Patent ID: 6202676
Filing Date: 2001-03-20
Classification: F16K,G05D,Y10T

Abstract:
A liquid level control unit for maintaining liquid ina container at a predefined level comprising:a magnetic actuator device having:a) a displacement member locatable in a container having a liquid wherein the displacement member is at least partly immersible in the liquid;b) a support structure mountable over the container, the support structure having a support mechanism connected to the displacement member wherein the displacement member is supportable in the liquid in the container by the support mechanism with the displacement member displaceable relative to the support structure when the liquid level in the container changes, and wherein the support mechanism includes a spring assembly wherein at least a portion of the displacement member engages the spring assembly;c) a first magnetic assembly connected to the displacement member and moveable with the displacement member;d) an actuator mechanism mounted on the support structure the actuator mechanism having an arm member and a pivot assembly;e) a second magnet assembly mounted on the arm member proximate to the first magnet;f) a shield structure mounted to the support structure between the first magnet assembly and the second magnet assembly and isolating the first magnet assembly from the second assembly, wherein displacement of the first magnet assembly is magnetically translated in a corresponding displacement of the second magnet assembly and the arm member; and,g) a valve assembly operably connectable to a liquid supply control mechanism, the valve assembly having a displaceable actuated member contacting the arm member of the actuator mechanism wherein liquid is supplied to the container on select actuation of the actuated member in response to changes in the liquid level in the container.