The invention incorporates a high flow, pilot actuated pressure relief/rollover valve into a refueling vapor recovery system having a vapor vent line for recirculating vapor past the aspirator of a refueling nozzle and a nozzle seal for engaging a refueling nozzle in an airtight manner. All vapor of...http://www.google.de/patents/US5183087?utm_source=gb-gplus-sharePatent US5183087 - Refueling vapor recovery system
