Gas laser apparatus
AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorsHakaru Mizoguchi, Junichi Fujimoto, Yoshiho Amada
Life of this patent
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Abstract
A gas laser apparatus in which a gas medium in a case and a lubricant for bearings supporting a blower for circulating the gas medium are isolated from each other, so that the lubricant can be prevented from mixing into the gas medium while no substantially large resistance is applied to the blower drive. To isolate the gas medium and the lubricant, magnetic fluid shaft seals (10, 11) are used for sealing between the lubricant for the bearings (6) for supporting rotation shafts (3a, 3b) of the blower (3) and the gas medium in the case (1).
Claims18
A gas laser apparatus comprising:
- a gas medium;
- a case in which the gas medium is enclosed;
- a blower for circulating the gas medium within said case, said blower having a rotation shaft;
- a bearing supporting said rotation shaft, said bearing containing a lubricant;
- an anode and a cathode positioned in said case for generating laser light;
- and
- a magnetic fluid shaft seal positioned about said rotation shaft and providing a seal between the gas medium in said case and said lubricant in said bearing so as to isolate said lubricant from said gas medium.
A gas laser apparatus comprising a case having a chamber for containing a gas medium, an anode and a cathode positioned in said chamber for generating laser light, a blower associated with said case for circulating a gas medium in said chamber, said blower being mounted on a shaft, at least one bearing for supporting said shaft, each said bearing containing a lubricant for the respective bearing, and at least one magnetic fluid shaft seal associated with each said bearing to isolate the lubricant in the respective bearing from the gas medium in said chamber.
Dependencies are inferred from the claim text.