Passive overpressure and underpressure protection for a cryogen vessel
US8820347B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 2009 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7784
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In a magnet system for MRI imaging comprising a superconducting magnet mounted within a cryogen vessel, apparatus is provided for controlling egress of cryogen gas from the cryogen vessel. The apparatus comprises a controlled valve linking the interior of the cryogen vessel to a gas exit path; and a controller arranged to control the valve. The valve is arranged such that a gas pressure in the cryogen vessel exceeding a gas pressure in the gas exit path acts on the valve to open the valve and allow venting of cryogen gas. The valve is also arranged such that a gas pressure in the cryogen vessel inferior to a gas pressure in the gas exit path acts on the valve to urge it closed, so restricting flow of gas into the cryogen vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.