Patent ID: 9261887
Filing Date: 2016-02-16
CPC Classification: G05D,Y10T

Claim Text:
1. A pressure balance valve being fixed on a water supply device and comprising: a receiving chamber being cylindrical and including an external cold-water inlet and an external hot-water inlet which are axially defined along an inner wall of the receiving chamber so that cold water and hot water flow into the receiving chamber from the external cold-water inlet and the external hot-water inlet, the receiving chamber also including an external cold-water outlet and an external hot-water outlet which are axially formed on the peripheral wall thereof so that the cold water and the hot water flow out of the external cold-water outlet and the external hot-water outlet from the receiving chamber; a valve core including a pressure sensing fence radially extending thereon, a first ring portion and a second ring portion which axially extend along two sides thereof; between the first ring portion and the pressure sensing fence being defined a cold-water pressure cavity; between the second ring portion and the pressure sensing fence being defined a hot-water pressure cavity; the first ring portion having an internal cold-water inlet and an internal cold-water outlet which communicate with each other via the cold-water pressure cavity, wherein the internal cold-water inlet communicates with the external cold-water inlet, and the internal cold-water outlet communicates with the external cold-water outlet; the second ring portion having an internal hot-water inlet and an internal hot-water outlet which communicate with each other via the hot-water pressure cavity, wherein the internal hot-water inlet communicates with the external hot-water inlet, and the internal hot-water outlet communicates with the external hot-water outlet; the first ring portion also having at least one first fixing slot defined on an outer wall thereof; and the second ring portion also having at least one second fixing slot formed on an outer wall thereof; at least one first resilient loop fitted in the at least one first fixing slot; at least second resilient loop fitted in the at least one second fixing slot; wherein among the inner wall of the receiving chamber, the outer wall of the first ring portion, and the outer wall of the second ring portion is defined a gap; and after the at least one first resilient loop and the at least one second resilient loop are mounted, they are pressed by water pressure to cause a deformation so as to fill the gap.