Engineering Mobility. Expanding Possibility.
Affordable prosthetic engineering designed to make advanced mobility more accessible.
A passive prosthetic knee engineered for stability, energy-efficient movement, and affordability.
Advanced mobility should not be limited by cost.
Understanding the clinical and socio-economic realities faced by above-knee amputees across India.
Above-knee amputees in India frequently face prohibitive costs for imported prosthetic knee joints, paired with restricted access to specialized, long-term prosthetic maintenance.
Traditional high-performance prosthetic knees available on the market are predominantly imported from multinational manufacturers. These systems carry price tags in the lakhs of rupees, rely heavily on electronic battery charging, and demand specialized calibration tools unavailable in rural or semi-urban clinical centres.
When imported knees break down, replacement parts can take months to procure, forcing patients to revert to crude, immobile crutches. STEGNCE LYF TEK was founded to solve this critical disparity through robust mechanical engineering rooted in domestic innovation.
Imported microprocessor and multi-axis knees typically retail between ₹2,00,000 and ₹20,00,000, placing them beyond the reach of most Indian families.
Sthirā operates completely passively without charging ports, batteries, or electrical outlets, perfectly suited for Indian rural infrastructure.
A substantial above-knee amputee demographic awaits dependable, low-maintenance prosthetic solutions capable of handling diverse terrains.
Meet Sthirā.
Engineered for stability. Designed for accessibility. A passive prosthetic knee joint for above-knee and transfemoral prostheses.
Affordable
Pioneering indigenous manufacturing and streamlined mechanical design to dramatically reduce unit acquisition and lifelong ownership costs for Indian amputees.
Lightweight
Optimized structural geometry and high-grade materials minimize distal prosthetic weight, reducing user fatigue and metabolic energy consumption during daily ambulation.
Reliable
Sealed passive pneumatic resistance mechanism delivers consistent cadence control and reliable stance stability without electronic failure points or charging dependencies.
Precision At Every Axis
Interact with the verified structural and kinematic assemblies of Sthirā Knee.
Universal 4-prong stainless steel male pyramid connector ensuring universal compatibility with standard prosthetic sockets and alignment adapters.
Multi-axis kinematic linkage with heavy-duty pivot bolt providing natural geometric swing clearance and dependable mechanical stance stability.
Sealed pneumatic damping unit with micro-polished piston rod modulating air compression to produce smooth, velocity-dependent swing cadence without batteries.
High-strength CNC-milled aluminium alloy frame with weight-reduction cutouts, engineered to withstand high axial loads while minimizing distal limb mass.
Integrated 30mm pylon tube clamp with dual high-tensile locking bolts and internal mechanical spring adjustment dial for rapid resistance tuning.
Restoring Natural, Uninterrupted Living
- ✓ Zero Battery Anxiety: Completely passive. No chargers, cables, or dead-battery risks on long journeys.
- ✓ Smooth, Non-Jarring Gait: Air damping cushions heel strike and delivers a natural pendulum swing.
- ✓ True Domestic Affordability: Target range ₹15,000 – ₹50,000 vs lakhs for foreign imports.
- ✓ Daily Flexibility: Deep angular flex for comfortable seating in chairs, autos, and buses.
Clinical Excellence & Scalable Delivery
- ✓ Universal Modular Standard: Standard 4-prong male pyramid fits any standard prosthetic socket and pylon.
- ✓ Zero Software Calibration: Fast mechanical adjustment screw allows tuning in minutes without laptops or dongles.
- ✓ Rugged Environmental Tolerance: Sealed pneumatic chamber engineered to withstand Indian heat, dust, and rain.
- ✓ High-Impact Camp Economics: NGOs and CSR funds can fit 5x–10x more amputees per budget allocation.
Sthirā in Motion
Observe how the passive pneumatic damping responds dynamically to natural human cadence during swing, stance, sitting, and incline transitions.
Why Sthirā?
Evaluating Sthirā Knee against conventional imported prosthetic options in the Indian context.
| Evaluation Metric | Sthirā Knee (STEGNCE) | Imported Alternatives |
|---|---|---|
| Affordability | ₹15,000 – ₹50,000 (Target range) | ₹2,00,000 – ₹20,00,000 |
| Battery Requirement | Zero battery required (100% Passive) | Often battery-dependent (Requires regular charging) |
| Maintenance & Servicing | Low maintenance, rugged mechanical seals | High maintenance, specialized diagnostic tools required |
| Rural Usability | Excellent (Tolerant of dust, dirt & uneven terrain) | Limited (Delicate electronic sensors & sensitive ports) |
| Service & Spare Parts Support | Local domestic support (Quick turnaround) | Imported support (High shipping costs, extended delays) |
Designed for everyday movement.
Engineered to restore natural kinetic flow across the functional movements of daily life.
Sitting
Provides smooth, generous flexion angles to allow comfortable seating in chairs, vehicles, and standard domestic furniture without awkward limb protrusion.
Walking
Natural pendulum dynamics synchronize with the user's forward momentum, smoothing terminal impact and lowering the metabolic expenditure of steady gait.
Cycling
Continuous rotational clearance facilitates continuous pedaling action, expanding opportunities for active recreation, daily commuting, and rural transport.
