Flow failure detector
US4937558A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and system for detecting the existance of fluid flow from a fluid source to a pipeline includes a cylinder with an inlet at a first end and a lateral outlet. A piston in the cylinder is moveable from a no-flow position abutting the first end in which it is maintained by a spring, to a flow position in which the piston at least partly opens the lateral outlet, by fluid flowing from the inlet to the lateral outlet. A magnetic switch detects the no-flow position of the piston, and actuates a radio transmitter to send a no-flow condition alarm. The device is used to detect interruptions in the supply of additives to oil and gas pipelines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.