Patent ID: 7981182

Claim:
A labyrinth box comprising: a single unitary piece housing structure having an open end spaced from a substantially closed end by at least one side wall, the housing structure defining a first cavity having a first longitudinal length extending from the substantially closed end to the open end of the housing structure and a second cavity having a depth extending substantially parallel with the longitudinal length of the first cavity and from the substantially closed end to the open end of the housing structure, the housing structure having an inlet port located at the substantially closed end of the first cavity and an outlet port located in the second cavity; and a cover located adjacent and sealing the open end of the housing structure, the cover including an inner surface facing the housing structure, the cover further including a divider extending from the inner surface of the cover into the first cavity of the housing structure to divide the first cavity into a first chamber and a second chamber, the divider extending along a substantial portion of the longitudinal length of the first cavity such that a longitudinal axis of the first chamber and a longitudinal axis of the second chamber are each substantially parallel with the longitudinal axis of the first cavity, wherein the housing structure is configured such that the second cavity forms a third chamber that is in fluid communication with the second chamber at a location opposed to the inlet port and closer to the cover than the inlet port, and the divider extending from the inner surface of the cover into the first cavity includes at least one surface that is positioned at an angle with respect to the longitudinal axis of the first chamber such that when the box is oriented in a configuration in which the cover extends vertically and the longitudinal axis of the first chamber extends horizontally, fluid will drain off of the divider due to the action of gravity and the angle of the divider surface.