Dear Paul and Jim I see that http://www.google.com/patents?id=HcssAAAAEBAJ&printsec=abstract&zoom=4&dq=44 31039#v=onepage&q&f=false is for a spiral cutter that has continuous feed, not episodic like the video with the tractor driven one. The difference is that the blade is curved in towards the centre, not mounted along periphery of the disk.
I mention this detail Paul, because there is no need to have a feeder if the blades draw in the wood automatically (by having 'a plurality of blades'). If you are not clear on how to make that work give me a phone call. I also see the patent has expired. That may simplify things for small producers. The older teardrop chopper https://files.pbworks.com/download/kQCWabldTc/gekgasifier/7422357/teardropch unker.pdf rotates much faster and from the look of it, has a higher system efficiency - a lot less friction. Given the fact that the spirals need very much larger bearings than the teardrop cutter you might look at the USDA paper even if you are already convinced about the spirals. The more common/classic chopper requiring a heavy flywheel with a blade mounted in it can be seen at https://files.pbworks.com/download/oCvnoxacAq/gekgasifier/6124501/JENSENCHOP PER.pdf which is I think what is being avoided with the spiral. Great collection of references! Regards Crispin [all else snipped] _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
