Patent ID: 6094867
Filing Date: 2000-08-01
Classification: B61D,E05D,E05F,E05Y

Abstract:
A lock operable by a power door operator for maintaining a door panel in a closed position over an opening in a mass transit vehicle, said power door operator having:a door hanger mountable overhead of said opening;door drive means internal said hanger, said door drive means including a rotary helical drive member having mechanical connection to a motor and a cooperating drive nut providing reciprocal motion of said drive nut over and away from said opening, on rotation of said helical drive member;a door panel bracket attachable to said door panel, said door panel bracket mounted for movement on said hanger, said door panel bracket attached to said drive nut;said lock comprising:a ratchet wheel having mechanical connection to said helical drive member;a lock pawl actuable to engage said ratchet wheel to prevent rotation of said helical drive member when said door panel is in said closed position to provide primary locking of said door panel; andsaid lock pawl, when actuated to engage said ratchet wheel, further engaging said door panel bracket to provide secondary locking of said door panel.