U.S. patent application number 10/395074 was filed with the patent office on 2004-09-30 for double shell structure for air pumps.
This patent application is currently assigned to Meiko Pet Corporation. Invention is credited to Wang, Chiao-Ming.
Application Number | 20040191084 10/395074 |
Document ID | / |
Family ID | 33479731 |
Filed Date | 2004-09-30 |
United States Patent
Application |
20040191084 |
Kind Code |
A1 |
Wang, Chiao-Ming |
September 30, 2004 |
Double shell structure for air pumps
Abstract
A double shell structure for air pumps has an outer shell and an
inner shell housed in the outer shell for installing an air pump
body. The double shell structure can effectively reduce noise
leakage resulting from air pump operation.
Inventors: |
Wang, Chiao-Ming; (Taichung
Hsien, TW) |
Correspondence
Address: |
BRUCE H. TROXELL
SUITE 1404
5205 LEESBURG PIKE
FALLS CHURCH
VA
22041
US
|
Assignee: |
Meiko Pet Corporation
|
Family ID: |
33479731 |
Appl. No.: |
10/395074 |
Filed: |
March 25, 2003 |
Current U.S.
Class: |
417/312 |
Current CPC
Class: |
F04B 39/0033
20130101 |
Class at
Publication: |
417/312 |
International
Class: |
F04B 039/00 |
Claims
I claim:
1. A double shell structure for air pumps comprising an outer shell
and an inner shell housed in the outer shell, the outer shell and
the inner shell being interposed by a hollow space therebetween,
the inner shell having a hollow housing chamber for installing an
air pump body such that noise resulting from operation of the air
pump body is reduced from leaking through the inner shell and the
outer shell.
2. The double shell structure for air pumps of claim 1, wherein the
outer shell includes an outer upper lid and an outer base.
3. The double shell structure for air pumps of claim 1, wherein the
inner shell includes an inner upper lid and an inner base.
4. The double shell structure for air pumps of claim 3, wherein the
inner base has a lateral side which has at least one notch forming
thereon.
5. The double shell structure for air pumps of claim 3, wherein the
inner upper lid has a downward recess which has a lid peripheral
rim slightly larger than the outer peripheral rim of the inner
base.
6. The double shell structure for air pumps of claim 5, wherein the
inner base has a top rim in contact with a soft pad, and the inner
upper lid being covered on the soft pad to achieve a tightly
sealing.
7. The double shell structure for air pumps of claim 6, wherein the
inner upper lid has an opening to allow an air inlet duct to run
through.
8. The double shell structure for air pumps of claim 7, wherein the
soft pad and the inner upper lid are interposed by a thin sheet
which has an opening to couple with a lower section of the air
inlet duct.
9. A double shell structure for air pumps comprising an outer shell
and an inner shell housed in the outer shell, the outer shell and
the inner shell being interposed by a hollow space therebetween,
the inner shell having a hollow housing chamber for installing an
air pump body, the outer shell having an outer upper lid which has
an inner side forming a downward rim surrounding a recess for
housing a soft pad to allow the outer upper lid to cover the top
rim of the inner shell to increase tightly fastening effect.
10. The double shell structure for air pumps of claim 9, wherein
the inner shell has at least one notch to allow an air discharge
duct to run through.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to the shell structure of air pumps
and particularly to air pumps that have a double shell structure
for reducing noise leakage during operation.
[0003] 2. Description of the Prior Art
[0004] Conventional shell structure for air pumps (referring to
FIG. 1) generally includes a shell 2 consisting of an upper lid 21
and a base 22. The shell 2 has a hollow housing chamber 20 located
inside for installing the body 1 of an air pump. When the air pump
body 1 operates, air is discharged through an air duct 11 into an
aquarium for use. Such a structure generates a greater noise when
the air pump body 1 operates. It becomes an annoyance in house
environments. While breeding pet fish can enhance environmental
aesthetics and provide visual amusement, the generated noise spoils
house serenity.
SUMMARY OF THE INVENTION
[0005] In view of the aforesaid disadvantages, the object of the
invention is to provide a double shell structure for air pumps to
reduce the noise leakage during air pump operation.
