초록 ▼

A floating roof storage tank having an upstanding tank shell for containing liquid to be stored and having therein a floating roof floating on the surface of the stored liquid, a metal shoe carried by the floating roof and extending around the tank shell, a primary seal interconnecting the floating

A floating roof storage tank having an upstanding tank shell for containing liquid to be stored and having therein a floating roof floating on the surface of the stored liquid, a metal shoe carried by the floating roof and extending around the tank shell, a primary seal interconnecting the floating roof and the metal shoe, a plurality of seal support members shiftably mounted upon the metal shoe at the upper end thereof, a secondary seal extending between the upper rim of the floating roof and the seal support members and beyond the seal support members and against the inner surface of the tank shell; the seal support members are shiftable away from the tank shell a distance to permit inspection of the primary seal therebelow; limit structure acting between the metal shoe and the seal support members limit movement thereof to prevent the seal support members from contacting the tank shell.

대표청구항 ▼

A floating roof storage tank comprising an upstanding cylindrical tank shell for containing a quantity of liquid to be stored, a floating roof within said tank shell and adapted to float on the surface of the liquid within said tank shell, a circular metal shoe encircling said floating roof and slid

A floating roof storage tank comprising an upstanding cylindrical tank shell for containing a quantity of liquid to be stored, a floating roof within said tank shell and adapted to float on the surface of the liquid within said tank shell, a circular metal shoe encircling said floating roof and slidably engaging the inner surface of said tank shell, pusher structure mounting said metal shoe upon said floating roof and urging said metal shoe into sealing contact with the inner surface of said tank shell, a sealing member extending between said floating roof and said metal shoe and closing the space therebetween to provide a primary seal therebetween, a plurality of seal support members shiftably mounted upon said metal shoe adjacent to the upper end thereof and shiftable toward and away from the associated tank shell, and flexible means extending between said floating roof and said seal support members and secured thereto and extending beyond said seal support members and lying in sealing engagement with the inner surface of said tank shell to form a secondary seal between said floating roof and said tank shell, said seal support members being shiftable toward and away from said tank shell to accommodate variations in position of said floating roof with respect to said tank shell and being shiftable away from said tank shell to move said flexible means out of contact with said tank shell a distance to permit inspection of the primary seal.