Spout structure of a drinking fountain for a pet

Details Spout structure of a drinking fountain for a pet Spout structure of a drinking fountain for a pet

2003-01-29

2004-09-07

Price, Thomas (Department: 3643)

Animal husbandry

Watering or liquid feed device

Drop-delivering

Reexamination Certificate

active

06786180

ABSTRACT:

RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to a pet drinking fountain, and more particularly to a spout structure of the pet drinking fountain.
BACKGROUND OF THE INVENTION
As shown in
FIG. 18
, a pet drinking fountain
10
of the prior art comprises a water reservoir
11
and a spout
12
. As the level of water in the water reservoir
11
is caused to drop due to water consumption by pets, a vacuum is formed in the water reservoir
11
. Such a void space tends to hinder the discharge of water by the spout
12
. The hindrance of water discharge becomes more apparent in the event that the water reservoir is relatively small in volume.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a pet drinking fountain which is free of the deficiency of the prior art pet drinking fountain described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a pet drinking fountain comprising a water reservoir, a spout, and a muzzle in which a stop ball is movably held. The muzzle is fastened with the outer end of the spout. The spout is provided in the interior with an air tube which is provided with an air passage extending through both longitudinal ends of the air tube. The air tube is located in the interior of the spout such that the outer wall of the air tube and the inner wall of the spout form therebetween a water passage in communication with the interior of the water reservoir and the interior of the muzzle, and that the air passage of the air tube is in communication with the interior of the water reservoir and the interior of the muzzle.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings.


REFERENCES:
patent: 4807567 (1989-02-01), Atchley
patent: 5549074 (1996-08-01), Hui
patent: 5669329 (1997-09-01), Krause
patent: 5934222 (1999-08-01), Hwang
patent: 6435134 (2002-08-01), Ho
patent: 6561129 (2003-05-01), Cheng

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