Patent US3889644A successfully refreshed from Google Patents.
US3889644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cooling system
Assignee: Perkins Ltd
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Filing: 1974-04-10
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Granted: 1975-06-17
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Expires: 1994-04-10
Abstract
Abstract A liquid cooled engine has a cylinder head having two coolant chambers, one in the form of a gallery, and at least one air and one exhaust passage cast therein, wherein a coolant passage from the gallery to the other chamber passes between the air and exhaust passage and the flow of coolant therein acts to cool the metal of the cylinder head located between the inlet and exhaust valve seats. Also in the case of an engine having a combustion chamber in the head the passage is so aligned as to direct a stream of coolant at the outer surface of the combustion chamber. Alternatively, if the engine is a fuel injection engine and does not have a combustion chamber in the head, the passage may be aligned so as to direct the coolant stream in the direction of the injectors.
Inventors
- 👤 Trevor J Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:12
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/38; F01; F01P; F01P3/00; F01P3/02; F01P11/00; F01P11/04; F01P2003/028; F02B; F02B75/00; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1824; F02B2275/00; F02B2275/16; F02B2275/34; F02B3/00; F02B3/06; F02F2001/244; F02F2001/247; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A liquid cooled internal combustion engine incorporating a cylinder head and block, at least one air passAge terminating at an inlet valve seat, at least one exhaust gas passage terminating at an exhaust valve seat, first and second coolant chambers cast in the head, the first of the chambers being in the form of a gallery extending over the length of the cylinder head, said two chambers having a coolant passage joining them arranged to pass between at least a part of each of the air and the exhaust gas passages, the arrangement being that flow of coolant in the passage acts to cool the metal of the cylinder head between the inlet and exhaust valve, third and fourth coolant chambers cast in the block, said third chamber being positioned beneath said gallery, and a plurality of paired gallery feed ports in the head and block respectively in register with each other to permit coolant to pass from the third chamber to the gallery.
Claim 2
Dependent Claim
164 words
A liquid cooled internal combustion engine incorporating a cylinder head and block, at least one air passAge terminating at an inlet valve seat, at least one exhaust gas passage terminating at an exhaust valve seat, first and second coolant chambers cast in the head, the first of the chambers being in the form of a gallery extending over the length of the cylinder head, said two chambers having a coolant passage joining them arranged to pass between at least a part of each of the air and the exhaust gas passages, the arrangement being that flow of coolant in the passage acts to cool the metal of the cylinder head between the inlet and exhaust valve, third and fourth coolant chambers cast in the block, said third chamber being positioned beneath said gallery, and a plurality of paired gallery feed ports in the head and block respectively in register with each other to permit coolant to pass from the third chamber to the gallery.
Claim 3
Dependent Claim
22 words
An engine as defined in claim 1 wherein the gallery feed ports constitute the only exit for coolant in the third chamber.
Claim 4
Dependent Claim
67 words
An engine as defined in claim 1 wherein said fourth chamber is arranged as a longitudinally extending duct on the side of the engine oppoosite to the gallery and a plurality of paired duct outlet ports in the head and duct respectively which are in register with each other and permit coolant to pass from the duct to the second chamber throughout the length of the latter.
Claim 5
Dependent Claim
29 words
An engine as claimed in claim 3 including driven coolant circulating means so connected to said duct and said third chamber as to provide separate flow of coolant thereto.
Claim 6
Dependent Claim
19 words
An engine as claimed in claim 4 wherein said duct tapers inwardly along its length from coolant entry end.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |