Toroidal inductor for a pressure sensor in a submersible pump
US4492523A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1984 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Feb 10, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B47/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pressure compensator for a submersible pump has features to prevent damage while lowering the pump into the well. The pressure compensator includes a bellows located below the pump. A retainer will mechanically retain the bellows in a position other than its maximum lubricant volume position while lowering the pump assembly into the well. Once the motor begins operation, the retainer will release the bellows for normal movement. The retainer inlcudes a linkage member that is connected to the top of the bellows and extends upwardly to the drive shaft. A latching device latches the linkage member to the drive shaft. A reverse threaded portion in the latching device unscrews the latching device from the linkage member once the motor begins to rotate. A pressure sensing assembly is coupled between the pressure compensator and the motor. A toroidal inductor in the sensing assembly provides a passage for the linkage member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.