Bending / Stairs
Predictable mechanical resistance provides stability when descending ramps, managing kerbs, or negotiating uneven outdoor steps with confidence.
Simple mechanics. Thoughtful engineering.
Sthirā Knee uses a pneumatic cylinder combined with spring-adjustable resistance to control movement seamlessly through the human gait cycle.
Integrated Prosthetic Architecture
Sthirā operates seamlessly within standard prosthetic fitting systems, serving as the critical dynamic bridge between socket and foot.
SOCKET
Custom-molded residual limb interface transferring user muscular effort into the prosthesis.
PYLON
Structural intermediate tubing calibrating vertical limb alignment and patient height.
STHIRĀ KNEE
Central passive pneumatic control unit providing stance stability and smooth swing dampening.
FOOT
Articulated or energy-storing ground contact terminal establishing ground reaction compliance.
Performance & Validation
STEGNCE LYF TEK follows a structured, medically compliant pathway toward clinical readiness and regulatory certification.
Prototype
CompletedKinematic design, CAD modeling, and initial functional bench prototypes established.
Mechanical Validation
ActiveStress simulation, cyclic load testing, and pneumatic sealing integrity assessments.
Patient Evaluations
ActiveStructured observational trials with above-knee amputees under clinical supervision.
Regulatory Process
In ProgressSubmissions for ISO 13485:2016 quality systems and CDSCO classification.
Commercial Readiness
Target: 2026Scaled domestic assembly, hospital distribution, and rehabilitation network onboarding.
Built for the people and systems that deliver mobility.
Sthirā Knee is engineered to integrate across public, private, and non-profit rehabilitation infrastructures.
Government Hospitals
Supplying state and district medical colleges with robust, cost-effective prostheses for high-volume amputee rehabilitation departments.
Rehabilitation Centres
Providing prosthetists and physiotherapists with an intuitive, easily calibrated knee joint to accelerate patient gait re-education.
Prosthetic Clinics
Enabling private P&O professionals to offer a dependable, high-performance alternative to cost-conscious amputee patients.
NGOs & Charitable Trusts
Maximizing the impact of philanthropic limb donation camps through affordable unit pricing without sacrificing kinetic quality.
Above-Knee Amputees
Restoring independence, vocational capacity, and dignified mobility to individuals overcoming transfemoral limb loss.
Government Welfare Programs
Aligned with public assistance schemes designed to democratize high-grade assistive devices across diverse socioeconomic strata.
Potential Distribution Channels
STEGNCE LYF TEK envisions a multi-layered deployment framework across public health programs, institutional bodies, and grassroots clinical networks in India.
Go-To-Market Ecosystem
An integrated engineering ecosystem bridging precision manufacturing with continuous clinical follow-up.
Direct Sales
Direct engagement with certified prosthetic workshops and clinics to ensure authentic fitting and technical support.
Clinical Partnerships
Collaborating with premier medical institutions and rehabilitation faculties for continuous clinical feedback.
Government Procurement
Participating in state welfare procurement and assistive device empanelment to scale access across India.
NGO Network
Partnering with humanitarian organizations to reach rural, economically disadvantaged amputees through structured camps.
Strategic Partners & Support
Institutional expertise and mission-aligned support advancing accessible medical device innovation.
Funding Support
Bumeric India Foundation
Supported by Bumeric India Foundation, advancing indigenous medical engineering aimed at social impact and accessibility.
University Development
VIT-AP University
Developed at VIT-AP University, leveraging advanced laboratory infrastructure, multidisciplinary engineering faculties, and prototyping workshops.
Hope Meets Engineering.
STEGNCE LYF TEK PRIVATE LIMITED was founded to engineer accessible, high-performance mobility hardware for above-knee amputees.
Positioned at the intersection of clinical insight, mechanical engineering, and rehabilitation science, STEGNCE LYF TEK bridges the vast gap between high-cost foreign prosthetics and basic manual mobility aids. By developing indigenous passive-mechanical innovations starting with Sthirā Knee, the company empowers amputees with the freedom to walk with dignity, stability, and confidence.
Looking Ahead: Pediatric Mobility
Extending adaptive prosthetic engineering to growing children with congenital or traumatic limb loss.
GROWSTEP
A specialised pediatric prosthetic limb featuring a height-adjustable telescopic pylon integrated with a passive articulated ankle-foot assembly. Designed specifically to accommodate the physical growth stages of young children without requiring frequent, cost-prohibitive full prosthesis replacements.
Safety, Quality & Compliance
STEGNCE LYF TEK is committed to transparent regulatory filings and rigorous manufacturing standards.
ISO 13485:2016
Standard for Medical Devices Quality Management Systems, ensuring controlled design and traceability.
CDSCO (India)
Central Drugs Standard Control Organisation regulatory dossier for medical device registration.
UDYAM Registration
UDYAM-AP-04-0130113 — Officially registered micro, small and medium enterprise under Government of India.
DPIIT Recognition
DPIIT252862 — Recognized startup by the Department for Promotion of Industry and Internal Trade.
GST Registration
Compliant corporate taxation and commercial business registration under Indian taxation laws.
Let's build the future of mobility — together.
Connect with STEGNCE LYF TEK to learn more about Sthirā Knee, partnerships, clinical evaluations, and distribution opportunities.
Amaravati, Andhra Pradesh 522237, India