A circular sawing machine comprises a base table, a main support link having one end swingably pivoted to the base table about a first pivotal point, a support arm pivoted to the main support link to be swingable about a second pivotal point formed to the other end of the main support link,...http://www.google.fr/patents/US5791224?utm_source=gb-gplus-shareBrevet US5791224 - Circular sawing machine
