Seal has strap protruding from opening that bounds opening smaller than thinner shaft section diameter before inserting shaft, which deforms it to bound opening smaller than thicker section diameter

摘要

The device has a plate (102) of elastically deformable with at least one opening (112) for the shaft of an attachment arrangement with a thinner region between its head and shaft. At least one holding strap (116) protruding from the opening bounds a core opening (122) smaller that the diameter of the thinner shaft section before insertion of the shaft, which deforms it so it bounds a larger opening that is smaller than the diameter of the thicker shaft section. Independent claims are also included for the following: (a) a pre-assembly unit (b) and a unit containing a pre-assembly unit.