US20160324478A1_page_39

US20160324478A1 | page 39 | https://thedailydialectics.com/pdfs/wipow/US20160324478A1/US20160324478A1.pdf

US 2016/0324478 Al stent or extension 72. As shown in FIG. 2E, the main housing 73 of the module 70 of FIGS. 7A and 7B can include a ventilation opening or channel 73A enabling air to enter through a hole (not shown) in a end cap 75 and through the channel 73A to fill an area between the flange 74…