Patent ID: 6739092
Filing Date: 2004-05-25
Classification: B61D,E05B,E05F,E05Y

Abstract:
A door lock for at least one door panel mounted on a door operator attached to a transit vehicle, such door operator including a door panel drive means, said door lock comprising:(a) a lock shaft to be mounted on such operator of such door panel, oriented in a direction disposed substantially parallel to an opening direction and a closing direction of such at least one door panel, said lock shaft having at least one lock roller mounted thereon; (b) at least one primary lock means connected to said lock shaft, said primary lock means engagable with such door panel drive means for preventing motion of such door panel drive means; (c) at least one secondary lock means connected to said lock shaft, said secondary lock means engagable with at least one of such door panel and a hanger for such door panel for preventing movement of such door panel; (d) at least one lock cam engaging said lock roller of said lock shaft and rotating said lock shaft from an unlocking position to a locking position when such at least one door panel is moved in such closing direction to a closed position of such at least one door panel, said at least one lock cam attached to said hanger, said at least one lock cam is mounted to rotate to permit said at least one lock roller of said lock shaft to pass thereby when such at least one door panel moves in such opening direction; said at least one lock cam is provided with a helical spring for biasing said at least one lock cam into a position for engaging said at least one lock roller; and (e) an unlocking actuator attachable to such door operator, said unlocking actuator having a moveable portion connected to said lock shaft to rotate said lock shaft to said unlocking position of said lock shaft for unlocking such at least one door panel, said movable portion adapted for downward movement to rotate said lock shaft to said unlocking position.