Fluid handling – With leakage or drip collecting
Patent
1996-01-06
1999-01-12
Walton, George L.
Fluid handling
With leakage or drip collecting
122504, 1225042, 122507, 126344, 126388, 137392, 137558, 200 6104, 200 6405, 307118, 340605, 340620, 361178, F16K 3102, F16K 5100, H01H 3518
Patent
active
058574824
ABSTRACT:
An overflow control system includes a vessel having a liquid input and output, the vessel having a top and bottom defined by the gravity vector. The system further includes a housing peripherally surrounding the vessel about all surfaces, other than the bottom, to provide a fluid and thermal insulation region between the vessel and the housing. The system also includes a liquid collection chamber formed integrally beneath the vessel and housing, and in fluid communication with the insulation region. A leak or fracture of the vessel will result in an accumulation of liquid in the collection chamber. The system further includes a normally open electrically actuatable solenoid disposed within the liquid input. Within the liquid output of the vessel is provided a check valve for closing the output responsive to any gradient of fluid pressure in the direction of the vessel in excess of a reference level. The system, in addition, includes a liquid detector, disposed within the liquid collection chamber, the detector including an element within an electrical circuit having electrical communication between the solenoid in the input and the liquid detector, and extending along the length of the housing within the insulating region, in which the liquid detector will close a circuit responsive to a reference level of liquid within the liquid collection chamber, this permitting current flow to the solenoid to actuate it, this blocking further input of liquid to the vessel. The system also includes an element for disabling an energy input to the vessel responsive to actuation of the liquid detector. Also, a momentary switch may be included in electrical communication with the liquid level sensor to provide for self-testing of all system circuitry and normally open mechanical elements.
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patent: 3063432 (1962-11-01), Bond et al.
patent: 3069671 (1962-12-01), Taylor
patent: 3473553 (1969-10-01), Collins
patent: 3770002 (1973-11-01), Brown
patent: 3920031 (1975-11-01), Maxfield
patent: 4805662 (1989-02-01), Moody
patent: 4944253 (1990-07-01), Bellofatto
patent: 5029605 (1991-07-01), Dowling et al.
patent: 5188143 (1993-02-01), Krebs
Silverman M. K.
Walton George L.
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