Controller for well installations
US4532952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1982 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | May 14, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8158
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A controller for well installations which responds to external signals originating from system monitors. This response may be modified by operator inserted delays or may be utilized to carry out a SET function wherein all signals are rejected until an externally derived RESET signal is received. A priority protocol is provided with respect to the SET and RESET functions. The circuit of the controller is housed within a circuit housing which includes a polymeric seal and operates in conjunction with a sealed keypad. This circuit housing is incorporated within a principal housing and a positive pressure is maintained within that principal housing to assure the integrity thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.