Pressure chamber with power-operated door

摘要

A pressure chamber, especially a steam sterilizer, with a front head ring 2 and opening 3, has a power- operated door 4 opened and closed by bodily vertical movement through motor drive of a vertical lead screw 10 and drive nut 17 on which the door 4 is pivotally mounted and biased so that the door constantly tends to rock away from the head ring. Co-operating wedge surfaces 31, 32, and 33, 34 are provided on the door and head ring to guide the door into sealed closure and allow the door to rock open slightly, for venting, as opening of the door begins.