Safety module
US5811894A · kind A · utility
11Cited by
17References
16Claims
0Family size
Inventors
Key dates
| Filing date | Jul 17, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jul 17, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D1/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A safety module which is intended to be used in an oil or gas production installation and to be lowered to a required depth with an electrically operable tool connected thereto, and which comprises a housing (2), a pressure sensitive switch (3) and a temperature sensitive switch in the housing which are adapted to switch at predetermined pressure and temperature values respectively, in which the pressure sensitive switch and the temperature sensitive switch only allow an electrical command signal to be conveyed to the tool when the pressure and temperature both reach the predetermined pressure and temperature values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.