Patent ID: 8011357
Filing Date: 2011-09-06
Classification: B23D,B23Q,B24B,B28D

Abstract:
1. A cutting and dust collecting assembly, comprising: (a) a circular saw blade having a first side, a second side, a peripheral portion defining the working part of the saw blade, and a centre of rotation, (b) a blade guard extending over the saw blade around at least half of its circumference, a side wall of the blade guard on the second side of the blade covering or at least substantially extending around the centre of rotation of the blade, (c) a cover device which is elongated in a direction perpendicular to said centre of rotation, and has a first end defined as a front end with respect to a vertical plane which coincides with said centre of rotation, a second end defined as a rear end with respect to said vertical plane, a top member with a top surface, a base plate with a bottom surface extending in a plane at a distance from the top member, two elongated side walls facing one another, and a longitudinal passage for the saw blade, extending through the cover device from the top surface to the bottom surface in a region between the front and rear ends of the cover device, said top member, said base plate, and said side walls defining between them a space, including a front portion and a rear portion, said rear portion forming part of a terminal chamber, (d) the blade guard and the cover device being pivotally connected to one another via a hinge in or adjacent to a lower, rear corner of the blade guard, such that the saw blade can be moved upwards and downwards in said passage in the cover device through turning in said hinge, allowing a segment of the saw blade to be moved beyond the plane of the bottom surface of the cover device, down into a work object, during which movement said centre of rotation, which is positioned above the cover device, is displaced relative to the cover device, (e) a terminal member provided at the rear of said hinge, comprising said terminal chamber having an inlet port associated with the longitudinal passage of the bottom surface and an outlet port which can be connected to a vacuum source, and (f) the direction of rotation of the saw blade being such that the rear part of said segment which has passed beyond the bottom surface of the cover device will move in a direction upwards-rearwards towards the bottom surface, said direction being clock-wise when the saw blade is viewed in a direction towards the first side of the blade.