THE NITROGEN SHOCK ABSORBER
During the extensive five year development process, the rear strut, just above the castor, was originally a solid non adjustable component.
We found that as we reduced the length of it, the lower the user's centre of gravity became and the better the dynamic stability downhill Trouble was, the chair performed better uphill with a longer strut. Also as one of our testers remarked - he didn't want to sit at a resturant table, in a laid back position.
We really needed a strut that could be adjusted for length, perhaps telescopic and capable of being locked in the required position. But, what a pain to have to do that every time you wanted to go up or down steep hills. As our designer slumped back in his chair, he noticed that the chair had a shock absorbing feature and was height adjustable by depressing a small valve lever.
That was the magic moment.....
The chair was instantly dismantled, the specialist manufacturer contacted and 3 weeks later the solid rear strut was replaced by a position lockable shock absorber, custom made to TREKINETIC's specification.
The upshot is you can adjust the weight transfer or backrest angle without getting out of the chair! To recline backwards depress the valve and let your weight tilt the chair backwards*. To recline forwards, depress the valve and the compressed Nitrogen gas will lift it automatically.
It's a brilliant system, even if we say it ourselves, and the beneficiaries are TREKINETIC customers.
* Some users may have to apply additional effort or request assistance.