[0006] The double shell structure of the invention mainly has an
inner shell housed in an outer shell. The air pump body is
installed in the inner shell. By means of the double shell
structure, leakage of noise generated by the air pump during
operation may be effectively reduced.
[0007] The foregoing, as well as additional objects, features and
advantages of the invention will be more readily apparent from the
following detailed description, which proceeds with reference to
the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a sectional view of a conventional air pump.
[0009] FIG. 2 is an exploded view of the invention.
[0010] FIG. 3 is a sectional view of the invention.
[0011] FIG. 4 is a sectional view of another embodiment of the
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0012] Referring to FIGS. 2 and 3, the invention mainly includes an
outer shell 31 and an inner shell 32 located in the outer shell.
The outer shell 31 and the inner shell 32 are interposed by a
hollow space 310. The inner shell 32 has a hollow housing chamber
320 for installing an air pump body 4. The outer shell 31 consists
of an outer upper lid 311 and an outer base 312 coupling together.
The outer base 312 has a top edge forming an indented coupling rim
3124. A sealing gasket 34 is mounted on the coupling rim 3124 to
couple with another coupling rim 3112 formed on the inner side of
the bottom edge of the outer upper lid 311 to form a seal to
enhance noise insulation effect. Then screws 3123 are engaged with
screw holes 3121 to fasten the outer upper lid 311. The outer upper
lid 311 further has at lest one semi-circular opening 3111 on the
lateral side corresponding to at least one semi-circular opening
3122 on the outer base 312 to form at least one air discharge
anchor hole A (the number of the hole depends on the number of air
discharge ducts of the air pump body 4). The inner shell 32 has an
inner base 322 to couple with an inner upper lid 321. The inner
base 322 has a hollow chamber 320 for installing the air pump body
4, and one lateral side having at least one notch 3221 to enable an
air discharge duct 41 to run through to connect to an elbow duct
42. The elbow duct 42 has another end connecting to another air
discharge duct 43 which couples with a duct sleeve 44 for
discharging air. The inner upper lid 321 has a downward recess with
a lid peripheral rim 3214 slightly larger than the outer peripheral
rim of the inner base 322. The inner upper lid 321 further has an
opening 3211 to allow an air inlet duct 35 to run through. The air
inlet duct 35 has a lower section 351 running through the inner
side of the inner upper lid 321 to couple with an opening 361 of a
thin sheet 36 (which serves to eliminate transmission of resonance
and reduce noise generation) and an opening 331 of a soft pad 33
such that the soft pad 33 may be in contact with the top rim of the
inner base 322. Then the inner upper lid 321 may be closed and
fastened through engaging screws 3213 into the apertures 3212 and
332 of the inner upper lid 321 and the soft pad 33 and the screw
holes 3222 of the inner base 322, thereby to fasten the inner upper
lid 321 tightly to the inner base 322.
[0013] By means of the construction set forth above, when the air
pump body 4 operates (air pump operation is known in the art and
forms no part of the invention, thus details are omitted),
vibrations and noises occur. Through the double sealing structure
of the inner shell 32 and outer shell 31, most noise leakage are
eliminated, thus noise annoying problem can be effectively
resolved.
[0014] Refer to FIG. 4 for another embodiment of the invention. An
outer shell 31' includes an outer upper lid 311' to cover an outer
base 312'. An inner shell 32' is housed in the outer shell 31'. The
inner shell 32' has a hollow housing chamber 320' for installing an
air pump body 4'. The outer shell 31' and the inner shell 32' are
interposed by a hollow space 310'. The inner side of the outer
upper lid 311' has an indented and downward lid rim 3110' to hold a
soft pad 33' for covering to the top rim of the inner shell 32'.
The inner shell 32' has at least one notch 3210' to enable an air
discharge duct 41' to run through.
[0015] By means of the construction set forth above, noise
resulting from vibrations during air pump operation may be reduced
from leaking out. Thus people can enjoy the pleasure of breeding
pet fish and the serenity of the house can be maintained.
* * * * *