Individuals experiencing diminished leg strength often encounter difﬁculty performing the transition from a sitting to a standing position. An adult will complete an average of sixty transitions per day, making it one of the most physically demanding tasks performed in day-to-day life. The elderly population of the USA increased by 7% in ﬁfty years, and thus the number of persons lacking the ability to successfully complete the Sit to Stand Transition (STST) has also been increasing. This project designed a portable mechanism that can be mounted on an individual’s leg to provide an assistive knee extension moment during the STST. The ﬁnal design is a spring-driven ratchet and cam system that stores the potential energy expended during sitting for usage during the STST.
Worcester Polytechnic Institute
Major Qualifying Project
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