Ventilation – Having outlet airway – With air pump
Reexamination Certificate
2001-09-06
2002-08-20
Joyce, Harold (Department: 3749)
Ventilation
Having outlet airway
With air pump
C454S354000, C454S355000
Reexamination Certificate
active
06435964
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates a ventilation fan and, more particularly, to a bathroom ventilation fan, which has a compact size and, facilitates the performance of repair and maintenance work.
FIGS. 1 and 2
show a bathroom ventilation fan according to the prior art. This structure of bathroom ventilation fan comprises a housing
1
′, a fan motor
2
′, and a centrifugal fan
3
′. The housing
1
′ has a wind box
11
′, and a rack
12
′ provided inside the wind box
11
′. The fan motor
2
′ and the centrifugal fan
3
′ are mounted inside the wind box
11
′. During a repair work, the rack
12
′ must be removed from the housing
1
′ at first, enabling the fan motor
2
′ to be exposed to the outside. Because the rack
12
′ is fastened to the inside of the housing
1
′ with multiple screws, it takes much time to remove the rack
12
′ from the housing
1
′. Further, because the motor
2
′ and the centrifugal fan
3
′ are disposed at the same side inside the wind box
11
′, the wind box
11
′ must have sufficient space to hold the motor
2
′ and the centrifugal fan
3
′. Due to this reason, this design of ventilation fan is heavy and bulky.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention has been accomplished to provide a ventilation fan, which eliminates the aforesaid drawbacks. It is one object of the present invention to provide a ventilation fan, which has a compact structure. It is another object of the present invention to provide a ventilation fan, which facilitates the performance of repair and maintenance work. According to one aspect of the present invention, the ventilation fan comprises a case-like frame having an opening and a rib in the opening, a motor fastened to the rib inside the case-like frame, a face cover detachably covered on the case-like frame, the face cover having air inlets in communication with the opening of the case-like frame, a centrifugal fan fastened to the motor shaft of the motor and disposed outside the case-like frame, and a wind box detachably covered on the outside of the case-like frame over the centrifugal fan. According to another aspect of the present invention, the wind box is fastened to the case-like frame by a hooked joint.
REFERENCES:
patent: 3305163 (1967-02-01), Sheppard
patent: 52-11639 (1977-01-01), None
patent: 59-197745 (1984-11-01), None
patent: 6-147582 (1994-05-01), None
Enlight Corporation
Joyce Harold
Troxell Law Office PLLC
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