Patent ID: 9455483
Filing Date: 2016-09-27
CPC Classification: G01F,G01N,H01P,Y10T

Claim Text:
1. A gamma densitometer window, comprising: a plate of non-metallic material having a first face and a second face opposing one another and having an outer edge defined therebetween; and a metallic frame member fitted around the outer edge of the plate and mounted to a pressure bearing wall for confining a pressurized fluid, the metallic frame member being adapted to hold the plate at a position separated from the pressure bearing wall to self-energize engagement of the metallic frame member with the plate by utilizing the pressure of the pressurized fluid to compress the metallic frame member against the plate, the plate being pre-loaded with a compressive stress that is sufficiently high such that a sum of the compressive stress, tensile stress and shear stress components generated in the plate under high-pressure conditions is always compressive.