GB2452773A

GB2452773A - Control valve

Info

Publication number: GB2452773A
Application number: GB0718068A
Authority: GB
Inventors: Yen-Ching Wang
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-17
Filing date: 2007-09-17
Publication date: 2009-03-18
Also published as: GB0718068D0

Abstract

A valve for an auto-cut off faucet comprises a faucet body 10, a water chamber 12 and a control valve 20. The upper section of the control valve body comprises an oil chamber 21 having a central hole 22 through which passes a valve rod 40. A spring 60 pushes the valve rod 40 up so that a seal 49 at the lower end of the valve rod 40 abuts the lower end of the center hole 22 of the body of the control valve 20. Pushing down a knob 15 opens the control valve 20 allowing water to flow from the water chamber 12 out of the faucet at 11. Oil in the chamber is simultaneously forced out of the oil chamber 21 by piston 45 and flows via passages 42, 41 back to the oil chamber. Releasing the knob 15 allows spring 60 to return the valve rod 40 to its uppermost position where the seal 49 shuts off the water supply.

Description

TITLE: CONTROL VALVE FOR AUTO-CUT OFF FAUCET

BACKGROUND OF THE INVENTION

(a) Technical Field of the Invention

The present invention relates to control valve, and in particular to a control valve of an auto-cut off faucet.

(b) Description of the Prior Art

Taiwanese Patent Publication No. 528134 entitled "Adjustable auto-cut off faucet for water saving" discloses the control of water flow rate and the buffer time of pressing the faucet by formation of a buffer time and the feedback flow of water between the outer cover and the water inlet valve without formation of vacuum. However, the buffer time control within the feedback flow formed within the valve body will not smoothly supply water as a result of blockage by impurities in water between valve body components.

Further, the water impurities blocked between the component of the control valve will cause an excessive wear to the components.

Taiwanese Patent Application No. 93218361 entitled "auto-cut off faucet control valve" discloses a control valve which prevents blockage by water impurities such that the components will not wear out by these impurities.

However, the interior of the valve body has a two-steps center hole for mounting with a stepped oil cup having a top end cover mounted with a valve plate, and the opening at the upper end of the valve body is mounted with a valve cover with a larger diameter internal threads as a limitation. When the piston moves up and down, the hydraulic at the interior of the oil cup will compress the fluid to flow through the two horizontal oil guiding hole and the middle hole of the valve rod and is in movement changes between the upper side and lower side of the piston. Further, the additional oil cup structure will increase the cost of production and the time for assembly the faucet.

SUMMARY OF THE INVENTION

The primaly purpose of the present invention is to provide a conirol valve for auto-cut off faucet having a faucet body and a water chamber in communication at one side thereof with a water-outlet section for mounting with a control valve, and a locking cover and an opening on the faucet body being limited with the control valve, and the control valve including a valve body, a valve rod module in combination with a piston and a valve needle, the upper section of the valve rod mounted with an elastic element and the upper end of the valve rod mounted with a pressing element passing through the locking cover and a pressing head, characterized in that the upper section of the interior of the valve body of the control valve is formed into an oil chamber having a center hole being extension from the center of the bottom section of the oil chamber for the combination of two oil guiding hole and the piston, and the upper end of the center hole is in combination with the valve rod module of the valve needle, and the top opening of the oil chamber is mounted with a valve plate and then is mounted with a valve cover, the valve rod passes through the elastic element connected to the upper section of the valve cover which at normal condition, pushes the valve rod such that a water stop ring at the smaller diameter of the lower end of the valve rod tightly seals with the lower end of the center hole of the valve body of the control valve.

Still another object of the present invention is to provide a control valve for auto-cut off valve faucet, wherein the locking cover is upwardly mounted with a connection section, forming into an external threaded section on the external wall of the cover, which could be screwed with the center hole of a decorative cover, and the pressing element passing through the upper section of the connection section with one slot allowing a screw at one side of the pressing head to be limitedly mounted.

Yet a ftirther object of the present invention is to provide a control valve for auto-cut off valve faucet, wherein the elastic element is a coil spring mounted onto the valve rod passes through the upper section of the valve cover and the screw thread on the upper section of the center hole of the valve rod is for the mounting of the fine thread at the center section of the valve needle, the valve rod is screwed to the internal screw hole at the lower end of the pressing element by the external thread at the upper end of the valve rod such that a adjustable slot at the end face of the head portion of the valve needle is corresponding to the center hole of the pressing element and the upper end of the coil spring urges the lower end of the pressing element and at normal condition, the valve rod is being pushed upward.

A further object of the present invention is to provide a control valve for auto-cut off valve faucet, which has a simple structure without a further oil cup module in controlling water output, thus, the cost of manufacturing of the valve is greatly reduced.

The foregoing object and summaiy provide only a brief introduction to the present invention. To filly appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG I is a perspective exploded view of the present invention.

