Patent ID: 7914671
Filing Date: 2011-03-29
Classification: B01D,B23Q,C02F

Abstract:
1. An apparatus for removing buoyant pollutants having oil and debris atop a body of a coolant, the apparatus comprising: a pollutant collecting device including a hollow tub and a collecting module, the collecting module being partially received in the hollow tub and slidable relative to the hollow tub; a bi-directional pump communicating with the hollow tub; and a controlling module configured for controlling the bi-directional pump to draw coolant, oil or a mixture of coolant and buoyant pollutants into the hollow tub or out of the hollow tub; wherein the controlling module is a pressure switch connected to the bi-directional pump for controlling the bi-directional pump to propel a liquid of coolant, oil or a mixture of coolant and buoyant pollutants in a first direction or in a second direction opposite to the first direction according to a pressure of the liquid in the bi-directional pump; the controlling module comprises a case, an elastic seal, a movable member, a resilient member, and a controlling circuit; a sealed cavity and an open cavity defined in the case, and the elastic seal is disposed between the sealed cavity and the open cavity; the movable member is disposed in the sealed cavity and includes a bottom portion abutting the elastic seal and an actuating piece disposed on the bottom portion; a first end of the resilient member abuts the bottom portion, and a second end opposite to the first end of the resilient member abuts the case; the controlling circuit is configured for detecting the position of the actuating piece of the movable member and controlling the bi-directional pump to propel the liquid in the first direction or in the second direction according to the position of the actuating piece.