Lock latch mechanism for transit vehicle door system

A locking device disposed within a door operator of a passenger transit vehicle door system for locking a first door hanger of such transit vehicle door system in a fully locked position, said first door hanger attached to a first door of such transit vehicle, said locking device further locking a second door hanger of such transit vehicle door system in said fully locked position, said second door hanger attached to a second door of such transit vehicle, said locking device further for unlocking said first door hanger and said second door hanger of such transit vehicle door system from said fully locked position, said locking device comprising:

• (a) a lock shaft disposed within said locking device;
• (b) a first lock bar disposed within said first door hanger, said first lock bar having a first lock cavity;
• (c) a second lock bar disposed within said second door hanger, said second lock bar having a second lock cavity;
• (d) a lock lever pivotably attached on said lock shaft, said lock lever engaging said first lock cavity and said second lock cavity in said fully locked position;
• (e) a lock actuator pivotably attached to said lock shaft for enabling said lock lever to move from said fully locked position to an unlock position;
• and
• (f) a lock latch mechanism disposed within such passenger transit door system, said lock latch mechanism including an unlocking cam attached to said lock shaft for rotation therewith, a lock latch lever pivotally biased for engagement with a first portion of said unlocking cam for maintaining said lock lever in said unlock position and for enabling movement of said first door hanger in a first opening direction and said second door hanger in a second opening direction and for enabling movement of said first door into a first open position and movement of said second door into a second open position, said lock latch lever biased for engagement with a second portion of said unlocking cam when said lock lever engaged with said first lock cavity and said second lock cavity, and a reset lever attached to one of said first and said second door hanger and engageable with said lock latch lever for pivotably moving thereof from engagement with said first portion into engagement with said second portion of said unlocking cam and for enabling rotation of said lock shaft and engagement of said lock lever with said first lock cavity and said second lock cavity in said fully locked position upon movement of said first door hanger in a first closing direction and said second door hanger in a second closing direction.