U.S. patent application number 10/610882 was filed with the patent office on 2005-01-06 for air pump.
Invention is credited to Lin, Jung-Hua.
Application Number | 20050002817 10/610882 |
Document ID | / |
Family ID | 33552314 |
Filed Date | 2005-01-06 |
United States Patent
Application |
20050002817 |
Kind Code |
A1 |
Lin, Jung-Hua |
January 6, 2005 |
Air pump
Abstract
An improved air pump is composed of a shell, a rotor, and a lid.
The shell includes a round chamber inside, an inlet and an outlet
both running therethrough for communicating outside, and an axial
hole positioned in the round chamber and having a different center
from that of the round chamber. The rotor is disposed inside the
round chamber, and includes a rotation shaft at the center thereof
for inserting into the axial hole of the round chamber, three bevel
slots recessed inwards from an outer periphery thereof, and three
movable blades respectively mounted inside the three bevel slots
and respectively moving frictionally along long axles of the bevel
slots. The lid is coved on the shell to seal the round chamber.
Inventors: |
Lin, Jung-Hua; (Taichung
Hsien, TW) |
Correspondence
Address: |
BROWDY AND NEIMARK, P.L.L.C.
624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
|
Family ID: |
33552314 |
Appl. No.: |
10/610882 |
Filed: |
July 2, 2003 |
Current U.S.
Class: |
418/236 ;
418/259 |
Current CPC
Class: |
F04C 18/3441
20130101 |
Class at
Publication: |
418/236 ;
418/259 |
International
Class: |
F01C 001/00 |
Claims
What is claimed is:
1. An air pump comprising: a shell having a round chamber inside
and an inlet and outlet both positioned at an inner periphery
thereof and running through said shell to outside, said round
chamber having an axial hole inside, said axial hole having a
center different from that of said round chamber, the distance
between said inlet and said axial hole being larger than that
between said outlet and said axial hole; a rotor received in said
round chamber and having a rotation shaft protruding outwards from
the center thereof for connecting an external power source, said
rotation shaft being inserted into said axial hole of said round
chamber, a plurality of bevel slots recessed inwards from an outer
periphery thereof, each of said bevel slots having a long axle
crossed with an tangential of the outer periphery of said rotor at
a predetermined angle, and a plurality of movable blades
respectively mounted in said bevel slots and moving
outwards/inwards along the long axle of said bevel slot, whereby
said blades will be centrifugally outthrowed while said rotor is
rotated, and each have an outward end towards outside to engage
against and move frictionally along the inner periphery of the
round chamber; and a lid covered on said shell to seal said round
chamber, such that said round chamber communicates with outside
merely via said inlet and said outlet.
2. The air pump as defined in claim 1, wherein the predetermined
angle at which the long axle of each said bevel slot is crossed
with the tangential of the outer periphery of said rotor is an
acute angle along a direction of the rotation of said rotor.
3. The air pump as defined in claim 1, wherein the distance between
said outlet and said axial hole is smaller than the radius of said
round chamber.
4. The air pump as defined in claim 1, wherein each of said blades
is a long plate member.
5. The air pump as defined in claim 1, wherein said shell further
comprises a silencing filter at an outward end of said inlet.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to air pumps, and
more particularly, to an air pump which keeps pumping the air
outwards.
[0003] 2. Description of the Related Art
[0004] There are two kinds of conventional industrial air pumps for
pumping the air wards and further generating airstream. One is
so-called air compressor, which pumps the air by a constantly
reciprocating cylinder, accumulates the pressured air in a pressure
tank and releases the pressured air from the pressure tank when it
is required. However, the air compressor is structurally complex,
high in product cost, difficult for repair, and noisy when it is
operated. The other is the common blower, which keeps pumping the
air in airways outwards by the strong thrust of a high-speed
rotating impeller. Although the impeller is designed by a special
angle to generate a predetermined wind pressure, the blower
requires a powerful motor as an output power source, which needs
high production cost and high technology and is thereby
commercially uncompetitive.
SUMMARY OF THE INVENTION
[0005] The primary objective of the present invention is to provide
an improved air pump which is low in production cost, structurally
simple, easy to be assembled, and outputs high-pressure
airstream.
