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Transit car power door obstruction sensing system and device

  • US 5,280,754 A
  • Filed: 07/02/1992
  • Issued: 01/25/1994
  • Est. Priority Date: 05/10/1991
  • Status: Expired due to Fees
First Claim
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1. In a vehicle having integral tractive power and power operated doors, a system for detecting an uncontrolled door and providing selective removal of an obstruction encountered in the path of a power operated vehicular door, in travel from open to closed positions, the improvement comprising:

  • an opening in a vehicle side wall, said opening having essentially parallel, vertical edges;

    a door panel mounted on said side wall for travel across said opening;

    means for driving said panel, said driving means moving said door in travel from open to closed and closed to open positions across said opening;

    means in said driving means for locking said door on reaching said door closed position;

    a first leading edge on said panel, said panel edge traversing said opening for door travel from open to closed, and closed to open positions;

    a second and adjacent edge on said side wall cooperating with said first panel edge for sealing said opening when said panel is in a closed position;

    a switch actuator on said car side wall and operated by said door for closing door travel to a first door position, said first door position intermediate said door open and door closed positions, said first door position and said edges defining an obstruction withdrawal spacing between said first and second edges, said spacing selectively allowing withdrawal of semi-rigid obstructions prior to said door movement to a door closed and locked position;

    a first switch operated by said actuator for closing door travel, said switch having a first operational state during said door closing travel to said first door position, and a second operational state for said travel from said first door position to said closed position, said first switch first state generating a door obstruction signal;

    a second door position intermediate door open and first door position;

    a second switch on said switch actuator operable by said door on reaching said second position during said door travel from open to closed, said switch having a first operational state during said door closing travel from said door open position to said second door position, and a second operational state for door travel from said second door position to said door closed position, said second switch first state generating a freewheeling door signal;

    means in said drive means responsive to said obstruction and free wheeling door signals to inhibit said vehicle traction power;

    thereby preventing vehicle motion and actuation of said lock until said obstruction is removed.

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