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Blower used for laser oscillator










Image Number 5 for United States Patent #7342948.

In an laser oscillator (100), a blower (10, 20, 120) for circulating a laser medium between an electric discharge tube (102) and a circulating passage (104) includes: a casing (12) having a suction port (12a) and an exhaust port (12b); and a blade (18) pivotally supported in the casing (12) so that the blade (18) can face the suction port (12a) and the exhaust port (12b). The blade (18) is formed into a shape in which a diameter of the blade (18) is different at a position on a cross section perpendicular to a rotary central line (O), and a gap (G.sub.o) between a portion, in which a diameter of the blade (18) is relatively large, and the casing is larger than a gap (G.sub.i) between a portion, in which a diameter of the blade (18) is relatively small, and the casing. Due to the foregoing, a highly reliable blower used for a laser oscillator, the reduction of the blower efficiency of which is suppressed to be as small as possible, can be provided.








 
 
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