Internal refrigerant gas circulation apparatus for a...

Details Internal refrigerant gas circulation apparatus for a... Internal refrigerant gas circulation apparatus for a...

2008-07-01

2008-07-01

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

With coolant air impelling means or finned cylinder surface

C418S055100, C418S151000

Reexamination Certificate

active

07393191

ABSTRACT:
In the case where a radial fan is provided on the upper end side of a rotor to provide an air circulating flow containing refrigerant gas so as not to hinder the flow of lubricating oil in a motor chamber, by which a motor is cooled, in order to reduce the cost of the radial fan, the radial fan is constructed by combining a plurality of blades (fan blades) (242) formed radially in the range of approximately 180° opposed to an upper balancer (270) so as to have a height smaller than the height of the upper balancer (270), and a fan cap (260) including a fan cover portion (262) covering the top faces of the blades (242) and an engagement portion (263) fixed to the upper end side of the rotor.

REFERENCES:
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patent: 5466134 (1995-11-01), Shaffer et al.
patent: 6746215 (2004-06-01), Tani et al.
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patent: 2003214372 (2003-07-01), None
patent: 2004143978 (2004-05-01), None

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