# US 12,767,337 B2 · Multi-piece engine mount system amenable to additive manufacture > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,767,337 B2 - Document ID: US12767337B2 - Status: Granted - Kind: B2 - Application number: 18/951,850 - Filed: 2024-11-19 - Published: 2026-05-21 - Granted: 2026-10-20 - Earliest claimed: 2024-11-19 - Assignees: Honeywell Aerospace US LLC - Applicants: Honeywell International Inc. - Inventors: Shawn Alstad - Web page: https://patentgrep.com/patent/US12767337B2 ## CPC - B64D 27/40: Arrangements for mounting power plants in aircraft - F16M 1/04: for rotary engines or similar machines - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - F16M: FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS ## Abstract A mount system for coupling an engine with a frame includes a yoke that has two limbs that couple with the engine and that has a hub from which the two limbs extend. The yoke also couples with the frame. The yoke includes separate pieces that may be formed separate from one another and that join together around the hub, with plate sections of the pieces having overlapping parts that define mating surfaces between the pieces. Apertures are defined through the plate sections and the hub to receive pins for securing the pieces together. A plural number of shear planes are defined by the overlapping parts at each of the apertures and pins. ## Claims ### Claim 1 A mount system for coupling an engine with a frame, the mount system comprising: a yoke having two limbs each configured to couple with the engine and having a hub from which the two limbs extend, the yoke configured to couple with the frame, wherein the yoke is comprised of at least two pieces that join together around the hub, with plate sections of the at least two pieces having overlapping parts that define mating surfaces between the at least two pieces, wherein apertures are defined through the at least two pieces at the plate sections, wherein the apertures are configured to receive pins for securing the at least two pieces together, and wherein a plural number of shear planes are defined by the overlapping parts at each of the apertures and the pins, wherein the plate sections have pads extending from the mating surfaces, wherein the pads are configured to define a contact slip fit between the at least two pieces of the yoke. ### Claim 2 (depends on 1) The mount system of claim 1, wherein the two limbs are coupled with the engine and the yoke includes arms coupled with the frame, wherein the frame comprises an airframe. ### Claim 3 (depends on 1) The mount system of claim 1, wherein: the at least two pieces comprise three pieces that include the two limbs and the hub, the two limbs comprise a first limb and a second limb, the overlapping parts of each of the first limb, of the second limb, and of the hub includes the pads that extend outward, providing contact at the pads between the first limb, the second limb and the hub. ### Claim 4 (depends on 1) The mount system of claim 1, wherein: the at least two pieces comprise three pieces that include the two limbs and the hub, the yoke includes at least two lap joints to secure the two limbs and the hub together as one component, the at least two lap joints are fixed by three pins extending through the yoke, and all of the three pins are placed in multiple shear conditions at the at least two lap joints. ### Claim 5 (depends on 1) The mount system of claim 1, wherein: the at least two pieces comprise three pieces that include the two limbs and the hub, the yoke includes two lap joints to secure the two limbs and the hub together as one component, the two lap joints are fixed by three pins extending through the yoke, and two of the three pins are placed in double shear and another of the three pins is placed in quadruple shear at the two lap joints. ### Claim 6 (depends on 1) The mount system of claim 1, wherein: the at least two pieces comprise three pieces that include the two limbs and the hub, the yoke includes two lap joints to secure the two limbs and the hub together as one component, the two lap joints are fixed by three pins extending through the yoke, and all of the three pins extend through each of the two limbs and through the hub. ### Claim 7 (depends on 1) The mount system of claim 1, wherein: the at least two pieces comprise three pieces that include the two limbs and the hub, the two limbs comprise a first limb and a second limb, the first limb has a first terminal end and the second limb has a second terminal end, the yoke has an overall height between the first terminal end and the second terminal end, a first pin extends through the yoke approximately at a center of the hub and is located a first distance from the first terminal end, a second pin extends through the yoke in a first extension of the hub and is located a second distance from the first terminal end, wherein the second distance is less than the first distance, a third pin extends through the yoke in a second extension of the hub and is located a third distance from the first terminal end, wherein the third distance is greater than the first distance, wherein the second distance is equal to thirty percent of the overall height, within fifteen percent of the overall height. ### Claim 8 (depends on 1) The mount system of claim 1, wherein the hub defines four openings, with the two limbs coupled with the hub at three of the four openings and the hub coupled with the engine at a fourth of the four openings. ### Claim 9 (depends on 1) The mount system of claim 1, wherein the two limbs comprise a first limb and a second limb, wherein each of the first limb and the second limb have extensions with depressions at which the first limb