| 摘要 |
<p>A simple to operate locking mechanism for a pressure cooker, the locking mechanism having a locking arm rotatable from a fully open to a fully locked position, the locking arm (11) being operatively connected to a cam shaft assembly (30) which is rotatable with the locking arm, the cam shaft assembly being slidably axially in a cam shaft sleeve (40) rotatably mounted in a displacement member (20) which causes the cam shaft assembly to be axially displaced as it is rotated by the locking arm, the cam shaft assembly being moveable from a retracted to an extended position as the locking arm moves from a fully open to an intermediate position. A safety mechanism (51-57) is provided to prevent rotation of the locking arm from the intermediate to the fully locked position in the event the cam shaft assembly is not fully extended. A pressure responsive safety mechanism (58, 59) is also provided to prevent opening movement of the locking mechanism in the event the cooker is under pressure.</p> |
