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The PreStride4, Model 9008, utilizes our new Stride4
stance control knee joints, which are comprised of a
four bar linkage mechanism and offer (3) modes of
operation: Stance control, free motion and locked
with stance phase flexion. An integral extension assist
spring housed within the midsection assists with knee
extension, while an adjustable extension stop allows
the clinician to adjust and fine tune the point at which
the joint enters into its stable/locked state. A button
on the Stride4 knee joint allows the clinician to switch
between stance control and locked modes of operation.
When the lock option is selected and engaged by the
clinician, the joint will allow approximately 3° of flexion
to provide some shock absorption to the patient.
An additional advantage of the PreStride is that it
may be used as an effective gait training tool during