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Electric device for opening or shutting automative doors

  • US 4,644,693 A
  • Filed: 08/20/1985
  • Issued: 02/24/1987
  • Est. Priority Date: 08/20/1985
  • Status: Expired due to Fees
First Claim
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1. An apparatus for opening and closing vehicle doors, comprising in combination:

  • a means for opening a door lock;

    a means for moving a vehicle door;

    said means for moving being mounted in a vehicle door;

    said means for operating a door lock being mounted in the door;

    said means for moving the door including a rack member;

    said rack member having a pinned end and a free end;

    said pinned end being pinned to a frame which does not move with the door;

    said means for moving the vehicle door including an electrically operated motor connected to said rack;

    said motor being fixed to the door;

    said motor having an output gear which is in toothed engagement with said rack;

    a means for retaining said rack in engagement with said gear during angular motion of said rack relative to said motor;

    a control means for controlling operation of said motor and operation of said door lock;

    said control means having 3 states;

    in a first state, power is supplied to said means for controlling said door lock to open said door lock;

    an electromagnetically operated clutch connected to said motor to transmit rotary motion from said motor to said output gear only when said clutch is energized;

    in said first state, said control means also supplying power to said motor and to said clutch, whereby said motor operates in a forward direction to cause opening of the vehicle door;

    in a second state, said control means cuts off power to said motor, said clutch, and said means for operating said door lock;

    in a third state, said control means supplying power of a reversed polarity to said motor;

    said control means in said third state supplying power to said clutch but not to said means for opening said door lock;

    whereby said reversed polarity causes reversed movement of said motor to cause closing of the vehicle door;

    in said second state, said clutch is disengaged from said output gear so as to permit manual operation of the vehicle door.

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