# US 11,440,489 B2 · Operator cab for a work vehicle with reduced noise reflection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,489 B2 - Document ID: US11440489B2 - Status: Granted - Kind: B2 - Application number: 16/722,906 - Filed: 2019-12-20 - Published: 2021-06-24 - Granted: 2022-09-13 - Earliest claimed: 2019-12-20 - Assignees: CNH Industrial America LLC - Applicants: CNH Industrial America LLC - Inventors: Bin Lou; Samrendra K. Singh; Mark D. Klassen; David S. Booth; Kaushal Ghorpade; Panos Tamamidis; Nathan J. Keller - Web page: https://patentgrep.com/patent/US11440489B2 ## CPC - B60R 13/0212: {Roof or head liners (movable head-liners B60J7/0007)} - B60R 13/0815: {Acoustic or thermal insulation of passenger compartments (wall or roof liners integrating the insulating function B60R13/02; insulating floor mats or carpets B60N3/04)} - B60R 13/0225: {self supporting head liners} - B62D 33/0617: {for tractors or off-the-road vehicles (protective devices for drivers in case of overturning of tractors B60R21/131)} - E02F 9/16: Cabins, platforms, or the like, for drivers ({for motor vehicles in general B62D33/06}, for cranes B66C13/54) - B60R 2013/0287: {integrating other functions or accessories} - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract An operator cab for a work vehicle includes: a cab enclosure including a roof an operator chair disposed in the cab enclosure; at least one layer of noise-deadening material coupled to the roof; and a headliner coupled to the roof such that the at least one layer of noise-deadening material is at least partially disposed between the headliner and the roof. The headliner includes a noise-reflective material and a noise escape region that comprises at least one opening configured to allow sound waves to pass through the noise escape region into the at least one layer of noise-deadening material and reduce noise reflection by the headliner to the operator chair. ## Claims ### Claim 1 An operator cab for a work vehicle, comprising: a cab enclosure comprising a roof; an operator chair disposed in the cab enclosure; at least one layer of noise-deadening material coupled to the roof; and a headliner coupled to the roof such that the at least one layer of noise-deadening material is at least partially disposed between the headliner and the roof, the headliner comprising a noise-reflective material, a concave region that comprises a pair of opposed curved surfaces that direct sound waves toward the operator chair, and a noise escape region disposed between the pair of opposed curved surfaces, the noise escape region comprising at least one opening configured to allow sound waves to pass through the noise escape region into the at least one layer of noise-deadening material and reduce noise reflection by the headliner to the operator chair. ### Claim 2 (depends on 1) The operator cab of claim 1, wherein the at least one opening comprises a plurality of perforations formed in the sound-reflective material. ### Claim 3 (depends on 1) The operator cab of claim 1, wherein the at least one opening is vertically aligned with the operator chair. ### Claim 4 (depends on 1) The operator cab of claim 1, wherein the at least one layer of noise-deadening material comprises a foam. ### Claim 5 (depends on 1) The operator cab of claim 1, wherein the noise-reflective material comprises a rigid polymer. ### Claim 6 (depends on 5) The operator cab of claim 5, wherein the headliner has a thickness of between 4 mm and 5 mm. ### Claim 7 (depends on 1) The operator cab of claim 1, wherein the noise escape region is oval-shaped. ### Claim 8 A work vehicle, comprising: a chassis; and an operator cab carried by the chassis, the operator cab comprising: a cab enclosure comprising a roof; an operator chair disposed in the cab enclosure; at least one layer of noise-deadening material coupled to the roof; and a headliner coupled to the roof such that the at least one layer of noise-deadening material is at least partially disposed between the headliner and the roof, the headliner comprising a noise-reflective material, a concave region comprising a pair of opposed curved surfaces that direct sound waves toward the operator chair, and a noise escape region disposed between the pair of opposed curved surfaces, the noise escape region comprising at least one opening configured to allow sound waves to pass through the noise escape region into the at least one layer of noise-deadening material and reduce noise reflection by the headliner to the operator chair. ### Claim 9 (depends on 8) The work vehicle of claim 8, wherein the at least one opening comprises a plurality of perforations formed in the sound-reflective material. ### Claim 10 (depends on 8) The work vehicle of claim 8, wherein the at least one opening is vertically aligned with the operator chair. ### Claim 11 (depends on 8) The work vehicle of claim 8, wherein the at least one layer of noise-deadening material comprises a foam. ### Claim 12 (depends on 8) The work vehicle of claim 8, wherein the noise-reflective material comprises a rigid polymer. ### Claim 13 (depends on 12) The work vehicle of claim 12, wherein the headliner has a thickness of between 4 mm and 5 mm. ### Claim 14 (depends on 8) The work vehicle of claim 8, wherein the noise escape region is oval-shaped.