Part-replaceable water dispenser for domestic animals

A part-replaceable water dispenser for domestic animals, being mounted on a trough having a back wall that is provided at an inner upper middle area with an internally threaded joint, such that a water pipe and said water dispenser are respectively detachably screwed to upper and lower ends of said joint for the purpose of easy replacement of said water dispenser when necessary, said water dispenser comprising a stopper, a control bar, a spring, and an externally threaded ring nut;

• said stopper including a lower hollow tubular portion that has a lower part being beveled to provide a curved cut, an upper externally threaded sleeve portion that is screwed into said lower end of said joint on said trough, and a control opening formed in said stopper between said tubular portion and said sleeve portion;
• said control bar being downward inserted from said sleeve portion into said stopper, such that a flange formed near an upper end of said control bar abuts on and normally closes said control opening in said stopper with a section of said control bar below said flange located in said tubular portion and partially exposed from said curved cut on said tubular portion, and a sealing washer being disposed around said control bar between said flange and said control opening;
• said spring being put around said control bar above said flange;
• and
• said externally threaded ring nut being screwed into an upper end of said sleeve portion of said stopper to confine said spring to said stopper between said ring nut and said flange, so that said spring normally pushes said control bar toward said control opening for said flange and said sealing washer to tightly close said control opening;
• whereby said control bar could be biased by an external force applied on it to a limited extent defined by a lower wall of said tubular portion of said stopper, in order to produce a gap between said flange on said control bar and said control opening of said stopper for water stored in said water pipe to flow down into said tubular portion and said trough via said gap, and said control bar could automatically return to an original position in said stopper to close said control opening again when said external force applied on said control bar is removed.