Foam concentrate proportioning system and methods for rescue and fire fighting vehicles
US6684959B1 · kind B1 · utility
29Cited by
46References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Sep 14, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C27/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A system and method of maintaining a desired additive to water ration in a fire-fighting system including a water flow sensor configured to measure the water flow rate, a water pump, a hydraulic pump, a linear hydraulic cylinder driven by the hydraulic pump, an additive pump mechanically coupled to the linear hydraulic cylinder; and a pump displacement sensor configured to sense the position of the additive pump, the pump displacement sensor being in communication with the water flow sensor to maintain a pre-determined ratio of additive to water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.