US3835822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled fuel pump for internal combustion engines
Assignee: Brunswick Corp
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Filing: 1972-08-16
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Granted: 1974-09-17
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Expires: 1992-08-16
Abstract
Abstract A fuel pump for water-cooled marine engines includes a cast aluminum housing. A water cooling tube is embedded in the housing connected directly to the inlet of the main cooling system for the engine such that upon initial starting of the engine, cooling water is immediately supplied to the fuel pump to reduce its temperature, and thereby eliminate vapor lock conditions. The tube may be formed of suitable material to minimize electrolytic conditions with respect to the cast housing and prevent possible leakage of water into the fuel system.
Inventors
- 👤 J Mickle
- 👤 N Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
In combination, an internal combustion engine having an engine block and an engine cooling passageway means and a cooling pump means having an outlet means connected to supply a cooling liquid through the passageway means, a fuel pump having an outer housing defining an internal pUmping chamber with a confining wall portion, a fuel pump cooling passageway in said wall portion having an impervious confining wall surface and including an inlet means and an outlet means, said outlet means being connected to said engine cooling passageway means, and means connecting the inlet means of said pump cooling passageway to the outlet of the cooling pump means and producing a continuous flow of cold cooling liquid through said passageway to reduce the temperature of the fuel.
Claim 2
Dependent Claim
125 words
In combination, an internal combustion engine having an engine block and an engine cooling passageway means and a cooling pump means having an outlet means connected to supply a cooling liquid through the passageway means, a fuel pump having an outer housing defining an internal pUmping chamber with a confining wall portion, a fuel pump cooling passageway in said wall portion having an impervious confining wall surface and including an inlet means and an outlet means, said outlet means being connected to said engine cooling passageway means, and means connecting the inlet means of said pump cooling passageway to the outlet of the cooling pump means and producing a continuous flow of cold cooling liquid through said passageway to reduce the temperature of the fuel.
Claim 3
Dependent Claim
54 words
The fuel pump of claim 1 wherein said fuel pump includes a cast metal body, said fuel pump cooling passageway including a tubular member cast within said cast metal body and formed of a material non-electrolytic with respect to the cast metal body and thereby preventing electrolytic action and perforation of the tubular member.
Claim 4
Dependent Claim
31 words
The engine of claim 1 wherein said fuel pump includes a cast aluminum body, said fuel pump cooling passageway including a brass tubular member integrally cast within said cast aluminum body.
Claim 5
Dependent Claim
76 words
The engine of claim 3 wherein said fuel pump includes a pump body with a main pumping chamber defined by a generally oval recess and a secondary pumping chamber located to one side and immediately adjacent to said main pumping chamber, said fuel pump passageway being formed as a generally U-shaped member extending about the main pumping chamber and with the portion of the passageway located in the wall portion adjacent to the secondary pumping chamber.
Claim 6
Dependent Claim
77 words
The fuel pump of claim 1 wherein said fuel pump includes a pump body with a main pumping chamber defined by a generally oval recess and a secondary pumping chamber located to one side and immediately adjacent to said main pumping chamber, said fuel pump passageway being formed as a generally U-shaped member extending about the main pumping chamber and with the portion of the passageway located in the wall portion adjacent to the secondary pumping chamber.
Claim 7
Dependent Claim
41 words
The fuel pump of claim 5 wherein said fuel pump passageway is lined with a preformed tubular member formed of a metal which is impervious to water and which minimizes electrolytic action with respect to the body of the fuel pump.
Claim 8
Dependent Claim
169 words
An internal combustion engine forming a part of a marine propulsion unit and having an engine block and a water cooling system means to continuously supply water from the body of water in which the engine is operating to an engine cooling passageway means in the engine block for cooling and including a fuel pump, said fuel pump comprising means for mounting the fuel pump to the engine block and including pressure activating opening means coupled to at least one crankcase unit of the internal combustion engine, a water passageway means in said fuel pump located in efficient heat exchange relationship to said fuel passageways, and means connecting said water passageway means with the inlet side of the cooling passageway means for supplying cooling water to flow through said fuel pump and in series with said cooling passageway means and to thereby create a series flow of cooling liquid through the fuel pump and then the engine cooling passageway means to provide synchronism with the cooling of the engine.
Claim 9
Dependent Claim
169 words
An internal combustion engine forming a part of a marine propulsion unit and having an engine block and a water cooling system means to continuously supply water from the body of water in which the engine is operating to an engine cooling passageway means in the engine block for cooling and including a fuel pump, said fuel pump comprising means for mounting the fuel pump to the engine block and including pressure activating opening means coupled to at least one crankcase unit of the internal combustion engine, a water passageway means in said fuel pump located in efficient heat exchange relationship to said fuel passageways, and means connecting said water passageway means with the inlet side of the cooling passageway means for supplying cooling water to flow through said fuel pump and in series with said cooling passageway means and to thereby create a series flow of cooling liquid through the fuel pump and then the engine cooling passageway means to provide synchronism with the cooling of the engine.
Claim 10
Dependent Claim
32 words
The engine of claim 7 wherein said engine cooling passageway means and said water passageway means are constructed to automatically drain the water therein upon termination of the operation of the engine.
Claim 11
Independent Claim
121 words
The method of providing fuel to a fuel pump an internal combustion engine forming a part of a marine propulsion device wherein water cooling is provided to the internal combustion engine by drawing water upwardly from the supporting body of water and passing it through the engine and discharging it therefrom, said water cooling passageway means being constructed to provide for automatic draining of the water from the engine upon turnoff upon stopping of the engine, comprising the steps of providing water cooling to said fuel pump in synchronism with the provision of cooling water to said engine, and correspondinGly draining of the cooling water from the engine and from said fuel pump upon termination of the operation of the engine.
Claim 12
Independent Claim
121 words
The method of providing fuel to a fuel pump an internal combustion engine forming a part of a marine propulsion device wherein water cooling is provided to the internal combustion engine by drawing water upwardly from the supporting body of water and passing it through the engine and discharging it therefrom, said water cooling passageway means being constructed to provide for automatic draining of the water from the engine upon turnoff upon stopping of the engine, comprising the steps of providing water cooling to said fuel pump in synchronism with the provision of cooling water to said engine, and correspondinGly draining of the cooling water from the engine and from said fuel pump upon termination of the operation of the engine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |