Patent ID: 7996933

Claim:
A trap comprising: a chamber for holding a first liquid and having a bottom floor and an upper opening at which the first liquid can be delivered into the chamber; a discharge conduit having an outlet end located outside the chamber and an inlet end located inside the chamber and lower than the upper opening of the chamber, the inlet end terminating at a weir over which the first liquid in the chamber must flow to be discharged from the chamber through the discharge conduit; a baffle wall which extends upward from above the chamber floor to above the inlet end of the discharge conduit, the upper opening of the chamber and the inlet end of the discharge conduit being on opposite sides of the baffle wall; and a heat exchange conduit for passage of a second liquid, a portion of the heat exchange conduit being located in the chamber and lower than the weir, wherein the baffle wall substantially surrounds the inlet end of the discharge conduit, so that the first liquid delivered to the chamber at the upper opening passes downward and under the baffle wall before flowing upward and over the weir to be discharged from the chamber through the discharge conduit.