Patent ID: 7364209

Claim:
A mechanical latch assembly, comprising: a supporting frame; a locking latch slidably mounted on said supporting frame in longitudinally movable manner; an actuation arrangement comprising an actuation handle pivotally connected to said supporting frame to longitudinally drive said locking latch moving between a locked position that said locking latch is outwardly slid on said supporting frame and an unlocked position that said locking latch is inwardly slid on said supporting frame; and a safety lock arrangement, comprising: a locker member movably mounted on said supporting frame, wherein said locker member has a slider slot formed thereon to define a pusher surface and an opposed retracting surface; and a thermal arm substantially extended from said supporting frame to slidably pass through said slider slot of said locker member at a safety temperature, wherein when said thermal activated arm is heated up at an operation temperature, said thermal activated arm is deflected to push said locker member at said pusher surface such that said locker member is moved to engage with said actuation arrangement so as to lock up said actuation handle while said locking latch is at said locked position, wherein when said thermal activated arm is cooled down to said safety temperature, said thermal activated arm is restored to push said locker member at said retracting surface that said locker member is normally disengaged with said actuation arrangement such that said actuation handle is allowed to actuate said locking latch to said unlocked position.