US3892209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-cooled reciprocating engines, more particularly marine engines
Assignee: Individual
•
Filing: 1974-03-11
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Granted: 1975-07-01
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Expires: 1994-03-11
Abstract
Abstract A liquid cooled reciprocating engine, particularly of the high power diesel marine type. The engine head and the engine body are formed of differing materials, and the head material is less prone to corrosion than the body. The cooling system comprises a first closed circuit with heat exchanger for cooling the body and a second open circuit for cooling the head thereof thereby permitting the use of a more corrosive coolant for the head than for the body.
Inventors
- 👤 Felix Amiot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:56
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/02; F01P2003/021; F01P2003/024; F01P2050/00; F01P2050/02; F01P2050/04; F01P2050/06; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
A liquid-cooled reciprocating engine having a head; and a body connected to the head; the head and the body respectively being formed of differing metals; cooling chambers being provided in said head and body; the body being formed of metal more prone to corrosion than the metal forming the head; and wherein a liquid cooling system is provided for the engine and said system comprises; at least a first circuit and a second circuit with means for receiving, respectively, a first coolant in said first circuit and a second coolant, different from said first coolant, in said second circuit, the first circuit being closed and connected in fluid communication with the cooling chamBer of said body of the engine, said first circuit including a heat exchanger, and the second circuit being open and connected in fluid communication with the cooling chamber of the said head of the engine; the arrangement being such that the second coolant for said second open circuit is more corrosive than the first coolant for said first closed circuit; said heat exchanger being provided to permit cooling of the coolant of the first closed circuit.
Claim 2
Dependent Claim
189 words
A liquid-cooled reciprocating engine having a head; and a body connected to the head; the head and the body respectively being formed of differing metals; cooling chambers being provided in said head and body; the body being formed of metal more prone to corrosion than the metal forming the head; and wherein a liquid cooling system is provided for the engine and said system comprises; at least a first circuit and a second circuit with means for receiving, respectively, a first coolant in said first circuit and a second coolant, different from said first coolant, in said second circuit, the first circuit being closed and connected in fluid communication with the cooling chamBer of said body of the engine, said first circuit including a heat exchanger, and the second circuit being open and connected in fluid communication with the cooling chamber of the said head of the engine; the arrangement being such that the second coolant for said second open circuit is more corrosive than the first coolant for said first closed circuit; said heat exchanger being provided to permit cooling of the coolant of the first closed circuit.
Claim 3
Dependent Claim
14 words
A liquid-cooled reciprocating engine according to claim 1, of the diesel and marine type.
Claim 4
Dependent Claim
28 words
An engine according to claim 1, wherein the closed circuit is provided to contain fresh water and the second open cooling circuit is provided to receive sea water.
Claim 5
Dependent Claim
21 words
An engine according to claim 1, wherein the open circuit is completely independent of the closed circuit and its heat exchanger.
Claim 6
Dependent Claim
43 words
An engine according to claim 1, wherein the open circuit is so constructed that at least some of the coolant entering such open circuit passes through the heat exchanger of the closed circuit thereby to cool the coolant circulating in such closed circuit.
Claim 7
Dependent Claim
33 words
An engine according to claim 5, wherein the open circuit is so constructed that only some of the coolant for such circuit may flow through the heat exchanger incorporated in the closed circuit.
Claim 8
Dependent Claim
17 words
An engine according to claim 1 wherein a flow control valve is incorporated in the open circuit.
Claim 9
Dependent Claim
18 words
An engine according to claim 1, wherein a filter is provided at an inlet of the open circuit.
Claim 10
Dependent Claim
49 words
An engine according to claim 1, including ancillary apparatus to be heated or cooled and wherein provision is made whereby at least some of any coolant which has passed through the open cooling circuit is routed, after leaving the cooling chambers of the engine head, to said ancillary apparatus.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |