Patent ID: 7628169
Filing Date: 2009-12-08
Classification: F16K,Y10T

Abstract:
1. A safety relief valve comprising: a) a body comprising a chamber therein and an inlet and an outlet, the inlet comprising an inlet valve seat; b) a disk member closable on the inlet valve seat; and c) a mechanism in the body biasing the disk member to rest on the inlet valve seat with a set force such that when the pressure in the inlet exceeds a set pressure resulting from the set force, the disk member is lifted from the inlet valve seat, the disk member and inlet being configured to provide a huddling chamber, the mechanism comprising a combination of a coil spring and one or more disk springs stacked in series with the coil spring, wherein the spring rate of the coil spring is less than the spring rate of the lowest spring rate of the one or more disk springs.