and the second limb mate and overlap. ### Claim 10 (depends on 1) The mount system of claim 1, wherein the two limbs each define a receiver opening in which the hub is disposed. ### Claim 11 A mount system for coupling an engine with a frame, the mount system comprising: a yoke having a first limb and a second limb, the first limb and the second limb configured to couple with the engine and having a hub from which the first and second limbs extend, the yoke configured to couple with the frame, wherein the yoke is comprised of separate pieces that include the first limb, the second limb, and the hub, wherein the first limb and the second limb join together around and with the hub, with plate sections of the first limb, the second limb, and the hub having overlapping parts that define mating surfaces between the first limb, the second limb, and the hub, wherein apertures are defined through the plate sections of each of the first limb, the second limb, and the hub, wherein the apertures are configured to receive pins for securing the first limb, the second limb, and the hub together, and wherein a plural number of shear planes are defined by the overlapping parts at each of the apertures and the pins. ### Claim 12 (depends on 11) The mount system of claim 11, wherein the plate sections have pads extending from the mating surfaces, wherein the pads are configured to define a contact slip fit between the first limb and the hub, and between the second limb and the hub, meaning the first limb, the second limb, and the hub slip together with contact at the mating surfaces between each of the first limb, the second limb, and the hub. ### Claim 13 (depends on 11) The mount system of claim 11, wherein the overlapping parts of each of the first limb, of the second limb, and of the hub include pads that extend outward, providing contact at the pads between the first limb and the hub, and between the second limb and the hub. ### Claim 14 (depends on 11) The mount system of claim 11, wherein: the yoke includes at least two lap joints to secure the first limb, the second limb and the hub together as one component, the at least two lap joints are fixed by three pins extending through the yoke, and all of the three pins are placed in multiple shear conditions by the at least two lap joints. ### Claim 15 (depends on 11) The mount system of claim 11, wherein: the yoke includes two lap joints to secure the first limb, the second limb and the hub together as one component, the two lap joints are fixed by three pins extending through the yoke, and two of the three pins are placed in double shear and one of the three pins is placed in quadruple shear by the two lap joints. ### Claim 16 (depends on 11) The mount system of claim 11, wherein: the yoke includes two lap joints to secure the first limb, the second limb and the hub together as one component, the two lap joints are fixed by three pins extending through the yoke, and all of the three pins extend through each of the two limbs and through the hub. ### Claim 17 (depends on 11) The mount system of claim 11, wherein: the first limb has a first terminal end and the second limb has a second terminal end, the yoke has an overall height between the first terminal end and the second terminal end, a first pin extends through the yoke approximately at a center of the hub and is located a first distance from the first terminal end, a second pin extends through the yoke at a first extension of the hub and is located a second distance from the first terminal end, wherein the second distance is less than the first distance, a third pin extends through the yoke at a second extension of the hub and is located a third distance from the first terminal end, wherein the third distance is greater than the first distance, wherein the second distance is equal to thirty percent of the overall height, within fifteen percent of the overall height. ### Claim 18 (depends on 11) The mount system of claim 11, wherein the hub defines four openings, with the first limb, the second limb and the hub couple together at three of the four openings, and with the hub coupled with the engine at a fourth of the four openings. ### Claim 19 (depends on 11) The mount system of claim 11, wherein each of the first limb and the second limb has extensions with depressions at which the first limb and the second limb mate and overlap, wherein the first limb and the second limb each define a receiver opening at the extensions in which the hub is disposed. ### Claim 20 A mount system for coupling an engine with an airframe, the mount system comprising: a yoke having a first limb, a second limb and a hub from which the first and second limbs extend, the first limb, the second limb and the hub each configured to couple with both the engine and with the airframe, wherein the yoke is assembled from separate pieces that include the first limb, the second limb, and the hub, wherein the first limb and the second limb join together around and with the hub, with plate sections of the first limb, the second limb, and the hub having overlapping parts that define mating surfaces between the first limb, the second limb, and the hub, wherein the plate sections have pads extending from the mating surfaces, wherein the pads are configured to define a contact slip fit between the first limb and the hub, and between the second limb and the hub wherein apertures are defined through the plate sections of each of the first limb, the second limb, and the hub, wherein the apertures are configured to receive pins for securing the first limb, the second limb, and the hub together, and wherein a plural number of shear planes are defined by the overlapping parts at each of the apertures and the pins.