U.S. patent application number 09/759226 was filed with the patent office on 2002-07-18 for blade structure for ceiling fan.
Invention is credited to Huang, Yung-Chung.
Application Number | 20020094273 09/759226 |
Document ID | / |
Family ID | 25054867 |
Filed Date | 2002-07-18 |
United States Patent
Application |
20020094273 |
Kind Code |
A1 |
Huang, Yung-Chung |
July 18, 2002 |
Blade structure for ceiling fan
Abstract
An improved blade structure for ceiling fan includes a plurality
of brackets and a blade element. The brackets are made of wood,
bamboo, metal, plastic or the like. The blade element is made of
paper, cloth, plastics, thin metal sheet, rubber, synthetic paper
or the like. The blade element is bonded to the brackets by
adhering, clamping, nailing, snapping, threading, screwing,
meshing, stitching, gluing, laminating, riveting or the like to
form a foldable blade structure.
Inventors: |
Huang, Yung-Chung; (Shu Lin
City, TW) |
Correspondence
Address: |
ROSENBERG, KLEIN & LEE
3458 ELLICOTT CENTER DRIVE-SUITE 101
ELLICOTT CITY
MD
21043
US
|
Family ID: |
25054867 |
Appl. No.: |
09/759226 |
Filed: |
January 16, 2001 |
Current U.S.
Class: |
416/143 ;
416/210R; 416/241A; 416/241R |
Current CPC
Class: |
F04D 25/088 20130101;
F05D 2300/42 20130101; F05D 2300/43 20130101; F04D 29/023 20130101;
F05D 2300/10 20130101; F05D 2230/23 20130101; F04D 29/382
20130101 |
Class at
Publication: |
416/143 ;
416/210.00R; 416/241.00R; 416/241.00A |
International
Class: |
F04D 029/34 |
Claims
What is claimed is:
1. An improved blade structure for ceiling fan comprising a
plurality of brackets and a blade element bonded to the brackets
for forming a foldable blade structure.
2. The improved blade structure for ceiling fan according to claim
1, wherein brackets are fastened to a blade frame through
fasteners.
3. The improved blade structure for ceiling fan according to claim
2, where the brackets have an outmost bracket fixedly fastened to
the blade frame through the fastener, and the remaining brackets
are pivotally fastened to the blade frame through fasteners such
that the pivotal brackets are capable of swinging about the
fasteners to selectively fold or extend.
4. The improved blade structure for ceiling fan according to claim
1, wherein the brackets are made of material selected from the
group consisting of wood, bamboo, metal or plastic.
5. The improved blade structure for ceiling fan according to claim
1, wherein the blade element is made of material selected from the
group consisting of paper, cloth, plastics, thin metal sheet,
rubber or synthetic paper.
6. The improved blade structure for ceiling fan according to claim
1, wherein the blade element is bonded to the brackets by means of
adhering, clamping, nailing, snapping, threading, screwing,
meshing, stitching, gluing, laminating or riveting.
7. The improved blade structure for ceiling fan according to claim
1, wherein the blade element has an outer edge bent to form a
covering section to shroud the outer end of the brackets.
Description
FIELD OF THE INVENTION
[0001] This invention relates to an improved blade structure for
ceiling fan and particularly a blade structure for ceiling fan that
is foldable.
BACKGROUND OF THE INVENTION
[0002] Conventional blades for ceiling fan are usually made by
integral forming. The blade has a relatively great thickness. It
consumes more materials and is heavier. When in use, it also adds
more workload for the motor and consumes more electricity power,
and tends to lower the rotation speed and reduces air ventilation
volume. There are still rooms for improvement.
SUMMARY OF THE INVENTION
[0003] In view of the foregoing disadvantages, it is therefore an
object of this invention to provide an improved blade structure for
ceiling fan that comprises a plurality of brackets and at least one
blade element bonded to the brackets to form a foldable structure.
