Patent ID: 6176275
Filing Date: 2001-01-23
Classification: B67D

Abstract:
A fuel delivery and vapor recovery system for a mobile fueler, comprising:a mobile storage tank having a liquid region and a vapor region therein, the storage tank being at least partially covered with a layer of insulation providing a predetermined thermal insulating value;a supply pump connected to the storage tank for delivering fuel from the liquid region, the supply pump configured for generating a fuel pressure between 26 and about 40 psi in a supply line leading from the storage tank;a fuel dispensing assembly connected to the supply line, and including a supply outlet for delivering fuel from the storage tank to a vehicle being fueled, and a vapor recovery inlet proximate the supply outlet;a diverter valve for diverting a portion of the fuel in the supply line;a vacuum jet pump connected by a vapor line to the vapor recovery inlet and connected to the diverter valve, the vacuum jet pump being driven by the fuel diverted from the supply line to create a predetermined vacuum pressure in the vapor line of between -34 inches w.g. and about -70 inches w.g. when the supply outlet is open, the vacuum jet pump being connected to the storage tank to direct vapor in the vapor line into the vapor region of the storage tank;a vapor pot in the vapor line for separating liquid fuel from vapor in the vapor line; anda check valve connected between the vapor line and the vapor region of the storage tank for maintaining pressure in the vapor line within a predetermined pressure range.