Fan having conical impeller cup

Details Fan having conical impeller cup Fan having conical impeller cup

2007-09-12

2011-10-04

Freay, Charles (Department: 3746)

Pumps

Motor driven

Motor within rotary pumping member

C415S219100, C416S24400R

Reexamination Certificate

active

08029251

ABSTRACT:
A fan for generating an air flow by rotating an impeller with a motor is provided. A cylindrical outer side surface of a rotor of the motor is press-fitted to an inner side surface of the impeller cup which is substantially cylindrical. An outer side surface of the impeller cup is a portion of a circular conical surface, thereby increasing the amount of air generated and transmitted by the fan. A gap is formed between the outer side surface and the inner cylindrical surface of the impeller cup. The cylindrical outer side surface of the rotor is connected to the inside of the inner cylindrical surface of the impeller cup coaxially with each other. Thus, the impeller and the rotor can be reliably fixed to each other with improved performance of transmitting air.

REFERENCES:
patent: 4832576 (1989-05-01), Deguchi et al.
patent: 5695318 (1997-12-01), Harmsen
patent: 6997678 (2006-02-01), Sun
patent: 7112906 (2006-09-01), Chou et al.
patent: 2006/0280623 (2006-12-01), Yu et al.
patent: 10-108435 (1998-04-01), None
patent: 2000-352397 (2000-12-01), None
patent: 2001-065497 (2001-03-01), None
patent: 2002-171716 (2002-06-01), None
patent: 2004-116291 (2004-04-01), None

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