Patent ID: 7967347

Claim:
A vacuum actuated automatic door latching assembly for unlocking a door of a delivery vehicle, comprising: a. a latch operatively associated with the door for latching the door, the latch movable between the lock and unlocked positions; b. a pneumatic actuator operatively associated with the latch for causing the latch to move between the locked and unlocked positions; c. a vacuum line connected to the pneumatic actuator and adapted to connect to a vacuum source associated with the vehicle; d. a control valve disposed between the vacuum source and the pneumatic actuator for controlling the activation of the pneumatic actuator; and e. a biasing device engaging the door and biasing the door towards an open position; f. wherein the device includes a spring; and g. wherein the spring is adapted to extend between a stop disposed on the door and an area adjacent the door, and wherein the position of the spring is adjustable with respect to the door.