Abstract: A mid-wheel drive power wheelchair is provide having a pair of drive wheels on the support frame below the seat. Castor wheels are positioned behind the drive wheels and rearward of the seat. A pair of anti-tip idler wheels are positioned forward of the drive wheels on opposite sides of the frame. The anti-tip wheels are normally positioned off the ground when the drive wheels and the castor wheels are in their normal ground-engaging position. The anti-tip wheels have a resilient mounting comprising a support arm attached at a rear end to the frame. The forward positioned anti-tip wheels are movable upwardly about the attachment of the support arm, with the suspension resiliently resisting such movement, in response to the engagement with a curb or obstruction or in response to a forward pitching of the chair about the drive wheels.

Abstract: A curb-climbing rear wheel drive power wheelchair is disclosed having a pair of drive wheels, at least one ground-engaging idler wheel connected to the frame forward of the drive wheels and at least one anti-tip wheel mounted above ground aft of the drive wheels. The drive wheels and anti-tip wheels are mounted on common suspension arms, pivoted to the frame of the wheelchair behind the drive wheels and resiliently suspended, so that the anti-tip wheels move up and down in response to movements of the drive wheel suspension.

Abstract: A motorized scooter is disclosed that comprises a steering shaft mounted for rotation about its axis. A tiller is connected to said steering shaft to rotate said steering shaft, and pivotable relative to said steering shaft. A pivot block is mounted on the free end of said steering shaft, a pair of forks on said tiller straddle the pivot block, and a pivot pin passes through the forks and the pivot block. The pivot block has a pair of lubricating plates of low-friction material on either side of it, so that the forks rest on said lubricating plates to tacilitate pivoting of said steering column. A strut of variable length is connected to the tiller and to said steering shaft so that pivoting of the tiller requires a change in the length of said strut. The strut comprises an inner shaft and an outer sleeve movable along said shaft to vary the length of said strut.

Abstract: A motorized scooter is disclosed that comprises a steering shaft mounted for rotation about its axis. A tiller is connected to said steering shaft to rotate said steering shaft, and pivotable relative to said steering shaft. A pivot block is mounted on the free end of said steering shaft, a pair of forks on said tiller straddle the pivot block, and a pivot pin passes through the forks and the pivot block. The pivot block has a pair of lubricating plates of low-friction material on either side of it, so that the forks rest on said lubricating plates, to facilitate pivoting of said steering column. A strut of variable length is connected to the tiller and to said steering shaft so that pivoting of the tiller requires a change in the length of said strut. The strut comprises an inner shaft and an outer sleeve movable along said shaft to vary the length of said strut.

Abstract: A mid-wheel drive power wheelchair is provide having a pair of drive wheels on the support frame below the seat. Castor wheels are positioned behind the drive wheels and rearward of the seat. A pair of anti-tip idler wheels are positioned forward of the drive wheels on opposite sides of the frame. The anti-tip wheels are normally positioned off the ground when the drive wheels and the castor wheels are in their normal ground-engaging position. The anti-tip wheels have a resilient mounting comprising a support arm attached at a rear end to the frame. The forward positioned anti-tip wheels are movable upwardly about the attachment of the support arm, with the suspension resiliently resisting such movement, in response to the engagement with a curb or obstruction or in response to a forward pitching of the chair about the drive wheels.

Abstract: A front wheel drive power wheel chair has the drive wheel axis of rotation forward of the wheelchair user's eyes and cranial center of perception.

Abstract: A power chair is provided comprising a frame transversely foldable between operating and transport positions. A seat is connected to the frame, with a pair of drive wheels also connected to the frame. The drive wheels are rotatable about a transverse axis below a portion of the seat supporting an occupant's thighs. The power chair further includes motors for driving respective drive wheels. Perspective motor/drive wheel combinations are pivotally connected to the frame. At least one ground-engaging idler wheel is connected to the frame, located rearward of the drive wheels. At least one anti-tip wheel is positioned above ground, forward of the drive wheels, and connected to the frame for movement relative to the frame upon encountering an obstacle.

Abstract: A power wheelchair has a frame, a seat connected to the frame, a pair of drive wheels connected to the frame and rotatable about transverse axis below a portion of the seat supporting the wheelchair occupant's thighs and at least one ground-engaging idler wheel connected to the frame behind the drive wheels.

Abstract: A curb-climbing front wheel drive power wheelchair has a frame, a seat connected to the frame, a pair of drive wheels connected to the frame and rotatable about a transverse axis below a portion of the seat supporting the wheelchair occupant's thighs. The power wheelchair also has at least one ground-engaging idler wheel connected to the frame behind the drive wheels and anti-tip wheels forward of the drive wheels, rigidly connected to the motors for pivotal movement.

Abstract: The lift chair has a base frame, an extendable/retractable chair occupant positioning apparatus attached to the base frame, a reversible D.C. motor for extension and retraction of the chair occupant positioning apparatus relative to the base frame. A control means is connected to the D.C. motor for actuation of the chair occupant positioning device. A power supply is connected to the control means for motor control. A chair occupant carriage is supported by the base frame. The carriage has a seat and a back portion.

Abstract: A front wheel drive power wheel chair has the drive wheel axis of rotation forward of the wheelchair user's eyes and cranial center of perception.