# US 8,770,269 B2 · Three phase fin surface cooler > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,269 B2 - Document ID: US8770269B2 - Status: Granted - Kind: B2 - Application number: 12/813,963 - Filed: 2010-06-11 - Published: 2011-12-15 - Granted: 2014-07-08 - Earliest claimed: 2010-06-11 - Assignees: Hs Marston Aerospace Limited - Applicants: David Russell Scott - Inventors: David Russell Scott - Web page: https://patentgrep.com/patent/US8770269B2 ## CPC - F01D 25/12: Cooling - F01M 5/002: {Cooling} - F16N 39/02: by cooling (heat-exchangers in general F28) - F28D 1/0233: {with air flow channels} - F28F 3/022: {the means being wires or pins} - F28F 2215/00: Fins - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - Y10T 29/4935: Heat exchanger or boiler making - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING - F16N: LUBRICATING - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A surface cooler is provided and includes an oil layer, through which oil flows, a separating plate disposed in heat transfer communication with the oil and fins extending into an air flow pathway and being disposed in heat transfer communication with the separating plate, the fins being arranged with varied configurations at each of two or more sections sequentially defined along a predominant direction of air flow along the air flow pathway. ## Claims ### Claim 1 A surface cooler, comprising: an oil layer, through which oil flows; a separating plate disposed in heat transfer communication with the oil; and fins extending into an air flow pathway and being disposed in heat transfer communication with the separating plate, the fins being arranged with varied configurations at each of two or more sections sequentially defined along a predominant direction of air flow along the air flow pathway, the two or more sections comprising a leading section, a rear section and an intermediate section interposed between the leading and rear sections, the fins at the leading and rear sections comprising sloped leading and trailing ends, respectively, the sloped leading and trailing ends including slopes transverse to a plane of the separating plate that begin to protrude from and terminate at the plane of the separating plate, respectively, wherein the fins at the leading section are thicker than the fins at the rear section. ### Claim 2 (depends on 1) The surface cooler according to claim 1, wherein the fins at a rearward portion of the leading section comprise a flat top surface. ### Claim 3 (depends on 1) The surface cooler according to claim 1, wherein the fins at the intermediate section are formed with a repeating pattern. ### Claim 4 (depends on 1) The surface cooler according to claim 1, wherein fins at the intermediate section have thermally efficient shapes. ### Claim 5 (depends on 1) The surface cooler according to claim 1, wherein the fins at the intermediate section have high thermal performance shapes. ### Claim 6 (depends on 1) The surface cooler according to claim 1, wherein the fins at the rear section comprise a sloped rear end. ### Claim 7 (depends on 6) The surface cooler according to claim 6, wherein the fins at a forward portion of the rear section comprise a flat top surface. ### Claim 8 A surface cooler, comprising: an oil layer, through which oil flows; a separating plate disposed in heat transfer communication with the oil; and fins extending into an air flow pathway and being disposed in heat transfer communication with the separating plate, the fins being arranged with varied configurations at each of two or more sections sequentially defined along a predominant direction of air flow along the air flow pathway, wherein the two or more sections comprise a leading section, a rear section and an intermediate section interposed between the leading and rear sections, and wherein the fins at the leading section are thicker than the fins at the rear section. ### Claim 9 (depends on 1) The surface cooler according to claim 1, wherein the fins at the leading and rear sections are substantially straight. ### Claim 10 (depends on 1) The surface cooler according to claim 1, wherein the fins are formed to define first and second transition zones between the leading and intermediate sections and between the intermediate and rear sections. ### Claim 11 (depends on 10) The surface cooler according to claim 10, wherein the fins are formed in a predefined pattern at the first and second transition zones. ### Claim 12 A surface cooler, comprising: an oil layer, through which oil flows; a separating plate disposed in heat transfer communication with the oil; and fins extending into an air flow pathway and being disposed in heat transfer communication with the separating plate, a leading section of the fins having a first thickness, being substantially straight and being arranged with a sloped leading end, a rear section of the fins having a second thickness, which is thinner than the first thickness, being substantially straight and being arranged with a sloped rear end, and an intermediate section of the fins being arranged between the leading and rear sections with a repeating pattern of high thermal performance shapes. ### Claim 13 (depends on 12) The surface cooler according to claim 12, wherein the fins at the leading section comprise a flat top surface rearward of the leading end and the fins at the rear section comprise a flat top surface forward of the rear end.