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US 3,937,168 AGranted
Bilge pump
OwnerLyle E. Doakinventor
Life of this patent
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OwnerLyle E. Doakinventor
Estimating the term…
A wave-actuated bilge pump for pumping foul bilge gases from a boat. The pump includes a generally inverted U-shaped section of hollow tubing with generally downwardly directed legs having open ends. One of the ends is positioned to receive bilge gases from within the boat, and the other end is immersed below the surface of the water outside the boat. A freely-opening check valve permits bilge gases to flow within the tubing only away from the fume-receiving end. A gas-escape port opened to the atmosphere is provided in the tubing above the lower, open tubing end immersed in the water, and a second, freely-opening check valve is provided to permit flow of bilge fumes through the port only outwardly of the tubing of the atmosphere. Wave-action causes the level of water in the exterior leg of the tubing to rise and to fall such that bilge gases are drawn into the tubing as the water level falls, and the gases are exhausted from the tubing as the water level rises.
A bilge pump for pumping bilge gases from a boat and comprising a generally inverted U-shaped length of tubing providing a first leg having an open end for receiving bilge gases from a boat and a second leg having a lower, open end immersable in the water outside the boat, the tubing including an exhaust port spaced above the immersed tubing end, and freely-opening check valve means permitting the flow of bilge gases in the first leg only away from the gas-receiving end when water is receding from the second leg and also permitting the flow of bilge gases through the exhaust port outwardly of the tubing to the atmosphere when water is entering the second leg.
The bilge pump of cllaim 1 in which the pump is configured for rigid mounting to a boat with the first leg interior of the boat and in communication with bilge gases and with the second leg exterior of the boat, and with a section of connector tubing joining the first and second legs.
A bilge pump for pumping bilge gases from a boat and comprising a first generally upright length of tubing having an open lower end to receive bilge gases within the boat, a second substantially upright length of tubing positioned exteriorly of the boat and having a lower open end positioned beneath the surface of water outside the boat, at least the lower portion of the last-mentioned tubing having a cross-sectional area at least two times that of the first length of tubing, a length of connector tubing joining the upper ends of the first and second lengths of tubing, the second length of tubing having adjacent its upper end an exhaust port, an exhaust duct connected to the exhaust port and leading to the atmosphere, and a pair of check valves positioned respectively in the exhaust duct and the length of connector tubing with the last-mentioned tubing and duct forming valve housings for the valves, each valve comprising a disc having a diameter slightly smaller than that of its housing and having a pivot pin pivotally mounting the disc slightly above its center of gravity to opposed housing walls so that the valve will open upon application of a minute pressure differential thereacross, the valve including a split annular valve seat carried by the inner walls of the housing and arranged to engage the periphery of the disc as the latter assumes a position perpendicular to the flow direction of bilge gases through the housing,
Dependencies are inferred from the claim text.