Abstract: The roof structure of a work vehicle cab is provided with a roof panel having a top surface exposed to the outside and a bottom surface facing the interior of the cab. A sound insulating foam liner is located under the roof panel and secured thereto by adhesives. The bottom surface of the foam liner is provided with ventilating channels. The ventilating channels have two sidewalls and a top wall extending between the sidewalls. A headliner is located below the foam liner and encloses the ventilating channels formed in the foam liner thereby forming ventilating ducts. A headliner mounting structure is also disclosed in which upstanding flanges around the perimeter of the headliner have slots that receive inward extending tabs on the frame to support the headliner.

Abstract: The operator's cab of a work vehicle is provided with a ROPS on which is mounted a roof structure. The roof structure is provided with a roof having a top surface exposed to the outside and a bottom surface facing the interior of the operator's compartment. A sound insulating foam liner having a top surface and a bottom surface is located under the roof. The top surface of the foam liner is secured to the bottom surface of the roof by adhesives. The bottom surface of the foam liner is provided with ventilating channels. The ventilating channels have two sidewalls and a top wall extending between the sidewalls. A headliner is located below the foam liner. The headliner has a top surface facing the bottom surface of the foam liner and a bottom surface facing the interior of the operator's compartment. The top surface of the headliner encloses the ventilating channels formed in the foam liner thereby forming ventilating ducts.

Abstract: The roof structure of a work vehicle cab is provided with a roof panel having a top surface exposed to the outside and a bottom surface facing the interior of the cab. A sound insulating foam liner is located under the roof panel and secured thereto by adhesives. The bottom surface of the foam liner is provided with ventilating channels. The ventilating channels have two sidewalls and a top wall extending between the sidewalls. A headliner is located below the foam liner and encloses the ventilating channels formed in the foam liner thereby forming ventilating ducts. A headliner mounting structure is also disclosed in which upstanding flanges around the perimeter of the headliner have slots that receive inward extending tabs on the frame to support the headliner.

Abstract: A protected lamp mounting assembly for an operator's cab roof of a work vehicle having a front edge, two side edges and two outwardly angled edges extending between the front edge and the exterior side edges. Two lamp housings are mounted to the side edges of the roof. The lamp housings are provided with a top plate corresponding to the roof and outwardly angled flanges corresponding to the outwardly angled edges of the roof, so that the roof and top plates and the outwardly extending edges and outwardly angled flanges provide a smooth transition between the roof and the lamp housings. The lamp housings are also provided with a mounting flange and a lamp mounting plate that extends downwardly from the top plate. The lamp housing is secured to the vehicle by the mounting flange. The lamp mounting plate in turn is provided with a lamp aperture having a specified perimeter that is smaller than the outer dimension of the lamp. The lamp is provided with a bulb portion and a rubber lamp deflector.