Anil Thank you for your feedback. To address your concerns, specially from the balance part, the legs of the elwalker are sure to be balanced and strong when it is to be applied. In the models I've constructed for testing, it proved to be quite supportive and balanced.
In terms of control, a great percentage of the elderly have weak muscles and arthritis in their hands and arms. And by having the elwalker supporting them from their waist, you eliminate the uncertainty of their arm usage. The elwalker also would have stoppers in case of toppling. The legs cover a distance in the front and back, as well as sides to make sure that falls in any direction are prevented, and complete support is provided. Other devices are external to the body, and therefore can easily escape the grip and offer no help at all when in need.
Anne-Laure Fayard Hello! This is Lama. I'm glad you like the idea. It is a little different from the exoskeleton as it targets the elderly with mobility problems (Such as walking for long distances, getting up from chairs, climbing and descending stairs, etc). And you don't need to use crutches, as it stabilizes people from their center of gravity (leaving arms free for use). The idea can have a simple application without complicated electronics, just basic mechanics to make it affordable and allow for easy customization.