초록 ▼

A drum outlet and closure apparatus for use with cylindrical steel drums provides an outlet fitting with a peripheral shoulder that is generally S-shaped to accept a cap seal (such as a commercially available metallic cap seal). The shoulder thus protects an inwardly spaced threaded section. In anot

A drum outlet and closure apparatus for use with cylindrical steel drums provides an outlet fitting with a peripheral shoulder that is generally S-shaped to accept a cap seal (such as a commercially available metallic cap seal). The shoulder thus protects an inwardly spaced threaded section. In another embodiment, the drum outlet is formed of parent metal of the drum end, formed into an annular shoulder and then partially threaded. An upper unthreaded section is folded to define a closure sealing surface. The threaded section accepts a threaded closure fitting. An unthreaded lower interior section provides enhanced strength and protects the threading.

대표청구항 ▼

[ What is claimed as invention is:] [1.] A drum-type container construction comprising:a) a drum having a pair of circular ends and a cylindrically shaped side wall;b) one of the ends having a pair of openings including a fill opening of larger diameter and a vent opening of smaller diameter;c) the

[ What is claimed as invention is:] [1.] A drum-type container construction comprising:a) a drum having a pair of circular ends and a cylindrically shaped side wall;b) one of the ends having a pair of openings including a fill opening of larger diameter and a vent opening of smaller diameter;c) the larger diameter opening comprising an annular shoulder that is integrally formed with the parent metal of the drum end, said shoulder comprising:i) an exterior annular wall that extends at generally right angles to the drum end, said exterior annular wall having an upper end, and a lower base, said lower base beginning at and rising from the plane of the drum end, said exterior annular wall extending above the plane of the drum end from the lower base to the upper end;ii) an interior annular wall that extends at generally right angles to the drum and positioned internally and concentrically to the exterior annular wall, substantially abutting said exterior annular wall, said interior annular wall having an upper end, a lower section, and an interior annular wall spaced therebetween, the interior annular wall being internally threaded;iii) a curved annular upper transition portion forming the top of the shoulder and joining the upper ends of the exterior and interior annular walls;iv) the interior annular wall extending both above and into the plane of the drum end, thereby defining an upper section of the interior annular wall, extending above the plane of the drum end, the lower section of the interior annular wall extending into the plane of the drum end;v) the upper section of the interior annular wall internally and concentrically abutting the exterior annular wall; andvi) the lower section of the interior annular wall within the plain of the drum end and curving upwardly and annularly outward away from the opening of the larger diameter opening to substantially abut the base of the exterior annular wall.