Vacuum device connected to hose

Abstract

A vacuum device connected to a hose includes a joint portion having a containing space detachably connected to a water-inlet faucet, a retaining edge formed inside the containing space for abutting at least one water-inlet hole with a sealskin of a plug, a groove formed at the bottom of the retaining edge for installing a seal plate to seal a water-outlet hole capable of closing or opening a gap from the plug, and an underlying formed at the bottom of the groove and having an inner wall, and a water outlet portion, including a main body connected to an inner wall of the underlying for defining at least one vent, and an installation space formed inside the main body and detachably connected to a water-outlet hose. The use of the sealskin and seal plate reduces the number of components of the vacuum device and achieves a cost-effective effect.

What is claimed is: 
     
         1 . A vacuum device connected to a hose, comprising:
 a joint portion, including a containing space detachably connected to a water-inlet faucet, a retaining edge formed inside the containing space and provided for abutting at least one water-inlet hole with a sealskin of a plug, a groove formed at the bottom of the retaining edge and provided for installing a seal plate to seal a water-outlet hole capable of maintaining a close connection or producing a gap with the plug, and an underlying formed at the bottom of the groove and having an inner wall; and   a water outlet portion, including a main body connected to an inner wall of the underlying for defining at least one vent, and an installation space formed inside the main body and detachably connected to a water-outlet hose;   thereby, when water flows into the at least one water-inlet hole and impacts the seal plate, the aperture of the water-outlet hole is spread open and expanded for keeping flowing water in a direction towards the back of the installation space; and   when the aperture of the water-outlet hole and the plug maintain a close connection with each other, external air enters into the at least one vent to discharge the water remained in the water outlet portion to prevent freezing at low temperature; and when air pressure in the water outlet portion is greater than the air pressure of the external air, pressure is released from the at least one vent.   
     
     
         2 . The vacuum device connected to a hose according to  claim 1 , further comprising a containing space formed at the joint portion for fixing a fastener of the water-inlet faucet. 
     
     
         3 . The vacuum device connected to a hose according to  claim 1 , wherein the plug has an appearance of a spherical surface. 
     
     
         4 . The vacuum device connected to a hose according to  claim 1 , wherein the plug has a portion protruded from the bottom of the water-outlet hole, when the aperture of the water-outlet hole and the plug maintain a close connection with each other. 
     
     
         5 . The vacuum device connected to a hose according to  claim 2 , wherein the plug has a portion protruded from the bottom of the water-outlet hole, when the aperture of the water-outlet hole and the plug maintain a close connection with each other.