk by flows of gas, liquid of foam B65G53/00)} - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract An improved Coanda effect fish pump that allows for improved pump performance with enhanced and unsymmetrical-irregularities features in circumferential flow gaps and orifice flutes that improve water flow distribution and pump performance. Design features improve fish quality during pumping and can be designed to remove sea ice from salmon. The features reduce spinning in the pump, correct for unsymmetrical input water pressure distribution, and reshape water velocities to more effectively remove sea lice. ## Claims ### Claim 1 An improved Coanda effect fish pump for transporting live fish by induced flow, said pump comprising a housing having a primary intake for primary flow, a secondary intake for induced flow, a collector chamber for intermixing said primary flow and said induced flow, and an outlet for discharge, an orifice forming a primary flow path for said primary flow circumferentially with respect to an induced flow path of said induced flow, said orifice forming a circumferential flow gap having a space between said primary intake and said collector chamber, directing said primary flow at an acute angle to an axis defined by said induced flow, said orifice including flutes defined by spaced apart surface depressions formed in said external surface of said secondary intake; the improvement comprising an unsymmetrical gap or features to adjust water flow for removal of sea lice from fish. ### Claim 2 (depends on 1) The pump according to claim 1 wherein said flutes are constructed and arranged to adjust water flow, said flutes having a width about 0.625 inches, a depth between 0.4 and 0.625 inches, and a radius of about 0.312 inches. ### Claim 3 (depends on 1) The pump according to claim 1 wherein said pump intake diameter is ten inches and at least fifteen (15) said flutes are formed around said orifice. ### Claim 4 (depends on 1) The pump according to claim 1 wherein said pump intake diameter is ten inches and said orifice has between fifteen (15) and twenty-four (24) said flutes. ### Claim 5 (depends on 1) The pump according to claim 1 wherein said flutes are not all the same width and depth. ### Claim 6 (depends on 1) The pump according to claim 1 wherein said space of said circumferential flow gap is an irregular space. ### Claim 7 (depends on 5) The pump according to claim 5 wherein said irregular space is constructed and arranged to reshape said intermixed flow to remove sea lice. ### Claim 8 (depends on 5) The pump according to claim 5 wherein said irregular space is constructed and arranged to reshape said intermixed flow to reduce fish damage. ### Claim 9 (depends on 1) The pump according to claim 1 wherein at least 40% of the primary flow passes through said flutes. ### Claim 10 (depends on 1) The pump according to claim 1 wherein at least 40% of the primary flow passes through said flutes. ### Claim 11 (depends on 1) The pump according to claim 1 wherein said flute depths are positioned about the 18, 172, 198 and 344 degree position to represent the profile of a fish wherein at least 40% of the primary flow passes through said flutes.