Water circulation pump for an aquarium

Details Water circulation pump for an aquarium Water circulation pump for an aquarium

2000-10-24

2002-10-08

Freay, Charles G. (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C417S313000, C446S267000, C119S253000

Reexamination Certificate

active

06461122

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a water circulation pump, and more particularly to a water circulation pump for an aquarium. The water circulation pump for an aquarium in accordance with the present invention provides a source of power to drive a decorative device to make the aquarium looking more vivid and vigorous.
2. Description of Related Art
With reference to
FIGS. 4 and 5
, a conventional water circulation pump for an aquarium in accordance with the prior art comprises a first casing (
50
) and a stator device (not numbered) mounted in the first casing (
50
). The first casing (
50
) includes a first side having a positioning shaft (
51
) horizontally extending therefrom and a second side having a through hole (
52
) defined therein. A flange (
53
) extends out from the second side of the casing (
50
) around the through hole (
52
) and forms a pump cavity (
530
) within the flange (
53
). An outlet (
54
) is defined in the outer periphery of the first casing (
50
) and communicates with the pump cavity (
530
). An inlet (
55
) is defined in the outer periphery of the first casing (
50
) and communicates with the inside of the first casing (
50
).
A rotor (
60
) is mounted in the first casing (
50
). The rotor (
60
) comprises a sleeve (
601
), a magnetic shaft (
61
) and an impeller (
62
). The magnetic shaft (
61
) has a longitudinal hole (
63
) centrally defined therein and is securely pressed onto the sleeve (
511
). The impeller (
62
) is also securely pressed onto the sleeve (
511
) so that when the magnetic shaft (
61
) rotates, the impeller (
62
) will rotate. The sleeve (
511
) is slid onto the positioning shaft (
51
), and the impeller is in the pump cavity (
530
) of the first casing (
50
).
The first casing (
50
) further includes a cover (
56
) attached to the flange (
53
) to close the pump cavity (
530
) and form a water channel from the inlet (
55
) to the outlet (
54
) via the pump cavity (
530
). A second casing (
70
) is attached to the first casing (
50
) to securely hold the cover (
56
) in place. The second casing (
70
) has multiple suction cups (
71
) attached to the bottom of the second casing (
70
) to securely mount the water circulation pump on the aquarium.
Water is sucked into the pump cavity (
530
) and injected into the aquarium from the outlet (
54
) by the impeller (
62
) of the rotor (
60
) to form a water current in the aquarium when the rotor (
60
) rotates. The conventional water circulation pump for an aquarium in accordance with the prior art only pumps water into the aquarium to form a water current. Other functions must be performed by other pieces of equipment in an aquarium.
The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional water circulation pump for an aquarium.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, a water circulation pump for an aquarium includes a shaft engaged to the impeller rotor assembly. A pinion is securely mounted on the free end of the shaft to drive a reduction device. An output shaft is attached to a final output gear of the reduction device to provide a source of power to drive another device. For example, the output shaft can drive a decorative device to make the aquarium looking more vivid and vigorous.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.


REFERENCES:
patent: 5727933 (1998-03-01), Laskaris et al.
patent: 6062827 (2000-05-01), Shu

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