Self metering foam proportioning system
AssigneeWilliams Fire & Hazard Control, Inc.
InventorsDennis W. Crabtree, Duane J. Brinkerhoff, Eric LaVergne
Life of this patent
Estimating the term…
Abstract
A fire fighting fluid proportioning system and method including a fire fighting fluid conduit in fluid communication with a fire fighting fluid regulating valve and a venturi, the venturi in fluid communication with a valve source of fire fighting foam concentrate, and having a pilot valve connected directly or indirectly to the regulating valve and the concentrate source valve and adapted to adjust, directly or indirectly, the regulating valve and the source valve in response to a sensed indicia of fire fighting fluid pressure in the conduit.
Claims16
A fire fighting foam proportioning system, comprising:
- a fire fighting fluid conduit having a fire fighting fluid regulating valve and a foam concentrate discharge;
- the concentrate discharge in fluid communication with a valved source of fire fighting foam concentrate;
- a pilot valve connected to the regulating valve and the concentrate source valve and adapted to adjust the regulating valve and the source valve in response to a sensed indicia of fire fighting fluid pressure in the conduit;
- and
- wherein adjusting the regulating valve includes adjusting fire fighting fluid flow through the valve by opening or closing regulating valve structure.
A fire fighting foam proportioning system, comprising:
- a fire fighting fluid conduit having a fire fighting fluid regulating valve and a foam concentrate discharge;
- the concentrate discharge in fluid communication with a valved source of fire fighting foam concentrate;
- a pilot valve connected to the regulating valve and the concentrate source valve and adapted to adjust the regulating valve and the source valve in response to a sensed indicia of fire fighting fluid pressure in the conduit;
- and
- wherein the sensed indicia includes fire fighting fluid pressure downstream of the regulating valve.
A method for proportioning fire fighting foam concentrate, comprising:
- discharging fire fighting foam concentrate into a fire fighting fluid conduit proximate a fire fighting fluid regulating valve;
- regulating fire fighting fluid flow in the conduit with the valve in accordance with a sensed indicia of fire fighting fluid pressure;
- automatically metering foam concentrate into the conduit in accordance with regulated fire fighting fluid flow in the conduit;
- and
- wherein regulating fire fighting fluid flow in the conduit with the valve includes adjusting a valve opening in the conduit through which the fire fighting fluid flows.
A method for proportioning fire fighting foam concentrate, comprising:
- discharging fire fighting foam concentrate into a fire fighting fluid conduit proximate a fire fighting fluid valve;
- regulating fire fighting fluid flow in the conduit with the valve in accordance with a sensed indicia of fire fighting fluid pressure;
- automatically metering foam concentrate into the conduit in accordance with regulated fire fighting fluid flow in the conduit;
- and
- wherein the sensed indicia of fire fighting fluid pressure includes sensed indicia downstream of the discharge.
Dependencies are inferred from the claim text.