Patent ID: 8052006
Filing Date: 2011-11-08
Classification: B01J,F16J,Y10T

Abstract:
1. A closure for a vessel, comprising: a hub having an access opening to the vessel, the hub having a circumferential stop face spaced between the access opening and the vessel and a plurality of recesses each extending radially outward from an adjacent inner surface of the hub; a door for positioning between the stop face and the vessel; an annular seal for sealing between the door and the stop face; a latch member for bringing the door to sealing engagement with the stop face, such that fluid pressure in the vessel forces the door against the stop face; and a plurality of lugs each extending radially outward from an adjacent exterior surface of the door, such that during opening of the closure a respective lug passes through a respective recess in the hub and a portion of the annular seal extends radially outward of the door and circumferentially along a respective lug to seal between the respective lug and the hub, and the door may be moved to pass through the plurality of recesses and out of the hub.