Patent ID: 6138705
Filing Date: 2000-10-31
Classification: G05D,Y10T

Abstract:
A pressure balance valve for use on a pipeline, comprising:a valve embodiment;a sleeve;a balance valve; anda sealing cap;said valve embodiment being of an H-shaped structure and having a vertically extended right and left portion; said vertical right portion having an internally threaded cold water inlet at a top end thereof;said vertical left portion of said valve embodiment having an internally threaded hot water inlet at a top end thereof;a balance valve chamber extending horizontally at a central position between said vertical right portion and said vertical left portion;said balance valve chamber having a cold water inlet space and a hot water inlet space at each end thereof;each end of said balance valve chamber communicating with a cold water outlet space and a hot water outlet space respectively;said cold water outlet space having an internally threaded cold water passage on a bottom wall thereof;said hot water outlet space having an internally threaded hot water passage on a bottom wall thereof;said valve embodiment having an internally threaded sealing hole at one side of said right portion thereof, communicating with said cold water outlet space;said sleeve being a hollow cylindrical tube;said sealing cap being a 3-stage cylinder including a large hexagonal driving end, a medium externally threaded locking section, and a small internally threaded connection end;said cold water inlet and hot water inlet being engaged with a cold water supplying pipe and a hot water supplying pipe respectively;said cold water outlet and hot water outlet being engaged with a cold water discharging pipe and a hot water discharging pipe respectively;said balance valve being housed in a hollow tubular interior of said sleeve;said sealing cap being lockedly engaged with said sealing hole of said valve embodiment;said sleeve being housed in said balance valve chamber of said valve embodiment;wherein said pressure balance valve is characterized by that:said sleeve has three spaced ring grooves on an external surface thereof for location of sealing rings therein; between every two of said ring grooves of said sleeve are disposed 4 equally spaced cold water inlet holes or 4 equally spaced hot water inlet holes respectively; and at one end of said sleeve is provided with an externally threaded retaining section;said balance valve has a cold water hole at one end and a hot water hole at the other end and a partition board is placed at the middle thereof, on an external surface of said balance valve and in alignment with said partition board is disposed a ring of groove for location of a sealing ring; next to one side of said ring of groove is disposed a peripheral cold water notch and a peripheral hot water notch to the other side of said ring of groove;in said cold water notch are disposed 4 equally spaced cold water inner inlets and 4 equally spaced hot water inner inlets in said hot water notch;said sealing cap has a small internally threaded tubular connection end and next to said threaded connection end are disposed 4 equally spaced water outlets communicating with said tubular connection end;whereby said retaining section of said sleeve is in locking engagement with said internally threaded connection end of said sealing cap with said balance valve housed in said tubular sleeve and said sealing cap is lockedly engaged with said sealing hole of said valve embodiment after said balance valve along with said sleeve is disposed inside said balance valve chamber via said sealing hole; permitting said sleeve and balance valve to be readily taken out for cleansing purpose and preventing cold water and hot water from mutually penetrating with ease.