US4220121A — Heat exchanger for marine propulsion engines

Claim 1

Independent Claim 112 words

A cooling system for an internal combustion engine in which a liquid coolant is circulated through the engine, said coolant having entrained gases, comprising a housing means having a spiral flow directing means directing the coolant to flow in a spiral passageway and developing centrifugal forces causing the liquid coolant to move outwardly within said passageway, a gas collection means located generally centrally of the spiral flow directing means for withdrawing said entrained gases from said liquid coolant, and a means located within the radial outer portion of the spiral passageway in radially spaced relation to said gas collection means for cooling the coolant passing through spiral passageway in the housing means.

Claim 2

Dependent Claim 112 words

A cooling system for an internal combustion engine in which a liquid coolant is circulated through the engine, said coolant having entrained gases, comprising a housing means having a spiral flow directing means directing the coolant to flow in a spiral passageway and developing centrifugal forces causing the liquid coolant to move outwardly within said passageway, a gas collection means located generally centrally of the spiral flow directing means for withdrawing said entrained gases from said liquid coolant, and a means located within the radial outer portion of the spiral passageway in radially spaced relation to said gas collection means for cooling the coolant passing through spiral passageway in the housing means.

Claim 3

Dependent Claim 31 words

The cooling system of claim 1 including a heat exchange spiral coil located in meshing relationship with said spiral flow directing means for removing of thermal energy from said liquid coolant.

Claim 4

Dependent Claim 48 words

The cooling system of claim 1 wherein said flow directing member is a spiral baffle having a central tubular core defining said gas collection conduit means, and having a heat exchange spiral coil meshing with the spiral baffle and located in outwardly spaced relation to the tubular core.

Claim 5

Dependent Claim 31 words

The cooling system of claim 3 wherein said housing means is a tubular member, said spiral baffle having an outside periphery essentially corresponding to the inside periphery of the housing means.

Claim 6

Dependent Claim 26 words

The cooling system of claim 4 wherein said spiral coil has an outer peripheral dimension slightly less than the outer peripheral dimension of the tubular member.

Claim 7

Dependent Claim 149 words

A heat exchanger apparatus for the cooling system of an internal combustion engine in which a liquid coolant including dissolved gases is circulated through the engine, comprising a housing means having a spiral flow directing member for directing the coolant to flow in a spiral passageway, a gas collection conduit means located centrally of said spiral flow directing means, a heat exchange spiral tube means located in meshing relationship within the radially outer portion of said spiral flow passageway in substantial spaced relation to said conduit means and adapted to carrying a cooling liquid for removing of thermal energy from said liquid coolant, whereby said coolant flows through said spiral passageway with the coolant in the outer portion of the spiral passageway in heat exchange relationship to the tube means and with the dissolved gas moving inwardly of the spiral tube means and into the gas collection conduit means.

Claim 8

Dependent Claim 149 words

A heat exchanger apparatus for the cooling system of an internal combustion engine in which a liquid coolant including dissolved gases is circulated through the engine, comprising a housing means having a spiral flow directing member for directing the coolant to flow in a spiral passageway, a gas collection conduit means located centrally of said spiral flow directing means, a heat exchange spiral tube means located in meshing relationship within the radially outer portion of said spiral flow passageway in substantial spaced relation to said conduit means and adapted to carrying a cooling liquid for removing of thermal energy from said liquid coolant, whereby said coolant flows through said spiral passageway with the coolant in the outer portion of the spiral passageway in heat exchange relationship to the tube means and with the dissolved gas moving inwardly of the spiral tube means and into the gas collection conduit means.

Claim 9

Dependent Claim 27 words

The apparatus of claim 6 including gas collection means located generally centrally of the spiral flow passageway means for withdrawing of gases released from said liquid coolant.

Claim 10

Dependent Claim 16 words

The heat exchanger apparatus of claim 6 wherein said flow directing member is a spiral baffle.

Claim 11

Dependent Claim 21 words

The apparatus of claim 8 wherein said heat exchange spiral tube means is a closed coil meshing with said spiral baffle.

Claim 12

Dependent Claim 20 words

The apparatus of claim 9 wherein said spiral coil includes a plurality of individual adjacent tubes defining parallel flow paths.

Claim 13

Dependent Claim 12 words

The apparatus of claim 9 wherein said coil includes heat exchange fins.

Claim 14

Dependent Claim 156 words

A water cooling system for an internal combustion engine, a cylindrical housing open at the opposite ends, a spiral flow baffle located in said housing and directing flow in a spiral path and developing centrifugal forces on the liquid causing the liquid to move outwardly, a gas conduit means located generally centrally of the spiral flow directing member for withdrawing of gases released from said flowing liquid, a spiral coil meshing with said baffle and located within the outer peripheral portion of the baffle in radially spaced relation to gas conduit means, an inlet head secured to one end of the housing and having an inlet chamber, a thermostatic valve having a peripheral planar mounting member, a pair of mounting plates adapted to clamp the mounting member therebetween, and attachment means for securing said plates to said head within said inlet chamber to form an end closure wall to the housing with a thermostatically controlled opening.

Claim 15

Dependent Claim 156 words

A water cooling system for an internal combustion engine, a cylindrical housing open at the opposite ends, a spiral flow baffle located in said housing and directing flow in a spiral path and developing centrifugal forces on the liquid causing the liquid to move outwardly, a gas conduit means located generally centrally of the spiral flow directing member for withdrawing of gases released from said flowing liquid, a spiral coil meshing with said baffle and located within the outer peripheral portion of the baffle in radially spaced relation to gas conduit means, an inlet head secured to one end of the housing and having an inlet chamber, a thermostatic valve having a peripheral planar mounting member, a pair of mounting plates adapted to clamp the mounting member therebetween, and attachment means for securing said plates to said head within said inlet chamber to form an end closure wall to the housing with a thermostatically controlled opening.

Claim 16

Dependent Claim 29 words

The water cooling system of claim 12, wherein a reservoir is integral with the housing, said gas conduit means terminates within the reservoir for discharging of entrained gases therein.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-09-02	1984-03-03	1984-09-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-09-02	1988-03-03	1988-09-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-09-02	1992-03-03	1992-09-02	$7700.00	Window Closed / Lapsed

Heat exchanger for marine propulsion engines

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