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A locking cover apparatus for underground fuel tanks includes a cover having a depending annular flange mountable over the open end of a fuel tank filler tube. A lock is mounted on a boss secured to the bottom surface of the cover and rotates a plate between a locked position and an unlocked positio

A locking cover apparatus for underground fuel tanks includes a cover having a depending annular flange mountable over the open end of a fuel tank filler tube. A lock is mounted on a boss secured to the bottom surface of the cover and rotates a plate between a locked position and an unlocked position. A plurality of lock bars are pivotally attached to the plate and are extensible and retractable through apertures in the depending flange and apertures in the filler tube for attaching and releasing the cover from engagement with the filler tube. First and second cover members respectively cover the lock and the boss in which the lock is mounted on the cover. Specially configured keys are insertable into cavities formed in the first and second cover members to permit authorized removal of the cover members from the cover.

대표청구항 ▼

A locking apparatus for underground fuel tanks having a vertically extending filler tube with a plurality of apertures in the side walls thereof, the locking apparatus comprising: a cover having top and bottom surfaces and a centrally located aperture; an annular flange depending from the bottom sur

A locking apparatus for underground fuel tanks having a vertically extending filler tube with a plurality of apertures in the side walls thereof, the locking apparatus comprising: a cover having top and bottom surfaces and a centrally located aperture; an annular flange depending from the bottom surface of the cover, having a plurality of apertures formed in the flange and alignable with the apertures in the fuel tank filler tube; lock means mounted on the cover and selectively movable between a first locked position and a second unlocked position; a plate mounted on and rotated by the lock means between the first and second positions; a plurality of lock bars, each slidingly received in one aperture on the flange of the cover, the lock bars having first and second ends, with the first end being pivotally mounted on the plate, and the second end being slidingly engagable with an aperture in the filler tube when the lock means and plate are rotated to the first locked position to lock the cover on the filler tube when the lock means and plate are rotated to the second unlocked position to unlock the cover from the filler tube; and first means for removably covering the lock means to prevent access to the lock means, comprising: a first boss mounted on the bottom surface of the cover, the first boss having a bore co-axially aligned with the aperture in the cover and including internal threads extending from an upper end thereof; a disc having external threads on the first boss; engagable with the internal threads on the first boss; a cavity formed in the disc; and a first key means having an outwardly extending projection complementary to the cavity in the disc and insertable into the cavity to permit removal of the disc from the first boss.