Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Adjustable
Reexamination Certificate
1999-11-15
2001-06-26
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Adjustable
C416S21000A, C416S24400R
Reexamination Certificate
active
06250884
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a ceiling fan, more particularly to a ceiling fan with a casing body for shielding a motor and engaging a plurality of fan blades.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional ceiling fan
1
is shown to include a motor
10
, and a motor casing
20
including upper and lower casing halves
22
,
23
which are interconnected by a connecting member
21
. The upper casing half
22
has a central hole
221
for passage of a connecting shaft
11
of the motor
10
. The lower casing half
23
has an opening
231
for passage of a bottom portion of a motor
10
such that a plurality of blade connecting arms
30
are secured threadedly on the bottom portion of the motor
10
.
The assembly process for the conventional ceiling fan
1
is relatively complicated because it includes threaded engaging operations between the lower casing half
23
and the connecting member
21
, between the upper casing half
22
and the connecting member
21
, between the upper casing half
22
and the connecting shaft
11
, between the blade connecting arms
30
and the motor
10
, and between fan blades
31
and the blade connecting arms
30
.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a ceiling fan which has a simple construction that is easy to assemble.
According to this invention, the ceiling fan includes a motor having a stator with first upper and lower end portions opposite to each other in an upright direction, and a rotor with annular second upper and lower end portions surrounding concentrically and radially spaced apart from the first upper and lower end portions of the stator respectively and rotatable about an axis parallel to the upright direction, and a lateral circumferential portion disposed between the second upper and lower end portions. An upper cover includes an upper major wall which is mounted on the first upper end portion, and an annular skirt portion which extends downwardly from a periphery of the upper major wall. The annular skirt portion is spaced radially apart from and shields an upper part of the lateral circumferential portion to form an annular first peripheral edge. A casing body includes an annular rotor connecting portion secured threadedly on the second lower end portion of the rotor, and an annular shielding portion extending outwardly and upwardly from the rotor connecting portion towards the first peripheral edge. The annular shielding portion is spaced radially apart from and shields a lower part of the lateral circumferential portion to form an annular second peripheral edge proximate to and spaced apart from the first peripheral edge. A plurality of blade connecting members are angularly spaced from each other, and extend radially and outwardly from the shielding portion such that a plurality of fan blades are secured threadedly on the blade connecting members, respectively.
Preferably, the rotor connecting portion includes a plurality of rotor connecting arms, and the shielding portion includes a plurality of shielding walls. Each rotor connecting arm is formed integrally with one of the shielding walls and one of the blade connecting members.
Preferably, the ceiling fan further includes a lamp seat which has a major wall secured threadedly on the first lower end portion of the stator, and an annular surrounding wall extending downwardly from a periphery of the major wall. A lampshade includes a bowl-shaped bottom portion which has an annular engaging flange disposed around the axis and engaging the annular surrounding wall of the lamp seat for receiving a lamp.
REFERENCES:
patent: 5873701 (1999-02-01), Shiu
Look Edward K.
McAleenan James M.
Rodman & Rodman
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