Glass ball safety valve
US10955062B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2017 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Dec 25, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2223/035
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A glass ball safety valve includes: a housing including a valve passage connecting a first and second port; a valve element provided in the housing so as to close the passage, the element being movable in an open direction so as to open the passage; a biasing spring configured to bias the element in the open direction; a glass ball provided in the housing so as to support the element against biasing force of the biasing spring with a space between the element and the housing in the open direction, the glass ball including a longitudinal-direction intermediate portion that breaks at a predetermined temperature, the glass ball in a broken state allowing a movement of the valve element in the open direction; and a holding body provided in the housing and holding at least one of a first longitudinal-direction end-side portion and second longitudinal-direction end-side portion of the glass ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.