Fluid reaction surfaces (i.e. – impellers) – Ambulant – body supported or with carrying handle
Reexamination Certificate
1999-04-09
2001-01-30
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Ambulant, body supported or with carrying handle
C416S14600A
Reexamination Certificate
active
06179564
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a portable electric fan, and more particularly, to a portable electric fan which can be hung on some part of one's body such as the neck so that a user can freely use two arms.
2. Description of the Related Art
In general, a user holds the portable electric fan with their hands and brings the electric fan near an object to be cooled. Accordingly, breeze comes from the electric fan.
FIG. 1
is a schematic exploded perspective view of a conventional portable electric fan.
Referring to
FIG. 1
, a first locking unit
3
such as a screw, is formed on an outer circumference of one end of a case
1
in the form of a hollow column. A motor
6
is installed inside the other end of the case
1
. The motor
6
includes a shaft
8
which protrudes to the outside through the middle of the end of the case. A fan
10
is installed on one end of the shaft
8
. The fan
10
is formed of a flexible material such as rubber. A cover
15
is installed on the outer circumference of the first locking unit
3
to be separable. In the cover
15
, a second locking unit
17
for locking onto the first locking unit
3
is formed on the inner circumference of a frame
16
in the form of a circular cup. An elastic member
18
for elastically biasing the battery
9
is installed on the inner surface of the bottom of the cover
15
. One or more batteries
9
are installed inside the case
1
between the motor
6
and the cover
15
.
The operation of the conventional portable electric fan having the above structure is as follows.
The cover
15
of the portable electric fan is rotated slightly in one direction with the portable electric fan in the hands. At this time, when an elastic member
18
pushes the battery
9
toward the motor
6
, the power of the battery
9
is transmitted to the motor
6
. It is possible to provide the power of the battery
9
to the motor
6
by operating a power source switch (not shown) instead of rotating the cover
15
. When the shaft
8
of the motor
6
rotates in one direction, the fan
10
rotates in one direction and air is moved from the rear of the fan
10
to the front of the fan creating a breeze. Therefore, a user who feels hot is cooled by the air which moves past and absorbs heat.
The conventional portable fan having the above structure is held by one or more hands when it is operated in order to cool the user. Therefore, it is difficult to freely use both hands when the user is cooled by the portable fan. Also, when the fan is formed of a hard material, a safety problem occurs during rotation. When the fan is formed of a flexible material such as rubber, the fan temporarily stops when it contacts the body. Accordingly, the movement of air stops and the function of cooling the user deteriorates.
SUMMARY OF THE INVENTION
To solve the above problem, it is an objective of the present invention to provide a portable electric fan which can be hung on some part of the body such as the neck of a user when the user is cooled and which is enclosed by a protecting member in order to allow the fan to rotate safely and to make the movement of air large.
Accordingly, to achieve the above objective, there is provided a portable electric fan, comprising a handle constructed of a case in the form of a hollow column, having one end through which one or more power supplying batteries are installed, a motor connected to the electrode of the battery for providing a rotational driving force, a fan which is installed on a rotating shaft of the motor and is rotatably driven, a protecting member enclosing the fan rotated by the motor, and a cord attached to some part of the protecting member.
REFERENCES:
patent: 5304035 (1994-04-01), Carter
patent: 5851106 (1998-12-01), Steiner et al.
patent: 94-3857 (1994-06-01), None
patent: 97-6232 (1997-07-01), None
Huang Jiawei
J.C. Patents
Look Edward K.
Rodriguez Hermes
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