Abstract: An elevator drive cassette configured for use in driving the movement of an elevator car along a rail or rack, the elevator drive cassette including: a driven pinion and drive shaft configured to be driven by a drive motor associated with the elevator car; a mechanical coupling; at least one further pinion configured to be driven by the driven pinion or drive shaft via the mechanical coupling, wherein both the driven pinion and at least one further pinion are configured to engage the same rail or rack.

Abstract: A wheelchair has a base and a front anti-tip wheel assembly that retracts when impacted by an obstruction encountered by the wheelchair, but is maintained in an extended position when the wheelchair undergoes forward pitch. Also, the wheelchair has a swingaway light mounting system that includes a mounting receiver and a swinging light bracket mounting one or more lights. The swinging light bracket is mounted for rotation when impacted by an obstruction encountered by the wheelchair.

Abstract: A wheelchair has a base and a seat assembly, the base having drive wheels and caster wheels, the seat assembly being readily removable and replaceable to convert the wheelchair from a rear wheel drive configuration to a front wheel drive configuration, and from a front wheel drive configuration to a rear wheel drive configuration.