# US 10,371,244 B2 · Additive manufactured gear for a geared architecture gas turbine engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,244 B2 - Document ID: US10371244B2 - Status: Granted - Kind: B2 - Application number: 14/682,390 - Filed: 2015-04-09 - Published: 2016-10-13 - Granted: 2019-08-06 - Earliest claimed: 2015-04-09 - Assignees: United Technologies Corporation - Applicants: United Technologies Corporation - Inventors: Michael E McCune - Web page: https://patentgrep.com/patent/US10371244B2 ## CPC - B22F 5/085: {with helical contours} - B22F 5/009: {of turbine components other than turbine blades (of turbine blades B22F5/04)} - B22F 7/064: {using an intermediate powder layer} - B22F 7/08: with one or more parts not made from powder {(B22F7/062 takes precedence)} - F02C 7/36: Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user ({F02C3/107 - F02C3/13 and} F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H) - F16H 1/28: with gears having orbital motion - F16H 55/17: Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) - B22F 10/25: Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] - B22F 10/28: Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] - B22F 2003/247: {Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface} - F05D 2260/40311: of the epicyclical, planetary or differential type - Y02P 10/25: Process efficiency - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F16H: GEARING - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A gear includes a multiple of gear teeth that extend from an outer portion of a rim about an axis and an inner portion of the rim about the axis, the inner portion of the rim additive manufactured. ## Claims ### Claim 1 A gear, comprising: a multiple of gear teeth that extend from an outer portion of a rim about an axis; said gear teeth subtractive manufactured from the outer portion; and an inner portion of said rim about said axis, said inner portion of said rim additive manufactured to the outer portion at an interface; wherein said inner portion of said rim includes a matrix; wherein said matrix forms a lattice structure. ### Claim 2 (depends on 1) The gear as recited in claim 1, wherein said inner portion of said rim forms a journal bearing surface. ### Claim 3 (depends on 1) The gear as recited in claim 1, wherein said gear is an intermediate gear of a geared architecture for a gas turbine engine, said intermediate gear is a double helical gear. ### Claim 4 (depends on 1) The gear as recited in claim 1, wherein said inner portion provides different characteristics along an axial length. ### Claim 5 (depends on 1) The gear as recited in claim 1, wherein said interface is a bond layer that facilitates receipt of a dissimilar material that is applied to said outer portion of said rim via an additive manufacturing process. ### Claim 6 (depends on 1) The gear as recited in claim 1, wherein said interface is mechanical interlock. ### Claim 7 A geared architecture for a gas turbine engine, said geared architecture, comprising: a sun gear; a ring gear that surrounds said sun gear; and a multiple of intermediate gears in meshing engagement with said sun gear and said ring gear, each of said multiple of intermediate gears including an inner portion of a rim, said inner portion of said rim being additive manufactured, and a multiple of gear teeth that extend from an outer portion of said rim of each of said multiple of intermediate gears about an axis; said inner portion of said rim additive manufactured to the outer portion at an interface, said gear teeth manufactured via subtractive manufacturing; wherein said inner portion of said rim forms a matrix that defines a lattice structure. ### Claim 8 (depends on 7) The geared architecture as recited in claim 7, wherein said inner portion of said rim forms an inner periphery. ### Claim 9 (depends on 8) The geared architecture as recited in claim 8, wherein said interface is a mechanical interface. ### Claim 10 (depends on 8) The geared architecture as recited in claim 8, wherein said interface is a bond layer. ### Claim 11 (depends on 7) The geared architecture as recited in claim 7, wherein each of said multiple of intermediate gears is a double helical gear. ### Claim 12 (depends on 11) The geared architecture as recited in claim 11, wherein said inner portion provides different characteristics along an axial length. ### Claim 13 A method of manufacturing a gear, comprising: subtractive manufacturing a multiple of gear teeth from an outer portion of a rim; and additive manufacturing an inner portion of the rim as a matrix structure that defines a lattice structure. ### Claim 14 (depends on 13) The method as recited in claim 13, further comprising additive manufacturing the inner portion of the rim to provide different characteristics along an axial length.