Heat activated plunger
US4088192A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Jul 16, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1987
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A heat actuated valve comprises a base adapted to be mounted on a fire extinguisher container. The base includes a passsage communicable with the container interior. A pair of stop fingers extend forwardly from the base. A fusible element interconnects the stop fingers. The base, stop fingers and fusible element are of one-piece, integral construction. A plunger is slidably mounted in the passage and includes a passage-blocking portion which blocks the passage when the plunger abuts the stop fingers during a fire sensing mode of operation. The plunger is slidable rearwardly to shift the passage-blocking portion to a first passage-opening position to allow the container to be filled. The plunger is operable, in response to melting of the fuse, to spread the stop fingers apart and travel forwardly sufficiently to shift the passage-blocking portion to a second passage-opening position, enabling the container contents to be discharged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.