Bladder construction for pressure vessels

Claim 1

A PRESSURE VESSEL COMPRISING A RIGID HOLLOW CONTAINER HAVING AN OPENING AND AN OPPOSED PORT, A PARTITION OF RESILIENT DEFORMABLE MATERIAL IN SAID CONTAINER, SAID PARTITION HAVING A PERIPHERAL RIM AND EXTENDING ACROSS THE CONTAINER AND INTERVENING BETWEEN SAID OPENING AND SAID PORT, AN ANNULAR SUPPORTING MEMBER OF RIGID MATERIAL HAVING A FLAT SURFACE BONDED TO SAID PARTITION AT THE RIM THEREOF, WHEREBY STRESS IS PRODUCED AGAINST THE BONDED SURFACE IN USE OF THE PRESSURE VESSEL, THE LENGTH OF THE PARTITION MATERIAL AT LEAST ONE OF THE WALL SURFACES OF THE PARTITION ADJACENT THE RIM THEREOF BEING LONGER THAN THE LENGTH OF THE PARTITION MATERIAL BETWEEN THE OPPOSED WALL SURFACES OF THE PARTITION ADJACENT THE RIM THEREOF, WHEREBY THE STRESS OF THE BONDED PORTION OF THE RIM OF THE PARTITION AGAINST THE SUPPORTING MEMBER AT SUCH LONGER WALL SURFACE IN USE OF THE PRESSURE VESSEL WILL BE REDUCED, MOUNTING MEANS FOR THE RIM OF THE PARTITION AT THE PERIPHERY OF SAID OPENING AND EXTENDING SUBSTANTIALLY LATERALLY OUTWARD FROM SAID OPENING TO GUIDE THE PORTION OF THE PARTITION ADJACENT ITS RIM IN USE OF THE PRESSURE VESSEL SO AS TO MAINTAIN THE DIRECTION OF THE STRESS OF THE PARTITION MATERIAL INTERVENING BETWEEN THE EXTERIOR SURFACES OF THE PARTITION ADJACENT ITS RIB, EXERTED AGAINST THE BONDING SURFACE AT SUBSTANTIALLY RIGHT ANGLES THERETO, A COVER PLATE ADAPTED TO EXTEND OVER SAID OPENING AND MEANS TO RETAIN SAID COVER PLATE IN CLOSED POSITION WITH RESPECT TO SAID OPENING, RIGID ANNULAR SUPPORTING MEMBER SPACING SAID COVER PLATE FROM SAID MOUNTING MEANS.