Improvements in or relating to fluid-flow control valves
US5595215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1995 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | May 24, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid flow control valve includes first and second electrically conductive body members separated by an electrically active separation member having electrical resistance. A valve actuation member is slidably located within the second body member, making a sliding electrical contact with the second body member. The valve actuation member can move from a first position spaced from the first body member to a second position electrically connecting the first body member with the second body member, thus forming a low resistance electrical connection. In its first position spaced from the first body member, the resistance of the electrical connection between the body members depends on the electrical resistance of the separation member. An electrical circuit, connected across the body and members including a current limiting resistor, forms a voltage splitter circuit with the separation member to enable an output voltage signal indicative of contact of the valve actuation member with the first body member to be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.