Patent ID: 8069952

Claim:
A fluid reservoir assembly for storing a fluid, said assembly comprising: a pan having an inner surface and an outer surface and defining a drain opening extending through said pan from said inner surface to said outer surface; a plug disposed within said drain opening and rotatably moveable between a closed position prohibiting fluid flow through said drain opening and an open position permitting fluid flow through said drain opening; said plug including a base disposed adjacent said outer surface and a shaft extending from said base along a central axis through said drain opening to a distal end and further including at least one wing disposed adjacent said inner surface and extending radially outward from said distal end transverse to said central axis; at least one ramp disposed on said inner surface of said pan adjacent said drain opening with said at least one wing in engagement with said ramp to move said base into sealing engagement against said outer surface when in said closed position and to move said base out of sealing engagement with said outer surface when in said open position; a lock mechanism to secure said plug in said closed position; and a stop to prevent rotation of said plug in said first direction past said closed position; wherein said plug includes a fracture geometry to ensure said at least one wing fractures before said stop fractures in response to over tightening of said plug.