Patent ID: 6196259
Filing Date: 2001-03-06
Classification: G05D,Y10T

Abstract:
A fluid valve for controlling flow of a fluid from an upstream region to a downstream region, the fluid valve comprising:a generally cylindrical housing having a fluid entrance and a fluid exit;a fluid entry member having a generally cylindrical sidewall formed with at least one regulating aperture for receiving fluid from the upstream region, the side wall further formed with a second aperture for receiving fluid from the upstream region, the fluid entry member movably disposed within the housing such that the at least one regulating aperture has a total area exposed to the upstream region sufficient to allow a substantially constant rate of fluid flow through the fluid valve over a range of pressure differentials between the upstream region and the downstream region; anda cap having a first end and a peripheral sidewall, the first end coupled to an end of the fluid entry member opposite the housing, the peripheral sidewall engaging the housing and preventing fluid flow through the valve when the difference in fluid pressure between the upstream region and the downstream region exceeds a desired value, andwherein the second aperture is positioned closer to the cap than the at least one regulating aperture.