Abstract: A utility vehicle, cab ventilation system which includes a fan and a main filter located in the cab roof section with an upstream pre-filter mounted on the exterior of the cab roof. The pre-filter rotates about an axis parallel to air flow and centrifugally forces matter outward, effectively reducing material build up and frequency of service to the main filter within the roof section. The pre-filter can be built into a new cab ventilation system or provided in a module, for adding to existing cab ventilation systems.

Abstract: A tractor cab suspension system has a single support unit which mounts one end of the cab from a chassis of a tractor. The single support unit acts as a noise isolator and does not allow significant vertical oscillation of the cab relative to the chassis but allows the cab to pivot relative to the chassis in pitch and roll modes. A cab support is provided at the other end of the cab which supports the cab from the chassis and damps pitching of the cab about the single support. A roll damper is also provided to damp rolling of the cab about the single support, and a control bar extends between the cab and chassis which controls transverse movement of the cab relative to the chassis.

Abstract: A utility vehicle (10) comprising a ventilation system (30) which receives air from the environment, filters the air and supplies the filtered air into a cab (18). The system comprises a fan (54) to drive air through a channel from the environment to the cab, and a main air filter arranged within a roof section (24) of the cab and downstream of a pre-filter. The pre-filter (32;72) rotates about a rotation axis which is substantially parallel to the air flow through the pre-filter so as to reduce the particulate matter which reaches the main filter. The rotation of the pre-filter (32;72) creates a centrifugal force which forces the particulate matter radially outwardly to reduce the build-up of matter on the filter, thus reducing the frequency of servicing. The pre-filter can be integrated into a cab ventilation system or provided in a module which can be added to a vehicle having a conventional ventilation system.

Abstract: A tractor cab suspension system has a single support unit (11) which mounts one end of the cab (10) from a chassis (12) of a tractor. The single support unit (11) acts as a noise isolator and does not allow significant vertical oscillation of the cab relative to the chassis but allows the cab to pivot relative to the chassis in pitch (P) and roll (R) modes. Cab support means (13) is provided at the other end of the cab which supports the cab from the chassis and damps pitching of the cab about the single support. Roll damper means (15) are also provided to damp rolling of the cab about the single support, and a control means (18) extends between the cab and chassis which controls transverse movement of the cab relative to the chassis.