Wheelchair and alarm therefor

  • US 6,963,286 B2
  • Filed: 01/28/2003
  • Issued: 11/08/2005
  • Est. Priority Date: 02/27/2002
  • Status: Active Grant
First Claim
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1. A wheelchair comprising:

  • a frame comprising a pair of side frame portions and wheels rotatably connected to the side frame portions for rollingly supporting the frame, the frame further comprising a link assembly movably connecting the side frame portions together for movement between (a) an operative position wherein the side frame portions are spaced apart for facilitating rolling movement of the wheelchair and (b) a storage position wherein the side frame portions are moved inwardly from the operative position adjacent one another for facilitating storage of the wheelchair;

    a collapsible seat comprising a collapsible seat member connected between the side frame portions in a generally horizontal orientation and a collapsible seat back member connected between the side frame portions in a generally vertical orientation, the collapsible seat member and the collapsible seat back member being extended between the side frame portions in the operative position thereof to enable an occupant to sit on the seat member with a back of the occupant supported by the seat back member, the collapsible seat member and the collapsible seat back member being constructed to collapse in a folding manner between the side frame portions in the storage position thereof for enabling movement of the side frame portions from the operative position thereof to the storage position thereof; and

    an alarm system comprising;

    an alarm operable to emit a warning signal;

    an underseat alarm actuator communicated to the alarm; and

    a collapsible support connected between the alarm actuator and the frame so as to mount the alarm actuator such that, when the side frame portions are in the operative position, the alarm actuator is positioned in contact with a bottom surface of the seat member, the collapsible support being constructed to collapse as the side frame portions move to the storage position thereof for enabling movement of the side frame portions from the operative position thereof to the storage position thereof;

    the alarm actuator being operable such that, when the side frame portions are in the operative position thereof to position the alarm actuator in contact with the bottom surface of the seat member, the alarm actuator senses whether an occupant seated on the seat member is raising his/her weight from the seat member;

    the alarm being operable to emit the warning signal responsive to the occupant raising his/her weight from the seat member as determined by the alarm actuator.

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