Cutter blade for motor-driven tool has bearing system which allows it to be mounted on eccentric shaft, producing oscillating movement, system comprising oval ring fitting into aperture in base of blade and held in place by friction

摘要

The cutter blade for a motor-driven tool has a bearing system which allows it to be mounted on an eccentric shaft, producing an oscillating movement. The bearing system comprises an oval ring (21) which fits into an aperture (16) in the base of the blade and is held in place by friction between its outer edge (22) and the inner surface (17) of the aperture.