FIG 2 is a perspective exploded view of the control valve of the present invention.

FIG 3 is a schematic sectional view of the present invention.

FIG 4 is a perspective view showing the faucet in accordance with the present invention.

FIG 5 is schematic view showing the water-delivery operation of the faucet in accordance with the present invention.

FIG 6is a schematic view showing the adjusting of water-delivery time of the faucet in accordance with the present invention.

DETMLED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are of exemplaiy embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplaiy embodiments of the invention.

Various changes to the described embodiments may be made in the function and anangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

The present invention is initially described in reference to FIG 1. FIG 1 illustrates an exploded perspective view of a control valve 20 for an auto-cut off faucet comprising a faucet body 10 having an water-outlet section 11 at a lateral side of the faucet body 10 in communication with a water cavity 12 formed at the interior of the faucet body 110, and a control valve 20 positioned within the cavity 12, a locking cover 13 covered the faucet body 10 at the top opening of the faucet body 10 to limit the control valve 20. The locking cover 13 is upwardly protruded a mounting section 131 having an external wall with external screw threads 132 which can be locked with a decorative cover 14.

Referring to FIG 2, there is shown a control valve 20 interiorly mounted with a valve rod 40 having an upper section mounted with an elastic element 60. The top end of the valve rod 40 is connected to a valve needle 50 which is mounted on the top thereof a pressing element 30. The pressing element passes through the locking cover 13 and is connected with a pressing head 15. Again, referring to FIG 2, which illustrates an exploded perspective view of the components of the control valve 20 in accordance with the present invention. In accordance with the preferred embodiment of the present invention, the control valve 20 is a cylindrical valve body having an upper section forming into an oil chamber 21, and the bottom of the valve body is downwardly extended to form a center hole 22, which is used for the mounting of the valve rod 40. The opening of the oil chamber 21 is covered with a valve plate 23, and the top end opening of the control valve 20 has internal threads 24 which could lock to a valve cover 25. The lower section of the center hole 22 is provided with a plurality of horizontal water guiding holes 26.

The pressing element 30 is substantially a cylindrical body having a section with a center hole 31. The lower end of the center hole 31 is an internal threaded hole 311, and the lower section of the pressing element 30 is externally protruded with an edge 32.

The valve rod 40 is a rod body having a lower section forming into a section with a small diameter 47. The middle section of the valve rod 40 is I. provided with two oil-guiding holes 42 which are in communication with the interior of the center hole 41. The middle section between the two oil-guiding hole 42 is provided with two C-shaped button 43 to limit a piston 45. The upper section of the center hole 41 on the valve rod 40 is screwed to a valve needle 50. The upper section of the valve rod 40 is mounted with an elastic element 60 and the upper end of the valve rod 40 is provided with external threads 46 which is screwed with the screw hole 311 at the lower end of the pressing element 30. Below the C-shaped button 43 and the lower section of the small diameter section 47, an 0-shaped rim 48 and a water blocking rim 49 are respectively mounted.

The valve needle 50 has a middle section which has threads 51 and the lower section of the valve needle 50 is formed into a sharp sloping section 52 of fine rod body. The upper endS of the valve needle 50 is a small diameter neck section 53 which is connected with an 0-shaped rim 54, and the end face of the valve needle 50 is recessed with an adjustable slot 55.

The elastic element 60 is a coil spring.

Referring to FIG 3, there is shown a sectional view of the control valve in accordance with the present invention. As shown in the figure, the valve rod 40 is downwardly passing through the valve cover 25, the valve plate 23 and the center hole 22 of the control valve 20 and is mounted to the r lower section by the 0-shaped rim 48 and is sealed with the middle hole 22 of the oil chamber 21 of the valve body of the control valve 20 such that the oil chamber 21 can accomiriodate the hydraulic fluid and the piston 45 can be mounted to the internal wall of the oil chamber 21. The valve plate 23 is used to cover the opening of the oil chamber 21, and the external threads of the valve cover 25 is screwed with the inner thread 24 of the opening at the upper end of the valve body of the control valve 20. The inner threads at the upper section of the middle hole 41 of the valve rod 40 is used for the locking of the valve needle 50 via the fine threads 51 at the middle section of the valve needle 50. The elastic element 60 is mounted at the external side of the upper section of the valve rod 40, and the external threads 46 at the upper end of the valve rod 40 is screwed with the internal screw hole 311 at the lower end of the pressing element 30 (as shown in FIG 2), such that the lower end of the pressing element 30 and the upper end of the elastic element 60 urges with each other. The elastic element 60 urges the lower end of the pressing element 30 so as to push up the valve rod 40 in normal situation such that the lower end of the valve rod 40 having mounted with the water-stopping rim 49 is sealed with the lower end of the center hole 22 to form the control valve 20.

