Overfill and spillage protection device

An overfill and spillage protection assembly, comprising:

• an underground storage tank for storing a motor fuel selected from the group consisting of gasoline and diesel fuel, said underground storage tank having an outlet and a generally upwardly facing inlet;
• an upright fill tube connected to and extending generally upwardly from said inlet of said underground storage tank for filling said motor fuel from a fill hose of a tank truck into said underground storage tank and for containing at least a portion of any overfill from said underground tank, said fill tube having a bottom portion and a top;
• an annular reservoir concentrically mounted about said fill tube at a location spaced above said underground storage tank and below the top of said fill tube for containing spillage from said fill hose and overfill from said fill tube, said reservoir defining a lower section and an upper section with an exterior surface and having a capacity greater than the volumetric capacity of said fill hose;
• a drain connected to the bottom portion of said fill tube below said reservoir;
• a one-way valve operatively connected to and communicating with the lower section of said reservoir for permitting passage of motor fuel in said reservoir into said drain for passage through the bottom portion of said fill tube into said underground storage tank when a substantial portion of the motor fuel in said tank is withdrawn through said outlet and for substantially blocking upward flow of overfill from said tank through said valve;
• a removable annular screen concentrically positioned about said fill tube and upon the upper section of said reservoir for substantially preventing debris from falling into said reservoir, said debris including at least one member selected from the group consisting of dirt, leaves, cigarettes, bugs, snow, ice, and fragments thereof;
• a collar extending generally upwardly from the upper section of said reservoir, said collar being concentrically positioned about the top of said fill tube to define an annular passageway therebetween for passage of overfill from said fill tube into said reservoir and having an upper portion spaced above the top of said fill tube;
• a cap for engaging the upper portion of said collar to provide secondary protective covering for said fill tube and said reservoir;
• a manhole cover spaced above said cap to provide primary protective covering for said fill tube and said reservoir;
• and
• a manhole skirt extending downwardly from said manhole cover to a location above said reservoir and being spaced about said collar to define a drainage passageway therebetween for passage of water and debris over the exterior surface of said reservoir.

An overfill and spillage protection assembly, comprising:

• an underground storage tank for storing a motor fuel selected from the group consisting of gasoline and diesel fuel, said underground storage tank having an outlet and a generally upwardly facing inlet;
• an interior upright fill tube connected to and extending generally upwardly from said inlet of said underground storage tank for filling said motor fuel from a fill hose of a tank truck into said underground storage tank, said fill tube having a bottom extending into said storage tank and a top defining an inlet mouth;
• an exterior vapor return tube mounted concentrically about and positioned outwardly from said interior fill tube to define an annular chamber therebetween for upward flow of vapors and overfill of motor fuel from said underground storage tank, said exterior vapor return tube having a bottom portion secured to said storage tank and a top for receiving an adapter for releasable connection to a vapor return hose;
• an annular reservoir providing a collection basin concentrically mounted about said exterior vapor return tube at a location spaced above said underground storage tank and below the tops of said tubes for containing spillage from said fill hose and overfill from said interior vapor return tube, said reservoir defining a lower section and an upper section with an exterior surface and having a volumetric capacity greater than the volumetric capacity of said vapor return hose;
• a drain connected to the bottom portion of said exterior vapor return tube below said reservoir;
• a one-way valve operatively connected to and communicating with the lower section of said reservoir and said drain for permitting passage of motor fuel in said reservoir into said drain for passage through the annular chamber about the bottom portion of said exterior vapor return tube into said underground storage tank when a substantial portion of the motor fuel in said tank is withdrawn through said outlet and for substantially blocking upward flow of overfill in said annular chamber from said underground storage tank through said valve;
• a removable annular screen concentrically positioned about said exterior vapor return tube and upon the upper section of said reservoir for substantially preventing debris from falling into said reservoir, said debris comprising at least one member selected from the group consisting of dirt, leaves, cigarettes, bugs, snow, ice, and fragments thereof;
• a collar extending generally upwardly from the upper section of said reservoir, said collar being concentrically positioned about the top of said exterior vapor return tube to define an annular passageway therebetween for passage of overfill from the top of said exterior vapor return tube into said reservoir and having an upper portion spaced above the top of said exterior vapor return tube;
• a cap for engaging the upper portion of said collar to provide secondary protective covering for said tubes and said reservoir;
• a manhole cover spaced above said cap to provide primary protective covering for said tubes and said reservoir;
• and
• a manhole skirt extending downwardly from said manhole cover to a location above said reservoir and being spaced about said collar to define a drainage passageway therebetween for passage of water and debris over the exterior, surface of said reservoir.