This incident occured in (b)(6) involving a product manufactured by (b)(4) in (b)(6).(b)(4) is filing this report because the device is marketed and sold in the u.S.(b)(4) analyzed the device and we make the justified assumption that the wheels/handrims have been damaged by external forces (repeatedly driven against obstacles or improper securing during transport).As a result mechanical parts were severely deformed causing a non valid continuos signal from the push rim (longer than one wheel rotation) which triggered an intended fault safety function of the device to interrupt the electrical support, which was considered as a block of the device by the end customer.
Event Description
The end user reported that the e-motion wheel suddenly blocked on a slight slope, causing the end user to fall out of the chair causing fracture of the lower legs with the need of a hospitalization and recovery in an orthopedic clinic.The end customer informed (b)(4) that he had noticed some time before the incident occured that the e-motion wheels reacted sporadically and that he had planned to send the product in for inspection/repair, which was not possible due to personal circumstances.