Patent ID: 9366374
Filing Date: 2016-06-14
CPC Classification: B63B,F16L

Claim Text:
1. A closure element for closing off a bore subjected to internal pressure, comprising: a sleeve-shaped main body adapted for insertion into the bore, an expanding body having a cup shape and comprising a base at a top of said expanding body and a substantially cylindrical wall connected to a bottom of said base, said base forming a cover for the bore when said main body is inserted into the bore, and a bent transition region connected on an outer side to said main body and on an inner side to said cylindrical wall of said expanding body; said main body being configured such that when inserted into the bore, a cylindrical wall of said main body extending upward from said bent transition region has an outer circumferential surface that rests in its entirety against an inner surface of the bore, said bent transition region being situated relative to said main body such that when said main body is inserted into the bore, said bent transition region is inside of the bore and entirely surrounded by a part of the inner surface of the bore against which the outer circumferential surface of said cylindrical wall of said main body rests, said cylindrical wall of said expanding body having a first inside portion surrounded by said main body prior to insertion of said main body into the bore and a second outside portion not surrounded by said main body prior to insertion of said main body into the bore; and wherein said main body and said expanding body are configured to cause said expanding body to provide a radially outwardly directed pressing effect against said cylindrical wall of said main body when said second outside portion of said cylindrical wall of said expanding body is surrounded by said main body in an installed position of the closure element in the bore, the pressing effect causing said main body to press against the inner surface of the bore when said closing element is in the bore and thereby form a seal between said main body and the inner surface of the bore.