# US 11,111,805 B2 · Multi-component assembled hydrostatic seal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,805 B2 - Document ID: US11111805B2 - Status: Granted - Kind: B2 - Application number: 16/202,836 - Filed: 2018-11-28 - Published: 2020-05-28 - Granted: 2021-09-07 - Earliest claimed: 2018-11-28 - Assignees: Raytheon Technologies Corporation - Applicants: United Technologies Corporation - Inventors: Michael G. McCaffrey; Scott D. Virkler - Web page: https://patentgrep.com/patent/US11111805B2 ## CPC - B23P 15/00: Making specific metal objects by operations not covered by a single other subclass or a group in this subclass - F01D 11/025: {Seal clearance control; Floating assembly; Adaptation means to differential thermal dilatations} - B33Y 80/00: Products made by additive manufacturing - F01D 11/001: {for sealing space between stator blade and rotor} - F01D 11/16: by self-adjusting means (F01D11/12 takes precedence) - F16J 15/442: {segmented} - F16J 15/445: {with means for adjusting the clearance} - B22F 5/009: {of turbine components other than turbine blades (of turbine blades B22F5/04)} - B33Y 10/00: Processes of additive manufacturing - F02C 7/28: Arrangement of seals - F05D 2230/22: by sintering - F05D 2230/232: by welding - F05D 2230/234: Laser welding - F05D 2230/237: Brazing - F05D 2230/31: Layer deposition - F05D 2240/55: Seals - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - 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) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method of manufacturing a hydrostatic advanced low leakage seal configured to be disposed between relatively rotatable components is provided. The method includes manufacturing a plurality of separate, independent components of the seal. The method also includes assembling the plurality of separate, independent components to form the seal. ## Claims ### Claim 1 A method of manufacturing a hydrostatic advanced low leakage seal configured to be disposed between relatively rotatable components, the method comprising: manufacturing a plurality of separate, independent components of the seal, wherein the plurality of separate, independent components include a first portion and a second portion, the first portion comprising a shoe and a first beam, the second portion comprising a second beam and a base portion, the first portion and the second portion operatively coupled to each other; and assembling the plurality of separate, independent components to form the seal. ### Claim 2 (depends on 1) The method of claim 1, wherein the manufacturing the plurality of separate, independent components includes manufacturing one of the plurality of separate, independent components from a first manufacturing process that is different than a second manufacturing process used to manufacture at least one other of the plurality of separate, independent components. ### Claim 3 (depends on 2) The method of claim 2, wherein the first manufacturing process comprises a machining process and the second manufacturing process comprises an additive manufacturing process. ### Claim 4 (depends on 1) The method of claim 1, wherein the first portion and the second portion operatively coupled to each other with at least one of brazing, adhesive bonding, diffusion bonding, welding, and the like. ### Claim 5 (depends on 1) The method of claim 1, wherein the shoe is operatively coupled to the first beam at a first interface, the first beam operatively coupled to the second beam at a second interface, the first beam operatively coupled to the second beam at a third interface, and the second beam operatively coupled to the base portion at a fourth interface. ### Claim 6 (depends on 1) The method of claim 1, wherein the components are operatively coupled to each other with at least one of brazing, adhesive bonding, diffusion bonding, welding, and the like. ### Claim 7 (depends on 1) The method of claim 1, wherein the first beam and the second beam are machined from plates. ### Claim 8 (depends on 1) The method of claim 1, wherein the shoe is provided with a pocket that reduces a mass of the shoe which raises a resonant frequency of the seal. ### Claim 9 A method of manufacturing a hydrostatic advanced low leakage seal configured to be disposed between relatively rotatable components, the method comprising: manufacturing a plurality of separate, independent components, at least one of the plurality of separate, independent components formed from a machining process, and at least one other of the plurality of separate, independent components formed from an additive manufacturing process, wherein the plurality of separate, independent components include a first portion and a second portion, the first portion comprising a shoe and a first beam, the second portion comprising a second beam and a base portion, the first portion and the second portion operatively coupled to each other; and assembling the plurality of separate, independent components to form the seal. ### Claim 10 (depends on 9) The method of claim 9, wherein at least one of the plurality of separate, independent components is operatively coupled to another one of the plurality of separate, independent components with at least one of brazing, adhesive bonding, diffusion bonding, welding, and the like. ### Claim 11 (depends on 9) The method of claim 9, wherein the first beam and the second beam are each manufactured by grinding a respective plate. ### Claim 12 (depends on 9) The method of claim 9, wherein the shoe is manufactured with an additive manufacturing process. ### Claim 13 (depends on 9) The method of claim 9, wherein the base portion is manufactured with an additive manufacturing process. ### Claim 14 (depends on 9) The method of claim 9, wherein the shoe is provided with a pocket that reduces a mass of the shoe which raises a resonant frequency of the seal. ### Claim 15 A seal assembly disposed in a gas turbine engine, the seal assembly comprising: a first component; a second component, the first component and the second component being relatively rotatable components; and a first hydrostatic advanced low leakage seal disposed between the first component and the second component, the seal comprising: a base operatively coupled to one of the first component and the second component; a shoe extending circumferentially; a first beam operatively coupling the shoe to the base; and a second beam operatively coupling the shoe to the base, wherein the first beam and the second beam are independently manufactured components operatively coupled to each other with at least one of brazing, adhesive bonding, diffusion bonding, welding, and the like. ### Claim 16 (depends on 15) The seal assembly of claim 15, wherein the shoe is formed from an additive manufacturing process. ### Claim 17 (depends on 15) The seal assembly of claim 15, wherein the base is formed from an additive manufacturing process. ### Claim 18 (depends on 15) The seal assembly of claim 15, wherein the shoe and the base are components separately and independently manufactured, the shoe and base operatively coupled to the first beam and the second beam. ### Claim 19 (depends on 18) The seal assembly of claim 18, wherein the shoe and base are each operatively coupled to the first beam and the second beam with at least one of brazing, adhesive bonding, diffusion bonding, welding, and the like. ### Claim 20 (depends on 15) The seal assembly of claim 15, wherein the shoe is provided with a pocket that reduces a mass of the shoe which raises a resonant frequency of the seal.