Patent ID: 7082969
Filing Date: 2006-08-01
Classification: B67D

Abstract:
1. A closed loop system for transferring fluid with a vapor component from a fluid storage vessel to a fluid receiving container, which system is adapted to vent the fluid receiving container while preventing discharge of both vapor and fluid into the surrounding environment, said system comprising: an enclosed fluid-receiving container having upper and lower portions; a fluid flow receiving unit mounted proximate said fluid receiving container, said receiving unit having a pair of spaced fluid ports and a pair of non-spill coupling connectors extending from said fluid ports, one said port being a fluid inlet port and one said port being a vapor-fluid exit port, and a movable cover element for selectively covering and protecting said fluid ports and coupling connectors from contaminants when not in use; a fluid inlet line interconnecting said receiving unit inlet port with the interior of said fluid receiving container for directing fluid into the lower portion of said receiving container, and a vacuum return line interconnecting said receiving unit exit port with the interior of said fluid receiving container upper portion, the distal end of said vacuum return line being disposed in said receiving container upper portion at a level to evacuate vapor and neutralize pressure from the upper portion of said receiving container and to establish a pre-selected maximum fluid level in said receiving container; a fluid delivery apparatus including a dispensing head adapted for selective engagement with said receiving unit and having first and second end portions, said first end portion including a pair of spaced fluid coupling openings comprising a fluid delivery outlet and a vapor-fluid return inlet adapted for selective connection to the non-spill coupling connectors of, respectively, said receiving unit fluid inlet port and vapor-fluid exit port, and said second end portion having first and second fluid lines operatively coupling a fluid storage vessel with, respectively, said dispensing head fluid delivery outlet and vapor-fluid return inlet; a fluid vacuum pump associated with the fluid storage vessel for delivering fluid under pressure to said dispensing head and retrieving vapor from said dispensing head vapor-fluid return inlet; a fluid flow shut-off device disposed in said dispensing head and coupled to said vapor-fluid return inlet to prevent fluid flow therethrough; and a fluid flow termination element operatively connected to said fluid flow shut-off device to disengage said dispensing head from said receiving unit and terminate fluid flow from said storage vessel when activated by said shut-off device.