Patent ID: 8376000
Filing Date: 2013-02-19
Classification: B01D,B67D,Y10T

Abstract:
1. A passive gasoline vapor treating system including; a hydrocarbon filter apparatus interconnected to a fuel tank having a range of vapor pressures therein over time, said filter apparatus configured to receive and load hydrocarbon vapors from said tank in response to one vapor pressure in said fuel tank, said filter apparatus being in direct fluid communication with the atmosphere and configured to deliver air from the atmosphere, and hydrocarbon vapor, to said tank in response to another vapor pressure in said tank lower than said one vapor pressure for unloading said filter, said filter configured to operate between hydrocarbon loading and hydrocarbon unloading cycles independently of any other hydrocarbon removal apparatus, the passage of air through said filter being in direct response to said vapor pressures; and a valve operatively coupled to a pressure sensor, wherein the valve is configured to be opened when the pressure sensor senses a sufficiently low pressure to enable air to flow from the atmosphere to the fuel tank via the filter.