초록 ▼

A chemical filter for attachment into an inlet housing of a tractor cab ventilation system includes a rectangular housing with a surrounding flange co-planar with one end face so that the flange can be clamped between an abutment face surrounding the inlet opening and a dust filter conventional on t

A chemical filter for attachment into an inlet housing of a tractor cab ventilation system includes a rectangular housing with a surrounding flange co-planar with one end face so that the flange can be clamped between an abutment face surrounding the inlet opening and a dust filter conventional on the system. One end wall of the housing can be opened for insertion of a particulate absorption material for example activated charcoal.

대표청구항 ▼

A cab ventilation system comprising a plurality of walls defining an air inlet chamber having a rectangular inlet opening in one of said walls, said one of said walls defining flange means surrounding the opening and defining an abutment surface facing outwardly of the opening and surrounding the op

A cab ventilation system comprising a plurality of walls defining an air inlet chamber having a rectangular inlet opening in one of said walls, said one of said walls defining flange means surrounding the opening and defining an abutment surface facing outwardly of the opening and surrounding the opening, first resilient sealing means attached to the abutment surface and surrounding the opening, a dust filter having a rectangular casing having outer dimensions such that an outermost edge of the casing surrounds the opening and lies adjacent the flange means, and filter screen means defined inwardly of the casing, means mounting the casing such that it can be moved from an open position remote from the opening to a closed position in which air drawn into the opening passes through the dust filter, and a solid sorbent filter comprising a container with a length and width arranged to fit into the opening inside the flange means, said container having a thickness receiving therein a solid sorbent filter material, a flange surrounding the container at one face of the container such that the thickness of the container projects into the opening with the flange adjacent said abutment surface and in contact with said first resilient sealing means and second resilient sealing means attached to a surface of said flange remote from said first resilient sealing means and surrounding the container whereby the flange can be inserted between the dust filter and said abutment surface with said first resilient sealing means between said abutment surface and said flange and said second resilient sealing means between the flange and said casing.