Weather protective cover ventilator

A ventilator for a panel having a vent opening formed therethrough, said ventilator including a generally annular panel-like base for overlying and anchoring to one side of said panel, said base having a central opening therein and defining first and second remote sides with said first side of said base adapted to be mounted in at least reasonably good fluid tight sealed engagement with the portions of said panel extending about the vent opening formed in said panel, a cup-shaped cover defining a closed end, an open end and peripheral wall means extending about said closed end and between said closed end and said open end, said cover being constructed of a material rendering said cover shape retentive, but flexible and resilient to an extent that predetermined remote portions of said peripheral wall means, adjacent said open end, may be manually deflected inwardly and thereafter released for inherent return to non-inwardly deflected positions, said open end of said cover opposing and opening toward said second side of said base, said base and predetermined remote portions of said peripheral wall means including coacting anchor structure interlockingly engageable with each other upon return of said inwardly deflected portions of said wall means to their non-inwardly deflected positions, said cover including ventilation openings formed in said closed end, said coacting anchor structure including first radially outwardly projecting flanges carried by remote portions of said peripheral wall means adjacent said open end and second angle flanges carried by remote portions of said base and projecting outwardly from said second side and toward each other, said first flanges being removably captively receivable beneath said second flanges upon inward deflection of said remote portions of said peripheral wall means and subsequent release of said peripheral wall means remote portions for return to non-inwardly deflected positions.