The new company has financial backing from the RAD BioMed Accelerator group and is in collaboration with the Ziv-Av Engineering group. They are initially designing these wheels for wheelchairs, city bicycles and aircraft landing gear but the company says the technology would be used for other wheeled vehicles.
Loopwheel springs are made from a carbon composite material, carefully developed and tested to give optimum compression and lateral stability as well as strength and durability. Specially-designed connectors attach the springs to the hub and rim. The three loops in each wheel work together as a self-correcting system. This spring system between the hub and the rim of the wheel provides suspension that constantly adjusts to uneven terrain – cushioning the rider from bumps and potholes in the road. In effect, the hub floats within the rim, adjusting constantly as shocks from an uneven road hit the rim of the wheel. The spring configuration allows the torque to be transferred smoothly between the hub and the rim.
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While entirely theoretical, Lee’s design is not without merit. Spokes and rims found on any standard bicycle already absorb shock, albeit minimally.
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Spring shock absorbing casters Wheel Material:PP core,PU wheels Size:Ø152 x 50mm ; Ø203 x 50mm Loading Capacity:260kg ~ 300kg Bearing Type: Double Ball Bearing
We’re growing rapidly now. We’ve got good distributors in important export markets. We plan to expand into our current market and to look at taking our technology into other areas. This could be for use in other vehicles including for lightweight electric vehicles in our congested cities.
"Rebecca was wonderful. Her personal and attentive customer care with regard to my purchase was quite outstanding and much appreciated."
That first grant helped us to develop our first loopwheel for wheelchairs. Getting the support from Innovate UK was crucial to us. We should have applied for R&D support earlier, it would have helped us to get a lot further a lot faster.
Cases to consider: 1: Idle - the spring should be able to carry the rider with no deflection, other wise if u lowered the spring from the beginning making the ground to hub distance smaller than the horizontal radius, you might experience lifting. but if it can support i believe its good
The arm may be broadened into a V shape with two pivots, either side by side or with the inner pivot slightly behind the front one - a semi-trailing arm. Trailing arms are usually found at the rear only. A trailing-arm suspension on a rear-wheel-drive car. The arm is attached to the rear wheel hub and broadens into a V whose two arms extend forward to pivot on the frame. The differential is fixed to the frame and the drive shafts have universal joints.
A robust cast-iron block restrains a forged-steel crankshaft with induction-hardened bearings, all engineered to withstand firing pressures of 1,595 psi—the equivalent of 20,000 pounds of force.
Originally Equipment for the Physically Challenged, EPC Wheelchairs Ltd was established in 1989 by Peter Norfolk OBE. We are a sucessful family-run business based in Perranporth, Cornwall & Farnborough, Hampshire. We are fortunate to be supported by loyal experienced, enthusiastic and knowledgeable team. We pride ourselves on sourcing good quality products at reasonable prices, and aim to supply our customers with friendly, expert knowledge and excellent service.
The University of Texas at Austin Center for Electromechanics (UT-CEM) has conducted a set of simulations and full-scale experiments to determine suitable shock load design requirements for in-hub (wheel) propulsion motors for hybrid and all-electric combat vehicles. The characterization of these design parameters is required due to recent advancements in suspension technology that have made it feasible to greatly increase the tempo of battle. These suspension technologies allow vehicles to traverse off-road terrains with large rms values at greater speeds. As a result, design improvements for survivability of in-hub motors must be considered. Defining the design requirements for the improved survivability of in-hub motors is the driving factor for this research.
You’ll notice your loopwheel has more movement, vertically and laterally. As soon as the springs are loaded, they compress and further change their concentricity. This is what gives you wheelchair comfort and shock absorption. A Loopwheel is designed to absorb shocks, reduce jolting and cushion your body against vibration. You’ll notice more sideways movement than with a spoked wheel, but you’re trading rigidity for greater comfort.
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