Thermally-sensitive safety device for gas tubing
US6820633B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7727
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is to provide a thermally-sensitive safety device for gas tubing including a main body provided with an inlet, an outlet and a gas passage communicated with said inlet and said outlet, and a thermally-sensitive control valve mounted in the gas passage. The control valve has a ball, which is normally biased by a spring to stop against a thermally-sensitive member, and a bushing with through hole in alignment with the ball. The thermally-sensitive member melts while ambient temperature is higher than the melting point thereof, whereby said ball is biased by said spring to contact against and seal the through hole of the bushing such that the gas passage is blocked off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.