System for loading and unloading fluid tanks containing hazardous fluids
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 30, 2001
Grant Date -
N/A
app pub date -
Mar 4, 2000
filing date -
Mar 4, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for transferring a hazardous fluid product from a transport tank (10) of a roadway vehicle (12) to a fixed storage tank (14). A flexible transfer hose assembly (30) has end couplings (34, 36) which are detachably connected between the transport tank (10) and storage tank (14). A gas operated product supply valve (44) is opened by pressurized gas to permit flow of the hazardous product, such as propane, from tank (10). A gas control valve (46) controls the flow of pressurized gas to gas operated product supply valve (44). Upon a separation or rupture of flexible hose (31) or couplings (34, 36), the fluid pressure of the hazardous product in hose (31) is sensed at fluid sensing chamber (94) in gas control valve (46). A reduction in sensed fluid pressure to a predetermined maximum pressure results in movement of piston (82) to the position shown in FIG. 2 in which pressurized gas from gas source (43) is vented to atmosphere to result in closing of gas operated product supply valve (44) to stop the flow of hazardous product from tank (10). FIG. 7 shows the transfer of the hazardous fluid from a storage tank (14A) to a tank (10A) of a roadway vehicle.
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