| 摘要 |
PROBLEM TO BE SOLVED: To provide an efficient small sized flat pump device easy to seal a gap between cases, improving assembly efficiency, having high productivity and providing reliable sealing, and a method for assembling cases thereof. SOLUTION: This pump device includes a trochoid gear 25 welding a gear case 32 and a nearing case 31, and the bearing case 31 and a motor case 30 by near infrared laser. COPYRIGHT: (C)2007,JPO&INPIT
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