Fluid reaction surfaces (i.e. – impellers) – Support mounting – carrier or fairing structure – Selectively adjustable impeller mount
Reexamination Certificate
1999-08-30
2001-02-06
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Support mounting, carrier or fairing structure
Selectively adjustable impeller mount
C416S24400R
Reexamination Certificate
active
06183204
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to electric fans for home use, and more particularly to such an electric fan that can be alternatively arranged into a desk fan, or a floor fan as desired.
Regular electric fans for home use commonly include two types, namely, the floor fans and the desk fans. A desk fan, as shown in
FIG. 1A
, is generally comprised of a fan assembly
10
, and a stand
20
. A floor fan, as shown in
FIG. 1B
, is generally comprised of a fan assembly
10
, a stand
20
, and a retractable stem
30
connected between the fan assembly
10
and the stand
20
. A desk fan is compact and portable, and designed for use on the top of a table or the like, however it is not suitable for use in the living room or lobby, or a spacious floor space. A floor fan is heavy and not portable, however it is suitable for use in a spacious space. Because these two types of electric fans are designed for different purposes, it is expensive to prepare two different types electric fans. Because the stands for desk fans and the stands for floor fans are not compatible, the inventory control in factory is complicated.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an electric fan, which can be alternatively arranged into a desk fan, or a floor fan as desired. According to the present invention, the electric fan comprises a saucer-like base for positioning on a flat surface, a floor fan connector for fastening to the base, a fan assembly, the fan assembly having a downwardly extended bottom coupling tube and a peg raised from the periphery of the bottom coupling tube, a stem for connection between the fan assembly and the floor fan connector, enabling the fan assembly and the base to be assembled into a floor fan, a lock screw for threading into a screw hole at the peg of the bottom coupling tube to secure the fan assembly to the stem, a lock nut for threading onto an outer thread at the stem to secure the stem to the floor fan connector and the base, and a desk fan connector for fastening the bottom coupling tube of the fan assembly to the base, enabling the fan assembly and the base to be assembled into a desk fan.
REFERENCES:
patent: 5403162 (1995-04-01), Chen
patent: 5411373 (1995-05-01), Chiu et al.
patent: 6015262 (2000-01-01), Huang
Accutek Products Corp.
Casey, Esq. Donald C.
Look Edward K.
Nguyen Ninh
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