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US 5,960,887 AGranted
By-pass eductor
AssigneeWilliams Fire & Hazard Control, Inc.
InventorDennis Crabtree
Life of this patent
Estimating the term…
Abstract
An improved additive eductor for supplying additives, including foam concentrates and thixotropic foam concentrates, into a hand line or waterline for supplying a nozzle used for fire fighting operations wherein the additive eductor can be operated in either eductive or non-eductive by-pass mode and further comprising in a prefered embodiment a back-flow preventative metering valve attached to a additive port.
Claims9
An improved additive eductor assembly for fire fighting mechanisms comprising:
- a fluid eduction passageway having a venturi in fluid communication with an additive fluid;
- and
- a plurality of valvable bypass fluid passageways positioned around the eduction passageway, said bypass and eduction passageways being dimensioned in combination to reduce pressure loss from flow through the assembly to less than 10 pounds per square inch when the bypass passageways are valved open.
Dependencies are inferred from the claim text.