Patent ID: 7729083

Claim:
A sealed head disk assembly comprising: a base casting for providing attachment points for major components of said head disk assembly, said base casting comprising a hermetic seal encompassed by an outer perimeter of said base casting thus allowing said hermetic seal to be juxtaposed to at least one complementary surface on a cover; said cover for enclosing said major components of said head disk assembly, said cover comprising a semi-hermetic seal inside a perimeter of said complementary surface for said hermetic seal thus allowing said semi-hermetic seal to be juxtaposed to at least one complementary surface on said base casting; a screw coupled with said cover and configured such that when turned causes deflection in a zone of said cover that provides said hermetic seal against said complementary surface on said cover and said semi-hermetic seal against said complementary surface on said base casting; and screws outside a perimeter of said hermetic seal that join said cover to said base casting.