BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tap structure, and more particularly to a check vacuum breaking device for a tap that can prevent polluted water and impurities from polluting a piping system and can prevent frozen water from obstructing the piping system.
2. Description of the Prior
Conventional tap capable of supplying water greatly includes a check vacuum breaking device installed therein to prevent polluted water and impurities from polluting a piping system because of a siphonage and to prevent water from remaining therein, obtaining vacuum breaking function.
With reference to FIGS. 6-8, a conventional check vacuum breaking device for a tap comprises a check member 5, a pressing member 6 made of metal material, and a pushing member 7; wherein the check member 5 is formed in a y-shaped tube shape, the y-shaped check member 5 includes an inflow end 51, an outflow end 52, and an air-admitting end 53; the pressing member 6 is formed in a T shape, and an upper body 61 of the pressing member 6 engages with of the air-admitting end 53 of the check member 5 and includes a plurality of air holes 611 arranged around a peripheral side thereof; the pushing member 7 includes a guiding pillar 71 extending to a central opening of the pressing member 6 and an anti-leak loop 73 fitted onto a stepped segment 72 thereof. As the check member 5 is in a water flowing state, the anti-leak loop 73 of the pushing member 7 attaches on a central rim 62 of the pressing member 6 vacuumingly. As stopping water supply, the pushing member 7 can apply its gravity and air to break a vacuum attaching state between the pressing member 6 and the pushing member 7 and to engage an opening of the inflow end 51 of the check member 5, thereby preventing the water from flowing backward.
However, such a conventional check vacuum breaking device still has the following disadvantages:
1. As stopping water supply, the pushing member 7 moves backward to engage the opening of the inflow end 51 of the check member 5 to stop back-flowing of the water, however the pushing member 7 and the opening of the inflow end 51 can not be closed to obtain a check function when an objected gets stuck between the pushing member 7 and the opening of the inflow end 51.
2. As the pushing member 7 is made of metal material, causing a high production cost, but as the pushing member 7 is made of plastic material, its weight is too light to move backward to engage the opening of the inflow end 51.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTION
The primary object of the present invention is to provide a check vacuum breaking device for a tap that as stopping water supply, the stopping pad of the fitting member contacts with the outlet of the chamber of the tap tightly to stop waterflow flowing backward because of a siphonage, thus preventing polluted water from flowing backward to pollute the piping system. Also as an object gets stuck between the stopping pad of the fitting member and the outlet of the chamber, the abutting portion of the stopping pad stops the object obstructing between the between the stopping pad and the outlet continuously.
Another object of the present invention is to provide a check vacuum breaking device for a tap that the loading member is disposed on the lower end of the fitting member and covered by the stopping pad, therefore the fitting member can be made of plastic material to lower production cost and displace downward freely by using the loading member.
A check vacuum breaking device for a tap in accordance with a preferred embodiment of the present invention comprises:
a locking member and a fitting member, wherein the locking member is screwed into a chamber of a tap, the chamber includes an inlet and an outlet, the locking member includes a cover member secured on a top end thereof and having a plurality of air bores disposed around a rim of the cover member, and having a shaft extending downward from a center of a bottom surface of the cover member, the fitting member is assembled to the chamber of the tap and includes a hollow peg extending upward from a central portion thereof and having a closed bottom to be fitted to the shaft of the locking member, and includes a stepped recess formed on an upper end thereof a stopping pad fitted to the stepped recess, characterized in that:
the fitting member includes a loading member fitted to a lower end thereof, and an anti-leak loop to cover the loading member;
wherein the loading member is formed in a loop shape;
wherein a stopping pad includes an abutting portion.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing the exploded components of a check vacuum breaking device for a tap in accordance with a preferred embodiment of the present invention;
FIG. 2 is a perspective view showing the assembly of the check vacuum breaking device for the tap in accordance with the preferred embodiment of the present invention;
