Liquid purification or separation – Flow – fluid pressure or material level – responsive – Float
Patent
1995-02-15
1997-04-08
Drodge, Joseph W.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Float
15353, 137398, 137429, 433 92, B01D 2124, A47L 538
Patent
active
056184107
ABSTRACT:
An automatically draining vacuum apparatus for collecting a fluid to be vacuumed. The vacuum apparatus includes a vacuum generating source which generates a suction force and a tank for holding the fluid to be vacuumed. The tank includes a vacuum port, an inlet and a drainage opening for emptying fluid held within the tank. The suction force at the vacuum port draws the fluid to be vacuumed into the tank through the inlet and prevents the fluid within the tank from passing from the tank through the drainage opening. A float is located in the tank for closing off the vacuum port to prevent the fluid within the tank from passing through the vacuum port. The float has a positive buoyancy with respect to the fluid and is positioned within the tank such that when the fluid within the tank is above a predetermined level, the suction force at the vacuum port and the float buoyancy maintain the float in a blocking position to at least partially block the vacuum port, creating a second suction force. The second suction force, which is less than the first suction force in the tank, allows the fluid within the tank to drain to a level below the predetermined level to cause the float to move from the blocking position and restore the first suction force in the tank.
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Snyder Terence L.
Wallace George M.
Den-Tal-Ez, Inc.
Drodge Joseph W.
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