Patent ID: 7942027

Claim:
A door latch for securing a door of a building in a closed condition, said door latch comprising: a housing; a handle rod assembled into said housing; a key-operable lock set assembled into said housing and including a movable key tab; a main lock pivotally connected to said handle rod and including a connecting slot, said main lock being constructed and arranged so as to be movable for lifting an engagement end; an unlocking latch pivotally connected to said handle rod and including slot-engagement means for operatively coupling with said connecting slot; a lock bar assembled to said housing and being movable relative to said housing between a locked position and an unlocked position; and wherein when said lock bar is in said locked position, said main lock is not pivotable from a position exterior to said building by use of said handle rod, said main lock being pivotable from a position interior to said building by manual lifting.