FIG. 3 is a cross sectional view showing the assembly of the check vacuum breaking device for the tap in accordance with the preferred embodiment of the present invention;
FIG. 4 is a cross sectional view showing a water-flowing state of the check vacuum breaking device for the tap in accordance with the preferred embodiment of the present invention;
FIG. 5 is a cross sectional view showing a water-stopping state of the check vacuum breaking device for the tap in accordance with the preferred embodiment of the present invention;
FIG. 6 is a perspective view showing the exploded components of a conventional check vacuum breaking device for a tap;
FIG. 7 is a cross sectional view showing a water-flowing state of the conventional check vacuum breaking device for the tap;
FIG. 8 is a cross sectional view showing a water-stopping state of the conventional check vacuum breaking device for the tap.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
Referring to FIGS. 1-3, a check vacuum breaking device for a tap comprises a locking member 1 and a fitting member 2, wherein the locking member 1 is hollow and includes an upper body 11 disposed on a middle section thereof, includes an outer threading end 12 formed under the upper body 11, and a stop ring 13 fitted to the outer threading end 12, such that the locking member 1 is screwed into a chamber 31 of a tap 3 by using the outer threading end 12 so that the upper body 11 and the stop ring 13 abuts against the chamber 31, hence the locking member 1 closes the chamber 31 of the tap 3. The chamber 31 of the tap 3 includes a screwing orifice 311 mounted on a top end thereof, an inlet 312 arranged on a bottom end thereof, and an outlet 313 fixed on a peripheral side of a lower section thereof. The locking member 1 includes a cover member 14 secured on a top end thereof and having a plurality of air bores 141 disposed around a rim of the cover member 14, having a screw aperture 142 mounted on a center of a top surface of the cover member 14 to screw with a bolt T to lock a casing 4 onto the cover member 14, and having a shaft 143 extending downward from a center of a bottom surface of the cover member 14 and then extending out of the locking member 1. The fitting member 2 is formed in a hat shape and assembled to the chamber 31 of the tap 3, and includes a hollow peg 21 extending upward from a central portion thereof and having a closed bottom to be fitted to the shaft 143 of the locking member 1 and to limit a vertical displacement of the fitting member 2. The fitting member 2 also includes a stepped recess 22 formed on an upper end thereof, an anti-leak loop 23 fitted to the stepped recess 22, an annular loading member 24 fitted to a lower end thereof, and a stopping pad 25 with an abutting portion 251 to cover the loading member 24.
As water flows from the tap 3 as shown in FIG. 4, the fitting member 2 is pushed by the water to move upward along the hollow peg 21 and the shaft 143 so that the anti-leak loop 23 is biased against a lower end of the locking member 1 to generate a closed status, such that the water flows into the inlet 312 of the chamber 31 of the tap 3 and then flows out of the outlet 313.
As stopping the water as illustrated in FIG. 5, because the fitting member 2 is not pushed by the water any more, the fitting member 2 moves downward along the hollow peg 21 and the shaft 143 by ways of the weight of the loading member 24 so that a peripheral side of the inlet 312 of the chamber 3 is closed, such that as a siphonage generates, polluted water and impurities are stopped flowing back to a piping system from the outlet 313 via the inlet 312, and the anti-leak loop 23 of the fitting member 2 disengages from the lower end of the locking member 1 so that air in exterior flows to the chamber 31 of the tap 3 from the air bore 141 of the locking member 1, thereby forming a vacuum breaking state to flow water freely. In a frigid zone, the check vacuum breaking device of the present invention can be used to prevent the piping system from being obstructed because remained water becomes frozen.
It is apparent form the above description that the present invention has the following advantages:
1. As stopping water supply, the stopping pad 25 of the fitting member 2 contacts with the outlet 312 of the chamber 31 of the tap 3 tightly to stop waterflow flowing backward because of a siphonage, thus preventing polluted water from flowing backward to pollute the piping system. Also as an object gets stuck between the stopping pad 25 of the fitting member 2 and the outlet 312 of the chamber 31, the abutting portion 251 of the stopping pad 25 stops the object obstructing between the between the stopping pad 25 and the outlet 312 continuously.
2. The loading member 24 is disposed on the lower end of the fitting member 2 and covered by the stopping pad 25, therefore the fitting member 2 can be made of plastic material to lower production cost and displace downward freely by using the loading member 24.
While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Patent Application
20110000557
