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US 4,630,530 AGranted
Filtering systems for buses
AssigneeTravel-Aire, Inc.
InventorsWilliam R. Eckstrom, John R. Conrad
Life of this patent
Estimating the term…
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AssigneeTravel-Aire, Inc.
InventorsWilliam R. Eckstrom, John R. Conrad
Estimating the term…
A filtering unit for a bus, the unit comprising one outer housing of a size to fit between the row of seats in the bus and a forwardly facing wall of a bus lavatory behind the seats, the housing having air inlet and air outlet openings for communication with ducts opening in upper and lower portions of the lavatory. The housing comprises a main housing body with an interior horizontal passageway of consistent cross sectional shape extending parallel to the rear of the outer housing, the main housing body having a horizontally facing opening at the outer end thereof which is covered by a panel which is movable to expose said opening, and a drawer unit slidable into or removable from said passageway through said opening. The drawer contains at least an air filter for removing at least lavatory odor-causing gaseous and particle materials from the air stream passing therethrough and an air circulating fan and drive motor therefor.
In a bus having a forwardly facing vertical lavatory wall spaced opposite a row of seats in the bus, said wall having a pair of openings extending therethrough, the improvement comprising:
The bus of claim 3 wherein one of said housing openings is located at the top of a vertically extending duct-forming portion of said housing and defined by a rearwardly facing duct opening communicating with the interior of the portion of the housing therebelow.
A filtering unit for a bus, the unit comprising outer housing of a size to fit between a row of seats in the bus and a forwardly facing vertical wall of a bus lavatory behind said row of seats, the housing having an upper portion with a downwardly and forwardly inclining front wall portion for clearing the rearwardly sloping back portion of the adjacent row of seats, and air inlet and air outlet openings for communication with openings in vertically spaced portions of said vertical lavartory wall, said housing including air circulating fan means for drawing air from said air inlet opening and discharging filtered air through said air outlet opening, and an air filtering means in the path of movement of said air in said housing between said air inlet and air outlet openings and including means for removing at least lavatory odor-causing gaseous and particle materials from the air stream passing therethrough.
In a bus having a forwardly facing vertical lavatory wall spaced opposite a row of seats in the bus located on one side of an aisle in said bus, said wall having a pair of openings extending therethrough, the improvement comprising:
In a filtering unit for a bus the filtering unit comprising a housing having air inlet and air outlet openings, said housing including air circulating fan means for drawing air from said air inlet opening and discharging air from the air inlet opening, and air filtering means in the path of movement of said air in said housing between said housing openings, the improvement wherein said housing has therein a horizontal passageway of substantially constant cross sectional shape, the housing having a horizontally facing opening at the outer end thereof which is covered by a closure which is movable to expose said opening, and a drawer unit slidable into or removable from said passageway through said opening, the drawer containing said air filtering means and when moved to an exposed position providing access to said filtering means for replacement thereof, said drawer also including said air circulating fan means and a drive motor therefor.
An air filtering system for removing dust and other relatively large particle-containing contaminants from an air stream as well as much smaller odor-producing contaminants of an air stream, said filtering system comprising an integrated assembly of serially disposed individual air filtering units of about the same size and located between air inlet and filtered air outlet ends of the assembly, the assembly being adapted to be inserted as an integrated whole into a duct but where each filtering unit is separable from the other for replacement purposes, each unit comprising a peripheral frame defining similarly sized air inlet and outlet openings, the peripheral frames of the filter units being in abutment to form a sandwich of such elements, a first filtering unit located nearest said air inlet and including filtering means for removing relatively large heavy solid materials, like dust, a second filtering unit downstream from said first filtering unit including means for removing said smaller odor-producing particle contaminants from the air stream passing therethrough, and a third filtering unit located between said first and second units and having its peripheral frame sandwiched between and being peripherally sealed between the peripheral frames of the other filtering units, said third filter unit being an ultraviolet lamp-containing unit for destroying odorproducing bacteria.
The air filtering system of claim, 18 wherein the odor-producing particle filtering means is a multi-purpose air filtering unit which comprises a mixture of small and large dispersed particles which filter different particles from the air stream.
Dependencies are inferred from the claim text.