Patent ID: 7347302

Claim:
The combination of an adaptor tube and an adaptor receiver, wherein: the adaptor receiver comprises a side wall circumferentially bounding an opening and a radially inwardly directed seat at an axially inner end of the side wall, the seat having axial thickness and a partial circumferential extent beginning at a slot in the opening; the adaptor tube comprises an outside on which is disposed a seal sealing the adaptor tube outside to the side wall of the adaptor receiver; the adaptor tube further comprises a gap that is radially outwardly open, that has axial thickness bounded on an axially outer side by a circular guide and on an axially inner side by a tab ( 101 ), and that is open at a circumferential end of the tab; the seat fits in the gap; and at the open circumferential end of the gap, the tab is circumferentially abutting a stop on the receiver that is more axially inward of the opening than the seat.