Patent ID: 8454910
Filing Date: 2013-06-04
Classification: B01J,B01L,G01N,H05B,Y10T

Abstract:
1. A compression cap for use as a pressure-relief valve on an open-ended sample recipient during decomposition or extraction of a sample material, the compression cap comprising: a casing having an internal cavity and a fluidly communicating aperture at one end of the casing; a spring located within the internal cavity; and a piston exerting a biasing force on the spring, the piston upwardly movable through a lower part of the internal cavity away from the aperture to enable fluid to escape from the sample recipient when a pressure inside the recipient rises above a predetermined threshold, and the pressure inside the recipient dropping below the predetermined threshold as a result of the fluid escaping through the aperture causing the piston to be downwardly movable through the aperture to automatically and hermetically close the aperture.