Patent attributes
The present invention is an improved seat to be attached to standard wheelchairs and scooters with or without the original seat thereon. It further may be used as a standalone seat in regular chairs where additional assistance is needed to elevate and/or tilt the seat. In the preferred embodiment, a portable inflatable seat is positioned to the two seat rail tubes with brackets. Upon the top of a lower frame is stack mounted a plurality of box-like inflatable seat bags. An air pump unit with battery is removably attached to the back of the wheelchair. A control unit is also removably to the wheelchair and a control box is attached to the armrest and to the control unit. When turned on, the air pump unit will inflate the seat bags. The user will be elevated to a height of about 6 inches or so. As an additional feature, a tilt seat bag is attached to the top of the highest inflatable seat bag. Its inflation will cause the seat to tilt forward allowing the user to more easily dismount. In an alternative embodiment, a portable seat has a lower frame having four pivoted legs. Two legs are positioned on the front and rear of the frames. A horizontal arm connects the two front legs at the lower part thereof and has a pivoting and threaded drive nut. Another horizontal arm connects the two rear legs at the lower part thereof and has a pivoting and threaded drive nut, being oppositely threaded. A drive screw is mounted to both drive nuts and when rotated the legs are pushed apart in the front and rear direction to raise the seat thereon. The legs are slidably mounted in channels in the sidewalls of the lower frame. The upper part of each leg is pivotally mounted to an upper frame. The drive screw may be turned by hand or by an electric motor through a control unit having a control box mounted on the armrest. As an additional feature, a tilt seat section may be attached to the upper frame causing the seat to tilt forward allowing the user too more easily dismount. This feature may be activated when the seat is or is not elevated. The portable seat may also be used on scooters.
