Patent ID: 6065493
Filing Date: 2000-05-23
Classification: B63B,F16K,Y10T

Abstract:
A boat assembly, comprising:a boat hull defining an interior boat volume;a toilet within the interior boat volume;a sewage holding tank operatively connected to said toilet, and also within said interior boat volume, said tank having an inside;an outlet conduit from said holding tank, and including a dockside pumpout fitting;an indicator of the fullness of said holding tank at at least one level of fullness thereof;a gas vent from said holding tank; anda vacuum relief valve assembly for said holding tank to prevent adverse consequences associated with a vacuum condition in said tank said valve assembly comprising a valve body surface operatively connected to said tank and having a plurality of openings formed therein, a flexible material diaphragm covering said openings adjacent said inside of said tank, and uncovering openings to allow air flow therethrough substantially only when a vacuum condition exists inside said tank; anda support element mounted in contact with said flexible material diaphragm and providing a force on said diaphragm to releasably maintain said diaphragm in a position covering said openings.