Ships – Valves – Sea cocks
Patent
1998-07-29
1999-09-07
Avila, Stephen
Ships
Valves
Sea cocks
4431, B63B 1300
Patent
active
059470470
ABSTRACT:
A boat has a seacock operatively attached to the hull and movable between open and closed positions. The seacock is operatively connected to a discharge pump, which in turn is connected to a sewage holding tank. An electrical switch is actuated in response to the position of the seacock, and control circuitry is connected to the seacock electrical switch and the discharge pump to prevent operation of the pump if the seacock is closed (or in any position aside from fully open). An indicator, such as one or more light emitting diodes, is also actuated in response to the seacock electrical switch position, and another indicator, such as one or more light emitting diodes, is connected to the discharge pump and indicates when that pump is operating. The electrical switch is waterproof and meets marine vessel ignition prevention and electromagnetic compatibility requirements, and typically is actuated in response to the position of a manually actuable (e.g. rotatable) handle of the seacock.
REFERENCES:
patent: 2158938 (1939-05-01), Hoerichs
patent: 4177971 (1979-12-01), Landamore
patent: 4697535 (1987-10-01), Wileman, III
patent: 5404048 (1995-04-01), Panner
patent: 5621924 (1997-04-01), Friedman et al.
patent: 5681148 (1997-10-01), Friedman et al.
patent: 5724908 (1998-03-01), Murray
Avila Stephen
Sealand Technology, Inc.
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