Air pump for aquariums
a technology for air pumps and aquariums, which is applied to pump components, positive displacement liquid engines, liquid fuel engine components, etc., can solve the problems of increasing the size of air pumps, increasing fabrication costs, and irritating noise, so as to reduce noise, reduce noise, and reduce nois
Inactive Publication Date: 2007-10-11
YINGGUANG
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Benefits of technology
[0009] In view of the aforesaid problems, it is an object of the present invention to provide an air pump for aquariums that can reduce noise and can be made at a smaller size. It has an air pump casing which houses at least one air pump assembly. The air pump assembly has an air delivery duct communicating with a muffling chamber located on an outer bottom side of the base of the air pump casing. Air delivered by the air pump assembly passes through a circuitous path in the muffling chamber. Thus noise can be reduced. The size of the casing also is smaller.
Problems solved by technology
It is a high speed reciprocal operation and produces irritating noise which becomes an annoyance in the house.
While the prior references can reduce the noise, they create other problems, notably: 1.
Adding the muffling chambers increases the size of the air pump.
As a result, fabrication cost is higher.
The product is not competitive.
The larger air pump takes a lot of space in the aquarium.
It is constrained by the limited space and cannot provide desired noise reducing function.
Method used
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[0019] Referring to FIGS. 1 through 4, the air pump for aquariums of the present invention includes a casing 1 and at least one air pump assembly 2 located in the casing 1.
[0020] The casing 1 includes:
[0021] a upper cap 11 which has a hollow housing chamber 110, an inner wall 111 with a plurality of fastening struts 112, 113 and 114 located thereon that have respectively an internal screw hole. The center of the upper cap is fastened to a top plate 115 through a bolt 116 which runs through a center hole 1151 and engages with a fastening bolt 114; and
[0022] a base 12 which is coupled with the upper cap 11 to form the casing 1. It has a plurality of apertures 1211 and 1212 corresponding to the fastening struts 112 and 113 to be fastened by a plurality of bolts 1221 and 1222. The base 12 has at least one anchor plate 124 on an inner side 120 to install at least one air pump assembly 2, and at least one opening 123 communicating with a muffling chamber 126 on an outer bottom side 125...
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An air pump for aquariums to reduce noise and shrink the casing includes at least one air pump assembly in the casing. The air pump assembly has an air delivery duct communicating with a muffling chamber located on an outer bottom side of the base of the casing. Air discharged by the air pump assembly passes through a circuitous path in the muffling chamber. Thus noise can be reduced. The casing also can be shrunk to a smaller size.
Description
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The invention relates to an air pump for aquariums and particularly to a noise-reducing air pump that has a smaller size to supply air for aquariums. [0003] 2. Description of the Prior Art [0004] The general aquarium requires an air pump to supply oxygen to the living things bred therein. The air pump compresses air to generate air suction and discharge operations. It is a high speed reciprocal operation and produces irritating noise which becomes an annoyance in the house. Many schemes have been proposed in the prior art trying to resolve this problem. For instance R.O.C. patent publication Nos. 519194 and 416488 (called prior references hereinafter) have a plurality of enlarged air discharge chambers on one side of an air pump to form a muffling chamber to overcome the noise problem. [0005] While the prior references can reduce the noise, they create other problems, notably: [0006] 1. Adding the muffling chambers ...
Claims
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Login to View More IPC IPC(8): F04B39/00
CPCF04B39/0033F04B45/027F04B45/022F04B39/0061
Inventor WANG, CHIAO-MING
Owner YINGGUANG