Pre-stressed gamma densitometer window and method of fabrication
US9791389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2016 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49865
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gamma densitometer window is provided along with a method of fabrication thereof. The window comprises a plate of non-metallic, preferably gamma transparent, material having a first face and a second face opposing one another and having an outer edge defined therebetween. The window further comprises a metallic frame member fitted around the outer edge of the plate and adapted to pre-load the plate with a compressive stress that is sufficiently high such that the sum of the compressive stress, tensile stress and shear stress components generated in the plate under high-pressure conditions is always compressive. The method of fabrication shrink fitting the metallic frame member around the outer edge of the plate at a shrink-fit temperature such that the metallic frame member applies a compressive stress to the plate at any temperature below the shrink-fit temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.