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`PATENT ABSTRACTS OF JAPAN
`
`(43)Date of publication of application : 06.07.1982
`
`(11)Publication number :
`
`57-108496
`
`(51)Int.CI.
`
`F04D 29/34
`
`(21)Application number : 55-182145
`
`(71)Applicant : TOSHIBA CORP
`
`(22)Date of filing :
`
`24.12.1980
`
`(72)Inventor : OZEKI KENICHI
`AOYANAGI SEIICHIRO
`
`(54) IMPELLER ASSEMBLY DEVICE
`
`(57)Abstract:
`PURPOSE: To facilitate the assembly process and also secure safety of
`operation upon such a condition as inhibiting the use of captioned device
`under imperfectly assembled status in the assembly of an impeller
`inserted in and engaged with the rotating shaft, by inserting an elastic
`body between the both parts.
`CONSTITUTION: When a hand is removed from the fitting cylindrical
`portion 6 of the impeller 4 inserted around the rotary shaft 1 so that to
`release the inserting force from the impeller, the impeller 4 is pushed out
`of the rotary shaft 1, because the spring force A of the spring 11 in the
`fitting cylindrical portion 6 has been made larger than the frictional force
`B or the like between the rotary shaft and the ball 12, or between said
`shaft and the inner wall of the fitting cylinder 6. By this action,
`imperfectly inserted condition can be detected, to avoid the use under
`imperfectly assembled condition so that safety of operation may be
`secured. Then, the further inserting the impeller 4 into the rotary shaft 1,
`the ball body 12 fits in the joining groove 2 of the rotary shaft 1, and the
`engaging pin 3 engages with the fitting notch portion 7. When the hand is
`removed under this condition, the engagement force between ball 12 and
`joining groove 2 becomes greater by the spring force of the spring 11, and
`the impeller 4 can be easily attached to and held by the shaft 1.
`
`
`
`http://wwwl 9.ipdl.inpit.g0.j p/PA1/resu1t/detail/main/w4wyp7aDA3 57108496P1.htm
`
`2012/12/28
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