Electrically powered wheelchair

The HP330 is an electrically powered wheelchair designed to provide mobility to disabled or elderly persons limited to a seated position for indoor and outdoor use. It features a lightweight, compact design with a disassembled/assembled structure, electronically controlled rising seat with 280mm height adjustment, flip-down armrests, lead-acid battery power, and joystick control.

The proposed device uses a carbon steel frame (versus aluminum alloy in predicate), has six wheels including two anti-tip wheels (versus four in predicate), weighs maximum 136kg (versus 120kg), travels 12km on full charge (versus 16km), and has a turning radius of 825mm (versus 1200mm). Both use brushless DC motors, automatic electromagnetic brakes, joystick control, and direct rear-wheel drive. Performance metrics like max speed (5.4km/h forward, <2.5km/h backward) and braking distance (≤1.5m) are comparable.

ISO 7176 series (parts 1-15, 21-25) for wheelchair safety and performance; ISO 10993-5, 10993-10, and 10993-23 for biocompatibility; ISO 16840-10 for flame retardant testing; IEC 60601-1-2 for electromagnetic compatibility; and ISO 14971 for risk analysis.

Both devices share identical indications for use, same regulatory class (Class II), product code (ITI), and comply with the same ISO standards. The design principles for controller, driving system, and brake system are equivalent and meet identical ISO 7176-14 and 7176-3 requirements. Minor differences in frame material, wheel count, obstacle climbing (25mm vs 40mm), and loading capacity (136kg vs 120kg) do not raise new safety concerns because all stability and performance testing was conducted per ISO 7176 series standards, demonstrating these variations do not affect device safety or effectiveness.