Patent Application
20080230735
(a) Field of the Invention
The present invention is related to a control valve body, and more particularly, to one comprised of metal pipe (e.g., copper) clad in an outer layer (e.g., plastic) and molded in a simple process by bending the metal pipe in multiple times to provide a hard-wearing and production cost saving control valve body construction due to the inherited heat resisting and durable properties of metal pipe.
(b) Description of the Prior Art
Conventional control valve body adapted in a mixer of hot water and cold water is usually made of metal by casting. The control valve body is mounted in a tap to achieve regulating water temperature, water volume delivered, and on-off functions by turning the tap. Whereas the control valve body is made using a casting method, water way and valve chamber of a hollow molding cavity needed inside the control valve body are cast by having sand core placed at where the hollow molding cavity is located before pouring the metal liquid. The difficulties involved in locating the sand core during the process affect production speed and rate of conformity; and easy molding of multiple channels to deliver cold water, hot water and mixed water must be provided in the control valve body is prevented when the conventional metal casting method is used. Furthermore, the cast control valve body needs subsequent grinding and polishing processes to consume much more labor, time, and money while resultant metal dust can present serious problem to the environment.
To correct these problems, an improvement titled “PVC Molded Hot & Cold Water Mixer”, No. 284265 published in Taiwan Utility Patents Gazette teaches a manufacturing of a control valve body entirely using an injection molding process. Wherein, hollow plastic components including water supply lines, water inlet and outlet, and valve chamber are molded by injection before being assembled into the control valve body, the control valve body is then placed in a mold to be clad with an out layer also using the injection molding method, and multiple pores are respectively molded at where in symmetric to those parts of the valve chamber, hot and cold water inlets and outlets, and water supply lines that warrant external communication. However, the plastic material is subject to serious heat impacts when both of the hot water and the cold water directly contact the plastic water supply lines. Since the capability of the plastic material to withstand heat impact is weaker thus to compromise the service life of the plastic control valve body. Furthermore, chemicals can be dissolved in hot water to contaminate water quality if higher temperature of hot water is delivered through the water supply line for a longer time.
The primary purpose of the present invention is to provide a control valve body comprised of metal pipe (e.g., copper) clad in an outer layer (e.g., plastic) and molded in a simple process by bending the metal pipe in multiple times that is hard-wearing and production cost saving due to the inherited heat resisting and durable properties of metal pipe.
To achieve the purpose, the present invention includes a valve seat containing one or a plurality of metal pipe and one or a plurality of valve chamber; both ends of the metal pipe are respectively disposed with a water inlet and a water outlet; both of the water inlet and the water outlet are connected through the valve chamber; one or a plurality of curvature and the valve seat is clad with an outer layer so to prevent chemicals from being leached to contaminate water quality since hot water delivered contacts the metal pipe, instead of plastic pipe as found with the prior art.
Referring to
As a preferred embodiment of the present invention illustrated in
A control member 2 is connected to the valve chamber 131 as illustrated in
Now referring to
As illustrated in
Meanwhile, the valve opening 21 is partially overlapped with both water outlets 15 each of the cold water and hot water metal pipes 111, 112 as well as the water inlet 14 of the water supply metal pipe 113 so to allow both of the cold water and the hot water respectively delivered through the cold water and the hot water metal pipes 111, 112 to enter into the valve chamber where both of the cold water and the hot water are mixed before being delivered through the water supply metal pipe for use as illustrated in
Furthermore, the valve chamber 13 may contain one cold water metal pipe 111, one hot water metal pipe 112, and two water supply metal pipes 113 as illustrated in
It is to be noted that the preferred embodiments disclosed in the specification and the accompanying drawings are not limiting the present invention; and that any construction, installation, or characteristics that is same or similar to that of the present invention should fall within the scope of the purposes and claims of the present invention.
