Just read the article and the pictures I agree look unsafe for the caregiver to take these positions. We do not teach these methods of moving patients from sitting to standing. But I would need to actually view this special chair to give an honest opinion.
We use slide sheets and special moves around the hips and legs to help move patients to the front of the chair. Then 2 caregivers would assist to patient to stand according to the NZ 2012 Guidelines by crossing arms over the patients back and the other hand on the patients front chest.