In-line flow switch using magnetic forces

Details In-line flow switch using magnetic forces In-line flow switch using magnetic forces

H - Electricity

01

H

H01H 35/24 (2006.01) F16L 55/07 (2006.01) H01H 35/40 (2006.01) H01H 36/00 (2006.01)

Patent

CA 2387775

A flow switch for a high pressure washing system or other flow-related system is disclosed. The flow switch switches from an open to a closed position in the presence of adequate flow in a water or other fluid-carrying pipe. The flow switch includes a housing with an inlet port and an outlet port which allows fluid to flow through the housing. Within the housing is a plunger with an attached magnet. The plunger is responsive to fluid flow. A retainer ensures that the plunger remains within the housing. A sensor is situated proximate to the housing. A sensor magnet is placed in position near the sensor and opposes the plunger magnet. When there is no flow within the housing, the plunger is at its rest position as it is repelled by the sensor magnet. When a threshold rate of flow is present, the pressure from the flow overcomes the repellant force of the magnets and the plunger is moved to its secondary position. In this position, the plunger magnet trips the sensor.

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