Patent ID: 8596484

Claim:
A closure for pressurized system or vessel, comprising: a hub having a generally cylindrical shape with a central opening and a head which is operably connected to said hub and is movable between a first closed position sealing said central opening and a second open position; a central post extending from said head; a spool having a plurality of arms extending from said spool, said spool rotatably positioned about said post; said radial arms pivotally connected to said spool and pivotally connected to a locking ring segment, said locking ring segment having a recess for pivotally receiving said radial arm; a guide having at least two pieces, one of said two guide pieces disposed on said locking ring segment, the other of said two guide pieces disposed on said head; and, said spool and said post operably engaged wherein pivotal motion of said spool causes said spool to move axially along said post.