FEATURE SPRINGS & SHOCK ABSORBERS
INTRODUCING THE InfiniSpring CONCEPT
S
teel grades are becoming increasingly stronger, and new possibilities have emerged for incorporating spring-like
behaviour into flat components. The InfiniSpring design therefore originated from a simple question: Could flexibility be built into the steel sheet structure itself? The goal was to develop a spring geometry
that combines high flexibility with strong load- bearing capacity, while also offering vibration and shock isolation – all within the structure itself. Manufactured from high-strength steel sheet using laser cutting technology, InfiniSpring is therefore an innovative type of patented steel spring.
A SOLUTION InfiniSpring can be integrated into a larger steel component or produced as a standalone spring. It is not intended to replace traditional coil springs or elastomers – which remain essential in many applications – but rather to offer an alternative solution for specific design challenges, especially where space, integration, or manufacturing simplicity are key considerations. It is designed to function in both compression
and tension, with its shape carefully optimised so that the looped sections distribute stress evenly, enabling: • High vertical flexibility • Strong load capacity • Protection against compressive overloads • Stress levels that remain below the steel’s yield limit. This balanced stress distribution
also contributes to enhanced fatigue resistance, making the design suitable for dynamic applications.
to embed spring functionality into existing structures. An example is a Plenum Fan, where InfiniSpring can be incorporated into the plinth parts to isolate vibrations and noise. By simply modifying the cut pattern of the existing steel part and using high-grade material, spring functionality is achieved without adding external components.
InfiniSpring originated from the question:
‘Could flexibility be built into a steel
sheet structure itself?’. Tero Lokasaari looks into its concept, design and the
opportunities it offers
InfiniSpring can be incorporated into the plinth parts of a Plenum Fan to isolate vibration and noise
VIBRATION AND NOISE ISOLATION
InfiniSpring is highly effective in both vibration and noise control. In suspended ceilings, traditional solutions often rely on springs or elastomers installed in compression. The InfiniSpring Acoustic Hanger was developed to function in tension, supporting the ceiling while providing excellent vibration and noise isolation. The hanger design includes several
integrated features: • A movement limiter to protect against overloads
• A tight-fit bottom for secure installation into ceiling profiles
• A cable routing hole • A riveting hole and Nonius connection for ceiling mounting.
Acoustic hanger
Spring finite element model showing compressive stresses
MULTI-DIRECTIONAL FLEXIBILITY
In addition to vertical movement, InfiniSpring provides flexibility in both transversal and longitudinal directions, offering effective isolation in all axes. In these directions, the spring can typically handle around 40% of the vertical load. Furthermore, because thin structures are often
sensitive to buckling, InfiniSpring’s compact design – with closely positioned upper and lower connection points – helps maintain structural stability. Maximum deflection is approximately equal to the sheet thickness in any direction. InfiniSpring can be integrated directly into sheet metal components, allowing designers
46 DESIGN SOLUTIONS JULY/AUGUST 2025
CUSTOMISATION InfiniSpring can also be welded to structures. For example, in a DN300 pipe slide application, while most of the standard SFS 5377 components were retained, the vertical U-profiles were replaced with InfiniSpring- springs. This resulted in a more resilient connection that reduces structure-borne noise. InfiniSpring is available in standard thicknesses from 3-12mm, with stiffness and load capacity increasing with size. The spring shape can be easily modified in CAD software to meet specific performance requirements or to integrate additional functions such as movement limiters, mounting features, and custom stiffness profiles. The springs are selected based on the total mass of the device or supported structure.
MANUFACTURING AND LICENSING InfiniSpring is either available as finished spring products, or through a low-cost licensing model, enabling companies to manufacture the springs locally using laser cutting either in- house or through subcontractors. It is not a replacement for traditional coil springs or elastomers, but a complementary innovation, offering new design flexibility where integration, space efficiency, or simplified manufacturing are priorities.
InfiniSpring
https://infinispring.com/
Suspended ceiling with InfiniSpring Acoustic Hangers
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