Fluid switch
US4071047A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1975 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Sep 30, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86879
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid switch formed of a housing having at least one inlet port to which pressure is applied and at least one outlet port. An inlet conduit disposed within the housing is coupled at one end to an inlet port so that fluid flows therethrough in laminar flow. An outlet conduit is disposed within the housing and is aligned with the inlet conduit. One end of the outlet conduit is coupled to an outlet port. The other ends of the inlet and outlet conduits are spaced from each other by an amount which is less than the critical amount required for the laminar flow to change to turbulent flow. A piston having no fluid sealing means is disposed in the spacing between the conduits and includes a transverse fluid channel which is selectively aligned with the conduits in accordance with the diplacement of the piston. An actuator is provided to exert a force on the piston so as to displace same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.