Differential pressure signal device
US4365582A · kind A · utility
6Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1980 |
| Grant date | Dec 28, 1982 |
| Priority date | — |
| Expiry date | Nov 24, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S116/25
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A differential pressure signal device employing an audible vibratory reed assembly having the property of being activated automatically upon being subjected to a predetermined energy level. The assembly is preferably all plastic and includes a unique rockable flapper valve that is automatically activated when the differential in pressure between two chambers reaches a predetermined level. The opening of said valve provides a large inrush of air that activates and operates the audible vibration of said reed until the differential in pressure is lowered below said predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.