Innovation

Vibration Reduction System
Now that Sears are in a position to solve most vertical isolation concerns, the next step is to reduce horizontal and lateral vibrations. Being the first to introduce horizontal and lateral isolation, Sears have applied the same technological vertical suspension know how, to improving lateral and horizontal isolation. October 2003 saw the production introduction of 'Dead End Damping' (DED®) technology which can significantly reduce horizontal and lateral vibrations. Plus it has the added advantage of achieving this isolation improvement, with out the need for disproportionate increases in the required seat envelope, typicality associated with the reduction in this type of vibration.

The Success of the John Deere Active® Seat has led Sears to introduce an innovative and advanced all new suspension range including Semi-Active and Active'Vibration Reduction System'(VRS®) versions, which can reduce the frequency rating of our suspensions to less than 0.5Hz. For the operator, this means improved comfort, ride performance, productivity and operator well being. These seats can even help meet and exceed the new Physical Agents Directive (PAD) legislation due for introduction from 2007 within the European Union.

What you gain
Sears VRS® SEMI-ACTIVE COMPUTER CONTROLLED suspensions for optimum ride performance
in the replacement seat market. 15 years of low frequency development have made Sears the world leader in advanced suspensions and has enabled Sears to produce this suspension that can operate below 0.75 Hz. Cutting vibration transfer by over 40%, the system is designed to absorb virtually all rough vertical jolts and vibrations, it can significantly improve operator comfort and productivity.
Field studies by leading manufactures have proven that the vehicle can by driven safely up to 15% faster across the ground greatly improving productivity. This suspension can also help to meet the Physical Agents Directive (EU introduction from 2007).

How does the VRS® work? As the vehicle moves across the terrain the position sensor provides the computer with real time changes in surface conditions 500 times per second. The computer instantly interprets the conditions selecting the appropriate ride algorithm. The program then sends an electric pulse(changing the strength of the magnetic field), to the MR fluid filled Semi- Active damper changing the fluids viscosity instantly. The ride firmness selector manually selects the damping force overriding, (when required) the automatically selected ride profile, enabling the seat to meet all operator ride tastes.