Patent ID: 6050764
Filing Date: 2000-04-18
Classification: G01D

Abstract:
A measuring device comprising:a cylindrical connection piece,a collar which engages around at least one section of the connection piece and is to be fastened at a measuring location,a restraining means, by which the connection piece is fastened in the collar,an annular seal which is arranged in the collar and bears in a sealing manner against the connection piece, anda thrust ring which is releasably fastened in the collar and, in an end position, puts the seal under pressure in the axial direction,the restraining means being designed as a clamping means which can be released from a clamped state just by the action of an external force, and the clamped state being effected by the end position of the thrust ring,wherein, when the thrust ring is released and a positive pressure is prevailing at the measuring location, the positive pressure acts on the clamping means and displaces the thrust ring in the axial direction until the thrust ring engages in a first snap-in means for maintaining the thrust ring in a fixed position in which it cannot be released fully from the collar, andwherein, in the engaged state, the restraining means is connected to the thrust ring fixedly or via a second snap-in means for connecting the restraining means to the thrust ring.