Marine water inlet device

Claim 2

A marine water inlet device in combination with a marine vessel and providing the function of cleaning the water inlet of an engine having water flowing therethrough comprising, in combination, a marine vessel with a strainer located on an exterior surface of the hull of said marine vessel, said strainer including a chamber defined by an upper surface, depending sidewalls, and a lower surface, said upper surface being located adjacent the exterior surface of the hull of said marine vessel, inlet means for introducing water in said strainer chamber including perforate openings located in said chamber lower surface, outlet means located on said upper surface of said chamber including an enclosure adapter for passing said water from said chamber through said hull of said marine vessel and in fluid communication with said engine, said adapter enclosure having a housing with sidewalls and an open top and an open bottom, said open bottom being sealingly connected to an inlet end of a conduit with the opposite end of said conduit being connected to the liquid cooling system of said engine, a fluid conduit with an end connected to a source of liquid under pressure separate from the engine cooling system pressure means to maintain said liquid under pressure, said fluid conduit passing through the sidewall of said housing of said enclosure adapter and extending downwardly within said adapter enclosure into said strainer chamber for backwash of said perforate openings in said chamber.

Claim 3

A Marine water inlet device in combination with a marine vessel and providing the function of cleaning the water inlet of an engine having water flowing therethrough comprising, in combination, a marine vessel with a strainer located on an exterior surface of the hull of said marine vessel, said strainer including a chamber defined by an upper surface, depending sidewalls, and a lower surface, said upper surface being located adjacent the exterior surface of the hull of said marine vessel, inlet means for introducing water in said strainer chamber including perforate openings located in said chamber lower surface, outlet means located on said upper surface of said chamber including an enclosure adapter for passing said water from said chamber through said hull of said marine vessel and in fluid communication with said engine, said adapter enclosure having a housing with sidewalls and an open top and an open bottom, said open bottom being sealingly connected to an inlet end of a conduit with the opposite end of said conduit being connected to the liquid cooling system of said engine, a fluid conduit with an end connected to a source of liquid under pressure separate from the engine cooling system, pressure means to maintain said liquid under pressure, said fluid conduit passing through the sidewall of said housing of said enclosure adapter and extending downwardly within said adapter enclosure into said strainer chamber for backwash of said perforate openings in said chamber, emergency inlet opening means located in said chamber lower surface with closure means therefore consisting of a pressure operated by-pass valve.

Claim 4

A Marine water inlet device in combination with a marine vessel and providing the function of cleaning the water inlet of an engine having water flowing therethrough comprising, in combination, a marine vessel with a strainer located on an exterior surface of the hull of said marine vessel, said strainer including a chamber defined by an upper surface, depending sidewalls, and a lower surface, said upper surface being located adjacent the exterior surface of the hull of said marine vessel, inlet means for introducing water in said strainer chamber including perforate openings located in said chamber lower surface, outlet means located on said upper surface of said chamber including an enclosure adapter for passing said water from said chamber through said hull of said marine vessel and in fluid communication with said engine, said adapter enclosure having a housing with sidewalls and an open top and an open bottom, said open bottom being sealingly connected to an inlet end of a conduit with the opposite end of said conduit being connected to the liquid cooling system of said engine, a fluid conduit with an end connected to a source of liquid under pressure separate from the engine cooling system, pressure means to maintain said liquid under pressure, said fluid conduit passing through the sidewall of said housing of said enclosure adapter and extending downwardly within said adapter enclosure into said strainer chamber for backwash of said perforate openings in said chamber, emergency inlet opening means located in said chamber lower surface with closure means therefore consisting of a pressure operated by-pass valve.

Claim 5

Apparatus as in claim 2 wherein said by-pass valve has mechanical linkage means connected to said pressure operated by pass-valve whereby said valve may be operated to open said emergency inlet when clogging of the perforate openings into the strainer chamber occurs.

Claim 6

Apparatus as in claim 2 wherein said fluid conduit is connected to a source of pressure passing through the sidewall of said housing of said enclosure adapter enclosure into said strainer for backpressurizing of said perforate openings in said chamber, said pressure being of other than liquid form.