Electrically operated proportionate valve
US3991972A · kind A · utility
32Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Apr 21, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/025
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve assembly having a passage therethrough for passing a fluid. Has a movable member adapted for variably constricting the passage in proportion to an applied voltage. The assembly includes an expansible electrical heater connected to the movable member which keeps the passage constricted. The wire expands upon passage of electric current therethrough to slacken whereupon, a bias means connected to the movable member acts thereupon to open the passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.