Ranger/hybrid automatic self-metering nozzle, with ratio-selectable and flow meter features
AssigneeWilliams Fire & Hazard Control, Inc.
InventorsDennis W. Crabtree, Dwight P. Williams
Life of this patent
Estimating the term…
Abstract
A self-metering, automatic (i.e. pressure regulating) industrial-scale fire fighting nozzle, with or without self-eduction, for self-metering a concentrate in accordance with varying liquid flow through the nozzle occasioned by the pressure regulating, with additional features of having a “ratio selectable” means for self-metering for different selected additive concentrations or mixing ratios and of having a mechanical flowmeter.
Claims14
A self-metering automatic industrial-scale fire fighting nozzle, comprising:
- an additive passageway within the nozzle in fluid communication with a fire-fighting liquid conduit within the nozzle, the conduit having a discharge orifice that varies in size with supply pressure of the liquid, at least for part of a flow range of the nozzle;
- and
- structural elements defining a variable opening associated with the additive passageway, the elements structured in combination to automatically vary the opening size in response to variations in size of the discharge orifice.
A self-metering automatic industrial-scale fire fighting nozzle, comprising:
- an additive passageway within the nozzle in fluid communication with a fire-fighting liquid conduit within the nozzle, the conduit having a discharge orifice that varies in size with supply pressure of the liquid, at least for part of a flow range of the nozzle;
- and
- a valve associated with the additive passageway, the valve structured to automatically vary in accordance with variations of the discharge orifice size.
A self-metering automatic industrial-scale fire fighting nozzle, comprising:
- an additive passageway within the nozzle in fluid communication with a fire-fighting liquid conduit within the nozzle, the conduit having a discharge orifice that varies in size with supply pressure of the liquid, at least for part of a flow range of the nozzle;
- and
- means for variably occluding the additive passageway in conjunction with variations of the discharge orifice size.
A self-metering automatic industrial-scale fire fighting nozzle, comprising:
- an additive passageway within the nozzle in fluid communication with a fire-fighting liquid conduit within the nozzle, the conduit having a discharge orifice that varies in size with supply pressure of the liquid, at least for part of a flow range of the nozzle;
- and
- an adjustable opening in the additive passageway calibrated to automatically adjust in response to variations of the discharge orifice size.
A method, comprising:
- automatically metering a preselected ratio of additive into an at least partially automatic industrial-scale fire fighting nozzle, including adjusting at least one occluding element in an additive passageway within the nozzle in fluid communication with a fire fighting liquid conduit within the nozzle in accordance with a varying discharge orifice of the fire fighting liquid conduit.
A method, comprising:
- automatically metering a preselected ratio of additive into an at least partially automatic industrial-scale fire fighting nozzle, including occluding an additive passageway within the nozzle in fluid communication with a fire fighting liquid conduit within the nozzle in accordance with a varying discharge orifice of the fire fighting liquid conduit.
A method, comprising:
- automatically metering a preselected ratio of additive into an at least partially automatic industrial-scale fire fighting nozzle, including, in a passageway for additive located inside of the nozzle body, and valving the passageway in tandem with a varying discharge orifice within the fire fighting liquid conduit.
Dependencies are inferred from the claim text.