A PLUG FOR THE SEALING CLOSURE OF AN OPENING IN A SHEET OF ABODY OR THE BOTTOM OF AN AUTOMOBILE

摘要

A plug for the sealing closure of an opening in a sheet of a body or the bottom of an automobile, comprising an integral body which includes a cap portion having an annular shirt portion and a cover portion connected to one end of the shirt portion, with the shirt portion tapering on the outer side towards the free end there of and the free end having an outer diameter which is smaller than the diameter of the opening a flange portion approximately at the level of the cover portion which exten ds obliquely outwardly and downwardly an annular sealing surface approximately at the same level as the connection of the cover portion to the shirt portion a nd below the connection of the flange, the height of the sealing surface being larger than the thickness of the sheet, the outer diameter of the sealing surface being slightly larger than the diameter of the opening with the cover portion and its connection t o the shirt portion being formed such that the plug body can be urged into the opening by an axial pressure on the cover portion under temporary reduction of the oute r diameter of the sealing surface and with the connection of the flange to the cover portion and the connection of the shirt portion to the cover portion and the dimensioning of these positions such that an outward pivoting of the flangep ortion upon insertion of the plug body into the opening approximately into the plan e of the associated side of the sheet a radial expansion force and/or a pivoting forc e on the sealing surface and the adjacent material is exerted so that the material in the area of the sealing surface on the other side of the sheet is formed against this si de of the sheet.