Patent ID: 9242551
Filing Date: 2016-01-26
CPC Classification: B60K,F02M,Y10S,Y10T

Claim Text:
1. A ventilation device comprising: a first enclosure including a first passage configured to be connected respectively to an outlet of a canister and to an atmosphere, and a normally closed shutter device configured to open to release the first passage; a second enclosure including a second passage configured to be connected to an inlet of the canister and to a fuel tank, and a normally open shutter device configured to close to shut the second passage, the second passage being separate from the first passage and not being in communication therewith inside the device; and a combined pressure/vacuum relief valve or an OPR and UPR valve pair situated in or fastened to a bypass of the first passage configured to establish a connection between ends of the first passage when the shutter device is closed and when there is over-pressure or under-pressure from end to end of the first passage.