During typical wheelchair pushrim propulsion, significant forces must be applied by the wrist, arm and shoulder, despite the fact that they are not in optimum positions. Not surprisingly, pushrim wheelchair propulsion is associated with several common injuries. The most common are shoulder injuries… More

DESCRIPTION (provided by applicant): While the traditional wheelchair design, employing pushrims for propulsion, is simple and reliable, it is unfortunately inefficient and injurious. Research conducted at HERL has shown that only about half of the force being applied to the pushrim produces useful… More

DESCRIPTION (provided by applicant): While the traditional wheelchair design, employing pushrims for propulsion, is simple and reliable, it is unfortunately inefficient and injurious. Research conducted at HERL has shown that only about half of the force being applied to the pushrim produces useful… More

DESCRIPTION (provided by applicant): Despite many applicable developments in the field of ergonomically improved manual drive wheelchairs, the standard fixed pushrim remains the most prevalent method of propulsion. These ubiquitous fixed pushdm drives, while inexpensive and intuitively simple to… More

DESCRIPTION (provided by applicant): Despite many applicable developments in the field of ergonomically improved manual drive wheelchairs, the standard fixed pushrim remains the most prevalent method of propulsion. These ubiquitous fixed pushrim drives, while inexpensive and intuitively simple to… More

DESCRIPTION (provided by applicant): Current conventional manual standup wheelchairs have serious drawbacks: propulsion requires suboptimal arm ergonomics, they are biomechanically inefficient, and they only allow manual mobility in a sitting position. We propose the development of a manual… More

DESCRIPTION (provided by applicant): A Manual Standup Wheelchair Abstract Wheelchairs in the modern form have been around since at least 1760, when John Joseph Merlin invented pushrim propulsion. The Merlin Chair, as it was called, bears a remarkable rese mblance to wheelchairs today, despite the… More

DESCRIPTION (provided by applicant): Wheelchairs in the modern form have been around since at least 1760, when John Joseph Merlin invented pushrim propulsion. Manual wheelchairs are preferred by diagnosing physicians as the act of propulsion provides important cardiovascular exercise for the user.… More