I am pretty sure I wrote a post on this unique earthmoving attachment in the early Contract Journal days of the Digger Blog. However I think you will agree, it’s well worth another look. The Power Dozer system can be fitted to most size classes of bulldozer, and is said, by its manufacturers, to provide faster and more efficient earthmoving than any other conventional machine on the market.
It's a very clever piece of engineering, and I could see the benefits of this system when backfilling trenches on pipelines as shown in the video, but one would have to say surely a conventional angle tilt dozer would be just as effective?