Patent ID: 7628102
Filing Date: 2009-12-08
Classification: B23D,B23Q,Y10T

Abstract:
1. A circular saw, comprising: a blade that cuts a workpiece, a blade case that covers the blade, a motor that drives the blade, a cooling fan that generates a cooling air to cool the motor, a dust case provided adjacent to the blade case, the dust case having an outer surface and an inner surface that define a dust collecting chamber that collects chips generated during a cutting operation by the blade, a dust case cover that covers at least part of the outer surface of the dust case, and an air space substantially free of chips generated during the cutting operation, separate and distinct from the dust collecting chamber and the blade case, formed between the dust case cover and the outer surface of the dust case, wherein the cooling air generated by the cooling fan is directly introduced into the air space so as to form a cooling air flowpath separate from a dust flowpath, wherein the air space and the dust case are provided on a first side of the blade, and wherein the cooling fan and the motor are provided on a second side of the blade opposite the first side.