Vacuum breaker

Abstract

A vacuum breaker includes a hollow bushing with an end in communication with the atmosphere and the other end in communication with at least one water outlet, a check plugger moveably disposed in the bushing, and a sealing sleeve disposed in the bushing adjacent to the upper end of the check plugger. The check plugger falls automatically down by gravity. The check plugger has a conical upper end. The upper end has a closing surface. The sealing sleeve is defined with a central hole receiving the upper end of the check plugger. An inner conical surface is formed in the inner wall of the central hole. The inner conical surface is closely abutted against by the closing surface.

1 . A vacuum breaker mounted in a plumbing fixture with at least one water outlet connected to a hand held device, and the vacuum breaker comprising: 
 a hollow bushing having a first end in fluid communication with the atmosphere and a second end in fluid communication with the at least one water outlet;    a check plugger moveably disposed in the hollow bushing in a vertical manner and having a conical upper end with a closing surface; and    a sealing sleeve disposed in the hollow bushing adjacent to the upper end of the check plugger, and having a central hole defined completely through the sealing sleeve, the central hole having an inner wall with an inner conical surface, and the inner conical surface being closely abutted by the closing surface;    whereby the check plugger will automatically fall down by gravity when an event of pressure drop of water is occurred in the plumbing fixture.    
   
   
       2 . The vacuum breaker as claimed in  claim 1 , further comprising a leakage prevention device mounted between the closing surface and the inner conical surface.  
   
   
       3 . The vacuum breaker as claimed in  claim 2 , wherein the leakage prevention device includes at least one annular ring formed on the inner conical surface.  
   
   
       4 . The vacuum breaker as claimed in  claim 1 , wherein the check plugger further has a plurality of protrusions adjacent to the closing surface.  
   
   
       5 . The vacuum breaker as claimed in  claim 3 , wherein the check plugger further has a plurality of protrusions adjacent to the closing surface.  
   
   
       6 . A water diverter valve for a plumbing fixture, and the water diverter valve comprising: 
 a pipe connector having a first water outlet and a second water outlet;    a housing connected to the pipe connector;    a hollow central shaft disposed in the housing and partially held in and by the pipe connector, the central shaft having two end openings and at least one through hole in fluid communication with the first and second water outlets;    a bushing connected with the central shaft;    a hollow handle shaft connected with the bushing, and having an outside end and a plurality of air intakes defined adjacent to the outside end of the handle shaft, wherein the air intakes, each of the at least one through hole, the hollow handle shaft, the bushing and the hollow central shaft are in fluid communication with each other; and    a vacuum breaker disposed in the bushing, the vacuum breaker comprising    a check plugger moveably disposed in the hollow bushing in a vertical manner and having a conical upper end with a closing surface; and    a sealing sleeve disposed in the hollow bushing adjacent to the upper end of the check plugger, and having a central hole defined completely through the sealing sleeve, the central hole having an inner wall with an inner conical surface, and the inner conical surface being closely abutted by the closing surface;    whereby the check plugger will automatically fall down by gravity to define a gap between the closing surface and the inner conical surface thereby allowing air enter through the air intakes, the handle shaft, the gap, the central shaft and the through hole when an event of pressure drop of water is occurred in the plumbing fixture.    
   
   
       7 . The water diverter valve as claimed in  claim 6 , further comprising a leakage prevention device disposed between the closing surface and the inner conical surface.  
   
   
       8 . The water diverter valve as claimed in  claim 7 , wherein the leakage prevention device includes at least one annular ring formed on the inner conical surface.  
   
   
       9 . The water diverter valve as claimed in  claim 6 , wherein the check plugger further has a plurality of protrusions adjacent to the closing surface.  
   
   
       10 . The water diverter valve as claimed in  claim 8 , wherein the check plugger further has a plurality of protrusions adjacent to the closing surface.