The blade structure may be fastened to a blade frame or an
impeller. The blade structure thus formed can greatly reduce costs,
size and weight, and may be folded to a smaller size to facilitate
transportation. When in use, it also can reduce workload to the
motor and increase motor rotation.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] The invention, as well as its many advantages, may be
further understood by the following detailed description and
drawings. The drawings are only to serve for reference and
illustrative purpose, and do not intend to limit the scope of the
present invention.
[0005] FIG. 1 is a perspective view of this invention
[0006] FIG. 2 is an exploded view of this invention.
[0007] FIG. 3 is a top view of this invention assembled to a
ceiling fan.
[0008] FIG. 4 is a top view of this invention at an extended
state.
[0009] FIG. 5 is a top view of this invention at a folded
state.
[0010] FIGS. 6A, 6B and 6C are schematic views of other embodiments
of this invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0011] Referring to FIGS. 1 and 2, the blade structure according to
this invention includes a plurality of brackets 10 and at least one
blade element 11. The brackets 10 are made of wood, bamboo, metal
(such as aluminum, zinc, steel or the like), plastics, or the like.
The blade element 11 is made of paper, cloth, plastics, thin metal
sheet, rubber, synthetic paper, or the like. Each of the brackets
10 has a selected length and may be formed in a shape desired (such
as the ones shown in FIGS. 6A and 6B). The blade element 11 is
extended and bonded to the brackets 10. The outer edge of the blade
element 11 may be bent to form a covering section 14 to shroud the
outer end of the brackets 10. The brackets 10 and blade element 11
may be bonded together by adhering, clamping, nailing, snapping,
threading, screwing, meshing, stitching, gluing, laminating,
riveting, or any other fastening means known in the art to form a
foldable structure (shown in FIG. 5). The brackets 10 support the
blade element 10 like a sail or kite, and may be formed in a
polygon, or in a solid or hollow structure.
[0012] FIGS. 1, 2 and 3 illustrate detailed structure of this
invention. The brackets 10 have respectively one end fastened to a
blade frame 12 (or impeller) by means of a fastener 13. The outmost
bracket 10 (according to rotational direction) is fixed to blade
frame 12 by the fastener 13 at one end thereof. The remaining
brackets 10 are pivotally engaged with the blade frame 12 at one
end thereof by means of the fasteners 13. Hence when the fan
rotates, the pivotal brackets 10 will swing about the fasteners 13
and be folded or extended selectively. Referring to FIG. 5, when
the blade structure rotates counterclockwise (or clockwise), the
leftmost (or rightmost) bracket 10 will remain fixedly mounted on
the blade frame 12 without moving, but other brackets 10 pivotally
engaged with the blade frame 12 will swing to the right (or left)
side for controlling the extension of the blade element 11 (as
shown in FIG. 4) to form a larger area whereby to achieve air
ventilation purpose through the driving of the motor. FIG. 6C shows
that the brackets 10 may also be stacked at one end to engage with
the blade frame 12 by means of one fastener 13.
[0013] Through this invention, the brackets and blade element may
be organized and assembled to a wide variety of forms. It is easy
to assemble and install by users in a DIY fashion. It can greatly
reduce cost, shrink size, reduce weight, and be folded to a smaller
size for package (as shown in FIG. 5) to lower transportation cost.
When in use, it can reduce motor workload and consequently reduce
consumption of silicon steel and coils used in the motor. Because
of its lighter weight, motor rotation efficiency will also be
improved.
[0014] In summary, this invention provides an improved blade
structure which effectively resolves the problems and disadvantages
happened to conventional ceiling fans such as integrally formed
blades, thicker blade element, consuming more materials, weight
heavier, and added motor workload.
[0015] It may thus be seen that the objects of the present
invention set forth herein, as well as those made apparent from the
foregoing description, are efficiently attained. While the
preferred embodiments of the invention have been set forth for
purpose of disclosure, it would be obvious to those skilled in the
art that various other changes and modifications can be made
according to the embodiments. Accordingly, the appended claims are
intended to cover all embodiments which do not depart from the
spirit and scope of the invention.
* * * * *