Leveraged Freedom Chair

Target SDGs

Market Suggested Retail Price

$250.00

Target Users (Target Impact Group)

Small and Medium-sized Enterprises, Public Sector Agencies, NGOs

Distributors / Implementing Organizations

GRIT distributes the LFC via partners organizations, such as NGOs, government health units, hospitals, and others.

Competitive Landscape

Direct competitors include Motivation Rough Terrain Wheelchair, GEN_1 Design Wheelchair, and Rough Rider Wheelchair.

Manufacturing/Building Method

LFC kits are centrally manufactured and then distributed for local assembly through partner networks.

Intellectural Property Type

Patent

User Provision Model

The LFC is sold in bulk (quantities of 100+) to NGOs, governments, and aid agencies serving the disabled in developing countries.

Distributions to Date Status

Over 1,500 LFCs have been distributed worldwide through partner organizations in 17 countries.

Design Specifications

Components: - - Rigid mild-steel frame - - Three wheels - - Adjustable rear axle position - - 26 inch pneumatic bicycle tires - - 8 inch solid rubber front castors - - Adjustable footrest with straps - - Fixed armrest with mudguard - - Comfort cushion - - Seatbelt - - Chest and foot straps - - Bicycle ball bearings on all bearing surfaces - - Storable lever drivetrain and pushrims - - Variable mechanical advantage from 1:1 to 3:1. Measurements (standard size): - - Seat depth: 14 inches - - Length: 44 inches - - Width: 26 inches - - Seat width: 15 inches - - Weight: 51 pounds.  

Product Schematics

Technical Support

LFCs must be properly prescribed for individual users. This requires support from local distribution partners, who ensure the LFC is correctly sized and appropriate for its user.

Replacement Components

LFC is built from bicycle parts that are widely available around the world. LFC owners have reported using local bicycle shops to repair punctures, change bearings, and tune up their chairs.

Lifecycle

LFC is designed to be easily repairable across the world to promote repairs rather than replacement.

Manufacturer Specified Performance Parameters

Able to travel 5km/day on variable terrain; small and maneuverable enough to be used indoors; locally repairable using local tools, parts, and knowledge; provides good posture support.

Vetted Performance Status

Field tests show that compared to a conventional wheelchair on a dirt road, the LFC is about 78% faster, 41% more efficient in terms of metabolic effort, and able to put out 51% more torque.

Safety

A wheelchair that is not properly fit to the needs of an individual user can result in discomfort or injury (such as scoliosis or pressure sores) due to insufficient support or improper cushioning. There is also a risk of tipping while using a wheelchair.

Complementary Technical Systems

N/A

Academic Research and References

Compliance with regulations

ISO International Standards for Wheelchairs, International Organization for Standardization.

Evaluation methods

Biomechanical Testing (field testing) Static, Impact, and Fatigue strength testing using a 200,000 cycle double-drum test (lab testing)

Other Information

Empowering People Award winner