Section 890.3825 - Mechanical walker(a)Identification. A mechanical walker is a four-legged device with a metal frame intended for medical purposes to provide moderate weight support while walking. It is used by disabled persons who lack strength, good balance, or endurance.(b)Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter, subject to the limitations in § 890.9 . The device is also exempt from the current good manufacturing practice requirements of the quality system regulation in part 820 of this chapter, with the exception of § 820.180 , regarding general requirements concerning records and § 820.198 , regarding complaint files.48 FR 53047, Nov. 23, 1983, as amended at 66 FR 38817 , July 25, 2001