| 摘要 |
PROBLEM TO BE SOLVED: To provide an impeller for a fluid pump composed on a plurality of parts which can be formed by a die and which can be easily assembled in a closed impeller. SOLUTION: Six blade piece parts 3 provided with a blade part 5 can be formed by a die. Engagement ribs 6d, 7d and engagement recess parts 6e, 7e formed on end parts of an upper plate part 6 and a lower plate part 7 of each blade piece part 3 are engaged to assemble annular impeller main body. A boss part 9 is formed on a lower surface 7f of the each blade piece part 3 downward. A base plate 2 and the impeller main body are fixed to complete a closed type impeller by engaging a constrict part 10 formed on the boss part 9 and an engagement hole part 12 of a gourd-shaped fixing hole 12 formed on a base plate. COPYRIGHT: (C)2005,JPO&NCIPI
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