Patent US3074389A successfully refreshed from Google Patents.
US3074389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-cooled cylinder heads for internal combustion engines
Assignee: Ricardo PLC
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Filing: 1962-05-11
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Granted: 1963-01-22
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Leslie R C Lilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:03
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/40; F02F1/42; F02F1/4214; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/027; F02B2275/00; F02B2275/14; F02B2275/16; F02B3/00; F02B3/06; F02F2001/244; F02F2001/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A LIQUID-COOLED CYLINDER HEAD STRUCTURE COMPRISING SPACED UPPER AND LOWER WALLS AND A SURROUNDING SIDE WALL DEFINING THEREBETWEEN A COOLING LIQUID SPACE, AT LEAST THREE CAST-IN SPACED HOLLOW BODIES POSITIONED WITHIN SAID COOLING LIQUID SPACE, SAID LOWER WALL BEING FORMED WITH A THICKENED PART CONSTITUTING AN UPWARD PROJECTION BETWEEN SAID HOLLOW BODIES, SAID PROJECTION HAVING FORMED THEREIN HORIZONTAL COOLANT PASSAGES EXTENDING BETWEEN SAID HOLLOW BODIES, AND A DOWNWARDLY EXTENDING COOLANT PASSAGE EXTENDING THROUGH THE UPPER FACE OF SAID PROJECTION AND COMMUNICATING WITH THE INNER END OF EACH OF SAID HORIZONTAL COOLANT PASSAGES, AND MEANS ARRANGED TO CAUSE COOLING LIQUID TO FLOW THROUGH THE SAID COOLANT PASSAGES IN THE SAID PROJECTION.
Claim 2
Dependent Claim
110 words
A LIQUID-COOLED CYLINDER HEAD STRUCTURE COMPRISING SPACED UPPER AND LOWER WALLS AND A SURROUNDING SIDE WALL DEFINING THEREBETWEEN A COOLING LIQUID SPACE, AT LEAST THREE CAST-IN SPACED HOLLOW BODIES POSITIONED WITHIN SAID COOLING LIQUID SPACE, SAID LOWER WALL BEING FORMED WITH A THICKENED PART CONSTITUTING AN UPWARD PROJECTION BETWEEN SAID HOLLOW BODIES, SAID PROJECTION HAVING FORMED THEREIN HORIZONTAL COOLANT PASSAGES EXTENDING BETWEEN SAID HOLLOW BODIES, AND A DOWNWARDLY EXTENDING COOLANT PASSAGE EXTENDING THROUGH THE UPPER FACE OF SAID PROJECTION AND COMMUNICATING WITH THE INNER END OF EACH OF SAID HORIZONTAL COOLANT PASSAGES, AND MEANS ARRANGED TO CAUSE COOLING LIQUID TO FLOW THROUGH THE SAID COOLANT PASSAGES IN THE SAID PROJECTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |