US Patent 11834937 Systems and methods for a bypass plunger

A plunger assembly includes a cage having a body extending from a first end to a second end, the cage having a bore extending from the first end to the second end and one or more radial openings. The plunger assembly also includes a stinger positioned at least partially within the bore, the stinger being axially movable along an axis aligned with the bore between an open position and a closed position, wherein at least a portion of the stringer blocks at least a portion of the one or more radial openings in the closed position. The plunger assembly further includes a magnetic positioning system configured to hold the stinger in at least one of the open position or the closed position, the magnetic positioning system having one or more magnetic components that interact with at least one magnetic portion of the stinger.