Differential pressure switch
US3946176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Dec 4, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A differential pressure module is secured in switching relation to the actuating plunger of an electrical switching mechanism. Comprising the differential pressure module are two piston/cylinder assemblies connected together in back-to-back configuration by secured cross members forming a floating yoke. Each of the assemblies includes a diaphragm in communication with a separate oppositely directed fluid inlet and through which a force differential effective from the separate forces acting in opposition to each other is applied via the yoke against the switch actuator. A cast body intervening between the assemblies defines the fluid inlets while maintaining the pressure of each isolated from the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.