Page 293 - Handbook of Electronic Assistive Technology

282 HANDBOOK OF ELECTRONIC ASSISTIVE TECHNOLOGY

(D)

(E)

FIGURE 9-3, cont’d (D) The gas strut in the climber forces the foot forward once the castor wheel ‘touches down’
and traction of the foot with the ground is released; momentum must be maintained to allow the rear wheels to
climb the kerb, otherwise they too may be stopped by the kerb� (E) Climb complete; kerb climber passively reset so
it is ready for the next obstacle�

FIGURE 9-4 Mid wheel drive