Patent ID: 9121523
Filing Date: 2015-09-01
Classification: B25B,F16K,Y10T

Abstract:
1. A pressure relief valve for venting a pressure vessel containing a pressurized fluid, comprising: a mount, said mount having a lower portion adapted for mounting to the pressure vessel, a passageway for venting fluid therethrough, and an upper portion defining a first mating structure circumscribing said passageway; a valve seat supported on said mount about said passageway; a poppet matable with said valve seat to occlude said passageway and disrupt a flow of fluid therethrough, said poppet having an open position spaced from said valve seat and a closed position in abutting said valve seat; a housing having a first portion defining a second mating structure complementary to said first mating structure, and at least one vent to atmosphere configured such that, when said poppet is in said open position, said passageway is in fluid communication with said atmosphere, and an opening for admitting passage of a tool; a spring retainer having a mating structure mechanically interlockable with the tool, and a flange; and a compression spring mounted within said housing and captured at one end by said housing and at an opposite end by said flange of said spring retainer, said compression spring biasing said poppet from an open position spaced from said valve seat toward a closed position in abutting relationship with said valve seat, seat compression spring having an axis and said opening of said housing being aligned with said axis.