Patent ID: 6125768
Filing Date: 2000-10-03
Classification: B61D,E05F,E05Y

Abstract:
An operator for a mass transit vehicle door system having a pair of biparting doors, said operator comprising:(a) a base for attachment to such mass transit vehicle;(b) a motive power source;(c) a transmission connected to said motive power source to receive motive power therefrom, said transmission having a transmission output power shaft;(d) at least one of said motive power source and said transmission being attached to said base;(e) a teeter plate, said teeter plate including;(i) a shaft engaging portion for engaging said transmission output power shaft, and(ii) a hub portion;(f) a thrust bearing in mechanical contact with said hub portion of said teeter plate;(g) a spring in mechanical contact with said thrust bearing for exerting a first axial thrust thereon, said thrust bearing communicating said first axial thrust to said teeter plate so that said shaft engaging portion of said teeter plate engages said transmission output power shaft;(h) a release member having mechanical contact with said hub portion of said teeter plate for exerting a second axial thrust on said teeter plate, said second axial thrust being opposed to said first axial thrust so that said teeter plate may be disengaged from said transmission output power shaft by said release member; and(i) a pair of drive rod pivots attached to said teeter plate and connected to a pair of drive rods for opening and closing such pair of biparting doors.