초록

A plastic drum lid for a standard lidded drum using a clamping member to seal the lid to the drum. The lid includes a central top section of a smaller diameter then the diameter of the lid, with the central section spaced from the rim of the lid by a circumferential groove.

대표청구항 ▼

In a plastic drum lid (2) for a liquid-tight lidded drum (1) having a drum body with an outer body wall (3) ending in a top end (8) to define a drum opening, the lid having a central lid section (16), a lid rim (18) with an inner rim wall (19) and an upper end (17) surrounding the central section (1

In a plastic drum lid (2) for a liquid-tight lidded drum (1) having a drum body with an outer body wall (3) ending in a top end (8) to define a drum opening, the lid having a central lid section (16), a lid rim (18) with an inner rim wall (19) and an upper end (17) surrounding the central section (16) for engaging with the body wall (3) to close the opening defined by the top end (8), thereof, and a clamping region at which the lid is to be clamped to said drum, the improvement comprising: a) the central lid section (16) is spaced radially inwardly from said lid rim (18); b) said lid (2) further includes a first conical section (22) disposed along the periphery of said central section (16) and extending downwardly and radially outwardly from said central section (16) to define an annular circumferential groove (24) between the central section (16) and the inner rim wall (19); c) the first section (22) extends downwardly to a first lower end; d) a second annular section (23) is connected between said lower end of the first section (22) and the inner rim wall (19); e) the second annular section (23) is spaced below said central section and extends substantially at a right angle from the inner rim wall (19) of the lid rim; f) the inner rim wall (19) extends downwardly to define a lower end portion disposed below the second annular section (23); g) an inner ring piece (25) extends downwardly from the lower end of the first section (22) in spaced relation to the inner rim wall (19) to define, with the second annular section (23) and the lower end portion of said inner rim wall (19), a reinforced, inverted U-shaped support; and h) the second annular section (23) is connected to the inner rim wall (19) of the lid rim at a height level no higher than the clamping region of said lid.