[0006] The foregoing objective of the present invention is attained
by the improved air pump which is composed of a shell, a rotor, and
a lid. The shell includes a round chamber inside, an inlet and an
outlet both running therethrough for communicating outside, and an
axial hole positioned in the round chamber and having a different
center from that of the round chamber. The rotor is disposed inside
the round chamber, and includes a rotation shaft at the center
thereof for inserting into the axial hole of the round chamber,
three bevel slots recessed inwards from an outer periphery thereof,
and three movable blades respectively mounted inside the three
bevel slots and respectively moving frictionally along long axles
of the bevel slots. The lid is coved on the shell to seal the round
chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is an exploded view of a preferred embodiment of the
present invention;
[0008] FIG. 2 is an elevational view of a shell constructed
according to the preferred embodiment of the present invention;
[0009] FIG. 3 is an elevational view of the shell and a rotor
constructed according to the preferred embodiment of the present
invention; and
[0010] FIGS. 4-6, similar to FIG. 3, are schematic views of the
preferred embodiment of the present invention at work.
DETAILED DESCRIPTION OF THE INVENTION
[0011] Referring to FIGS. 1-3, an air pump constructed according to
a preferred embodiment of the present invention is composed of a
shell 10, a rotor 20, and a lid 30.
[0012] The shell 10 includes a round chamber 11 inside, an inlet 12
and an outlet 13 both positioned at an inner periphery thereof and
running through the shell 10 to outside, and a silencing filter 14
mounted at an outward end of the inlet 12 for filtering dust in the
air and reducing noise generated while the air flows into the inlet
12. The round chamber 11 is provided with an axial hole 15 inside,
which center is different from that of the round chamber 11. The
distance between the outlet 13 and the axial hole 15 is smaller
than that between the inlet 12 and the axial hole 15, and is also
smaller than the radius of the round chamber 11.
[0013] The rotor 20 is received in the round chamber 11 and
includes a rotation shaft 21, a plurality of bevel slots 22, and a
plurality of movable blades 23. The rotation shaft 21 protrudes
outwards from the center of the rotor 20 and is inserted into the
axial hole 15 of the round chamber 11 for connecting an external
power source which drives the rotor 20 to rotate. In the present
embodiment, there are three bevel slots 22 recessed towards inside
from an outer periphery of the rotor 20, and there are three
movable blades 231, 232, and 233 disposed respectively in the three
bevel slots 22. Each of the three bevel slots 22 has a long axle
crossed with a tangential of the outer periphery of the rotor 20 at
a predetermined angle (0) which is an acute angle along a direction
that the rotor 20 is rotated. Each of the three movable blades 231,
232, and 233 is a long plate member and capable of moving outwards
or inwards along the long axle of the bevel slot 22, such that the
blades 23 will be centrifugally outthrowed while the rotor 20 is
rotated and each have an outward end to engage against and move
frictionally along the inner periphery of the round chamber 11.
[0014] The lid 30 is covered on the shell 10 to seal the round
chamber 11, enabling the round chamber 11 to communicate with
outside merely via the inlet 12 and the outlet 13.
[0015] Referring to FIG. 3, when the air pump of the present
invention is operated, the blade 231 moves from a position A to a
position B, i.e. the blade 231 passes by the outlet 13 and moves to
a position approaching the inlet 12. In the meantime, a space (a)
defined among the rotor 20, the blade 231, and the round chamber 11
is confined and has no other passages in communication with outside
except the inlet 12 and the outlet 13 to be very low-pressure
closely to be vacuum.
[0016] Referring to FIG. 4, while the blade 231 moves and passes by
the inlet 12, the low-pressure space (a) will not stop sucking a
great amount of the outside air thereinto via the inlet 12 unless
the blade 232 moves and passes by the inlet 12, such that the space
(a) is full of the air, as shown in FIG. 5. Then, while the blade
232 keeps moving forwards along with the rotor 20, the space (a)
keeps decreasing to enable the inside air to be increasingly
compressed and thereby high-pressure, as shown in FIG. 6.
[0017] While the blade 231 passes by the outlet 13, the
high-pressure air inside the space (a) jets towards the outlet 13,
as shown in FIG. 3. Hence, the air jetted out of the outlet 13 of
the present invention is pressured airstream but not merely regular
airstream generated by that a regular impeller pushes the air
outwards. In conclusion, the present invention is lower in
production cost, structurally simpler, easier to be assembled, and
outputs more high-pressure airstream than the prior art.
* * * * *