Fire extinguishers – Fluid systems – Plural source – mixing in transit
Patent
1993-05-04
1994-08-09
Gluck, Richard E.
Fire extinguishers
Fluid systems
Plural source, mixing in transit
169 33, 417 76, 417234, 417503, A62C 1500, A62C 3112
Patent
active
053357345
ABSTRACT:
A pump apparatus dispenses a liquid and additive mixture and has a pump cylinder with intake and discharge ports with associated valves. An additive supply communicates with the pump cylinder to supply additive with liquid drawn into the pump during an intake stroke prior to a discharge stroke during which a mixture of additive and liquid is discharged from the pump. The additive is mixed in the liquid prior to passing into the intake port and is metered to attain the desired concentration. An aerating nozzle receives mixture discharged from the discharge port to produce foam for various applications, such as fire fighting. The aerating nozzle has a restrictor orifice located adjacent and upstream from air entainment opening in the nozzle. The restrictor orifice can be a simple non-tapered cylindrical passage, but for improved foam generation, the orifice can be a diverging passage with a step between inlet and outlet portions of the passage.
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Maverick Foam Vest System Brochure (See above U.S. Patent 5,137,094). Date of publication unknown.
Gilbert Barry G.
Gowan George R.
Scott Blayney J.
Gluck Richard E.
Scott Plastics Ltd.
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