Fire-extinguishing system with servo motor-driven foam pump
US8297369B2 · kind B2 · utility
10Cited by
171References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Feb 27, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C5/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Embodiments of the invention provide a fire-extinguishing system for injecting foamant into a stream of water. The system can include a flow meter determining a flow rate of the stream of water and a foam pump having an inlet coupled to a supply of foamant and an outlet coupled to the stream of water. The system includes a servo motor driving the foam pump. The servo motor includes a sensor used to determine a rotor shaft speed and/or a rotor shaft torque. A controller can control an operating speed of the servo motor using closed-loop control depending on the flow rate and the rotor shaft speed and/or the rotor shaft torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.