Tractor Cab Heating and Ventilating Systems
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jan 5, 2012
app pub date -
Dec 11, 2009
filing date -
Dec 11, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A tractor cab HVAC system having an HVAC unit (11) which receives and processes fresh air drawn in via an air intake (43) and recirculated air from at least one recirculation duct (47). The system has at least one air distribution duct (27,28) through which processed air from the HVAC unit is introduced into the cab. A first blower (23) is provided which primarily distributes processed air from the HVAC unit (11) to the distribution duct (27,28), and a second blower (22) which selectively draws air into the HVAC unit (11) through the air intake (43) and/or re-circulation duct (47). The ratio of fresh air to recirculated air drawn into the HVAC unit (11) by the second blower (22) is variable by one or more flaps (60,62) which control the flow of air into the HVAC unit (11) through the air intake (43) and circulation duct (47).
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