After that, the control valve 20 is mounted to the water cavity 12 of the faucet body 10, and the pressing element 30 passes through the mounting section 131

U

of the locking cover 13 such that the locking center 13 is screwed at the top opening of the faucet body 10 to limit the control valve 20, and the center screw hole of the decorative cover 12 is connected at the external screw threads 132 of the mounting section 131 of the locking cover 13. Finally, the pressing element 30 passed through the mounting section 131 of the locking cover 13 and is mounted with a pressing head 15. A side screw 151 of the pressing head 15 is locked to the pressing element 30 to form a faucet as shovvn in FIG 4.

FIG 5 illustrates the operation in delivery of water by pressing. The water cavity or chamber 12 is divided by a separation diaphragm 121 to form an external water chamber 111 in communication with the lateral water delivery section 11. When the pressing head 15 is depressed, the pressing element 30 urges the valve rod 40 and the elastic element 60 to move downward, the water-blocking rim 49 at the lower end of the valve rod 40 disengage with the lower end of the center hole 22 of the control valve 20 such that water leading to the lower end of the faucet body 10 is controlled by the control valve 20 to enter the middle hole 22 of the valve body and via the water guiding hole 26 to the external water cavity 111 and water is delivered via the lateral side water outlet section 11. T he piston 45 within the oil chamber 21 is also lowered and the hydraulic fluid below the piston is compressed by the piston 45 to flow via the oil hole 42 to the middle hole 41 of the valve rod 40 and from the oil guiding hole 42 to the oil chamber 21 beyond the piston 21.

When the press head 15 is depressed, the elastic element 60 pushes upward the valve rod 40 to synchronously drive the piston 45 upward, the piston 45 compresses the fluid of the oil chamber 21 so that the fluid passes via the middle hole 41 of the valve rod 40 and is then from the oil guiding hole 42 into the oil chamber 21 at the lower side of the piston 45, and the piston rod is moved upward such that the water blocking rim 49 mounted at the lower end of the valve rod 40 and the lower end of the middle hole 22 of the valve body of the control valve 20 move back to the water blocking status, as shown inFIG3.

FIG 6 is a schematic view showing the adjusted water delivery time. A screw 151 at the pressing head 15 is released so as to lift up the press head 15.

A screw driver 80 is inserted into the middle hole 31 of the pressing element and urges the adjusting slot 55 at the upper end of the valve needled 50 connected to the valve rod 40, rotate the valve needle 50 such that the sharp sloping section 52 is lowered between the two oil guiding hole 42, forming into a small adjustment of the gap between the two oil-guiding hole 42 and changes the resistance of the two oil guiding hole 42 to the fluid. This will control the length of time of the elevated valve body 40 and therefore the water-delivety time of the water faucet is thus adjusted.

While the invention has been described with respect to preferred embodiment, it will be clear to those skilled in the art that modifications and improvements may be made to the invention without departing from the spirit and scope of the invention. Therefore, the invention is not to be limited by the specific illustrative embodiment, but only by the scope of the appended claims.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing iii any way from the spirit of the present invention.

Claims

I CLAIM: I. A control valve for auto-cut off faucet having a faucet body and a water chamber in communication at one side thereof with a water-outlet section for mounting with a control valve, and a locking cover and an opening on the faucet body being limited with the control valve, and the control valve including a valve body, a valve rod module in combination with a piston and a valve needle, the upper section of the valve rod mounted with an elastic element and the upper end of the valve rod mounted with a pressing element passing through the locking cover and a pressing head, characterized in that the upper section of the interior of the valve body of the control valve is formed into an oil chamber having a center hole being extension from the center of the bottom section of the oil chamber for the combination of two oil guiding hole and the piston, and the upper end of the center hole is in combination with the valve rod module of the valve needle, and the top opening of the oil chamber is mounted with a valve plate and then is mounted with a valve cover, the valve rod passes through the elastic element connected to the upper section of the valve cover which at normal condition, pushes the valve rod such that a water stop ring at the smaller diameter of the lower end of the valve rod tightly seals with the lower end of the center hole of the valve body of the control valve.
2. The control valve of claim I, wherein the locking cover is upwardly mounted with a connection section, forming into an external threaded section on the external wall of the cover, which could be screwed with the center hole of a decorative cover, and the pressing element passing through the upper section of the connection section with one slot allowing a screw at one side of the pressing head to be limitedly mounted.
3. The control valve of claim I or 2, wherein the elastic element is a coil spring mounted onto the valve rod passes through the upper section of the valve cover and the screw thread on the upper section of the center hole of the valve rod is for the mounting of the fine thread at the center section of the valve needle, the valve rod is screwed to the internal screw hole at the lower end of the pressing element by the external thread at the upper end of the valve rod such that a adjustable slot at the end face of the head portion of the valve needle is corresponding to the center hole of the pressing element and the upper end of the coil spring urges the lower end of the pressing element and at normal condition, the valve rod is being pushed upward.