# US 10,766,591 B2 · Cooling water drain system for a marine engine

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- Number: US 10,766,591 B2
- Document ID: US10766591B2
- Status: Granted
- Kind: B2
- Application number: 16/333,045
- Filed: 2016-09-23
- Published: 2019-07-04
- Granted: 2020-09-08
- Earliest claimed: 2016-09-23
- Assignees: AB Volvo Penta
- Applicants: AB Volvo Penta
- Inventors: Emil Hasl; William M. Cahoon; Justin Frohock
- Web page: https://patentgrep.com/patent/US10766591B2

## CPC

- B63H 20/30: {Cooling-water intakes} for flushing {(circuits for flushing outboard marine engines F01P3/205)}
- B63H 20/28: {Arrangements, apparatus and methods for handling cooling-water in outboard drives, e.g.} cooling-water intakes {(cooling circuits for outboard marine engines F01P3/202)}
- B63H 21/383: {for handling cooling-water (in outboard drives B63H20/28; in machines or engines in general F01P3/00)}
- F01P 3/205: {Flushing}
- F01P 11/0276: {Draining or purging}
- F01P 11/20: concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
- F01P 2050/06: using liquid-to-liquid heat exchangers
- B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00)
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)

## Abstract

A drain system for a marine engine cooling system, includes an engine having one of a closed coolant circuit or an open cooling circuit, a raw water passageway having a raw water intake for drawing raw water into the raw water passageway, including a hose arranged to have a vertically high point and a vertically low point, a drain valve connected to the raw water passageway at the in hose vertically low point, a vent line connected to the raw water passageway at the hose vertically high point and a control handle located remote from the hose vertically high point and the hose vertically low point, the control handle having a vent valve connected to the vent line, the control handle being connected to the drain valve by a cable, wherein movement of the control handle selectively simultaneously opens and closes the drain valve and the vent valve.

## Claims

### Claim 1

A marine engine cooling system, comprising:
a raw water passageway having a raw water intake for drawing raw water into the raw water passageway, and including a conduit arranged to have an upper point and a lower point;
a drain valve connected to the raw water passageway at the conduit lower point;
a vent line connected to the raw water passageway at the conduit higher point; and,
a control handle located remote from the conduit higher point and the conduit lower point, the control handle being operatively connected to a vent valve connected to the vent line, wherein actuating movement of the control handle selectively opens and closes the vent valve.

### Claim 2 (depends on 1)

The marine engine cooling system of claim 1, wherein the control handle is connected to the drain valve by a cable, wherein said actuating movement of the control handle selectively opens and closes the drain valve.

### Claim 3 (depends on 2)

The marine engine cooling system of claim 2, wherein said movement is along an axial direction of the handle.

### Claim 4 (depends on 2)

The marine engine cooling system of claim 2, wherein the drain valve comprises a hollow, cylindrical body having a drain inlet and a drain outlet, and comprising a spool disposed in the hollow, cylindrical body and connected to the cable, the spool having a first position preventing flow between the drain inlet and the drain outlet and a second position connecting the drain inlet and the drain outlet.

### Claim 5 (depends on 1)

The marine engine cooling system of claim 1, wherein the control handle comprises a tubular body having a vent port to which the vent line is connected and having an air relief opening, and comprising a valve member movably disposed in the tubular body having a closed position blocking flow between the vent port and the air relief opening and having an open position allowing flow between the vent port and the air relief opening.

### Claim 6 (depends on 1)

The marine engine cooling system of claim 1, wherein the control handle is connected to the vent valve by a cable.