Patent ID: 7357279

Claim:
A portable fuel tank comprising: a fuel-storing seat including a tank wall that defines a fuel-storing chamber and that is formed with a fuel-feeding port at an upper portion thereof, and a fuel-discharging port at a lower portion thereof; a cap mounted removably on said fuel-storing seat for covering said fuel-feeding port; and a control mechanism including a valve that is disposed movably within said fuel-storing seat, said valve being biased to a sealing position so as to close said fuel-discharging port in said fuel-storing seat, said valve being movable to a non-sealing position so as to separate from said fuel-discharging port, thereby allowing for drainage of fuel from said fuel-storing chamber through said fuel-discharging port by virtue of gravity; said control mechanism further includes: a mounting seat including a surrounding wall that extends inwardly from a portion of said tank wall defining said fuel-discharging port, and a fuel opening that is formed in said surrounding wall at a position adjacent to said fuel-discharging port and that is in spatial communication with said fuel-storing chamber in said fuel-storing seat, said fuel opening being in fluid communication with said fuel-discharging port when said valve is disposed at said non-sealing position; a fuel seal disposed between said valve and said tank wall so as to establish a liquid-tight seal therebetween when said valve is disposed at said sealing position; and a resilient member for biasing said valve to said sealing position; and wherein said portable fuel tank further includes a fuel-unloading unit that includes: a tubular threaded seat mounted removably on an outer surface of said tank wall of said fuel-storing seat and disposed around said fuel-discharging port; and a flexible hose connected to and in fluid communication with said threaded seat; said control mechanism further including: a controlling member engaging threadably said threaded seat; and a valve-pushing rod including a base plate disposed movably within said threaded seat and having at least one hole therethrough, and a pushing rod portion projecting from said base plate toward said valve, said pushing rod portion being movable toward said valve so as to move said valve to said non-sealing position when said controlling member is rotated relative to said threaded seat in a predetermined direction.