As the fitting continues to advance in the cavity, the first contact annulus eventually expands to a sufficient diameter to allow the fitting to contact the second contact annulus.

A hoop stress caused by the contact between the fitting and the first contact annulus produces a strain in the wall portion of the housing adjacent to the first contact annulus.

The internal receiving surface comprises a first wall portion having a first contact annulus and a second wall portion having a second contact annulus.

This strain allows the diameter of the first contact annulus to expand.

Upon insertion of the fitting into an opening in the cavity of the housing, the fitting forms a primary seal with the first contact annulus and a secondary seal with the second contact annulus.

The secondary seal is formed as the surface of the fitting contacts the second contact annulus of the internal receiving surface of the housing.

The primary seal is formed as the surface of the fitting contacts the first contact annulus of the internal receiving surface of the housing.

The outputs (U, V, W, X, Y, Z) of the field winding (34) of the stator are fixed on said ring in such a way that they can be disengaged.

A ring grabbing rubber glove is disclosed, in which an engaging ring is provided at one side of a rubber glove for thereby holding the same, so that it is possible to easily remove water from a rubber glove without damaging the same.

The end or surface can be shaped to define a ring of contact, a centrally located contact region, or spherically shaped with a curvature that matches the curvatureof the spherical capitation chamber to which it is attached.

Specific connection pieces, in conjunction with a locking cam and engaging ring arrangement allow pre-plumbed columns to be quickly connected to the tiled sill assembly.