Back to results
US 4,446,892 AGranted
Method and apparatus for monitoring lengths of hose
AssigneeMaxwell, Ltd.
InventorAnthony J. Maxwell
Life of this patent
Estimating the term…
Abstract
A fluid transport hose having two or more plies comprising a sensing element located between the plies, the sensing element being responsive to the electromagnetic properties of fluid between the plies as a result of a rupture of the inner ply. Alternatively, the sensing element may be adapted to respond to the failure of an inner ply of the hose by presenting an open circuit.
Claims7
A hose for transporting fluid having electromagnetic properties, said hose having at least two plies between which fluid normally is not present;
- a sensing element between the plies and forming part of a detection circuit operable to signal the presence of fluid between the plies as a result of failure of one of the plies;
- and a particulate material located between the plies, the sensing element being responsive to at least one of the fluid's electromagnetic properties to initiate operation of the said circuit, and the particulate material enhancing the said at least one electromagnetic property of the fluid to which the sensing element is responsive.
Dependencies are inferred from the claim text.