Patent ID: 7228804
Filing Date: 2007-06-12
Classification: E05B,E05F,E05Y

Abstract:
1. A door system in a transit vehicle for at least partially covering and uncovering a door portal aperture of said transit vehicle, said door portal aperture having a first sealing means attached to at least one edge thereof, said door system comprising: (a) at least one door having a second sealing means disposed at a leading edge thereof; (b) a door drive means disposed within said transit vehicle for moving said at least one door in an opening and a closing direction, said door drive means including: (c) a brake having a stationary magnet, an armature axially disposed at a predetermined air gap X from said stationary magnet and attracted thereto by a force of the magnetic field over said predetermined air gap X to said magnet resulting in a frictionally engaged connection, a hub directly attached to said armature and to one of said prime mover shaft and said drive spindle for rotation therewith, at least one spring disposed between said armature and said hub, and a wiring connection for receiving said at least one brake signal, said brake maintaining said at least one door in a first locked position and maintaining a compression of said first sealing with said second sealing means produced by said door drive means, said brake adapted for receiving at least one brake signal for an application and a release thereof.