US3727671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern assembly for a foundry core unit for casting a cylinder block of a multi-cylinder internal combustion engine
Assignee: Toyota Industries Corp
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Filing: 1971-09-07
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Granted: 1973-04-17
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Expires: 1991-09-07
Abstract
Abstract The core-making pattern assembly is comprised of two side pattern members having a plurality of recesses corresponding to the number of cylinders in a V-type internal combustion engine. A movable member is mounted in each recess and carries a core section for shaping an engine cylinder bore.
Inventors
- 👤 K Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:47
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/10; B22C9/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A core-making pattern assembly comprising a plurality of opposingly movable pattern members including side pattern members adapted for preparing a composite core for casting a V-arranged multi-cylinder type internal combustion engine, said assembly being characterized in that each of said side pattern members detachably carries a separate piece positioned in a positioning recess formed in each of said pattern members, said separate piece carrying in turn a core section adapted for shaping an engine cylinder bore.
Claim 2
Dependent Claim
76 words
A core-making pattern assembly comprising a plurality of opposingly movable pattern members including side pattern members adapted for preparing a composite core for casting a V-arranged multi-cylinder type internal combustion engine, said assembly being characterized in that each of said side pattern members detachably carries a separate piece positioned in a positioning recess formed in each of said pattern members, said separate piece carrying in turn a core section adapted for shaping an engine cylinder bore.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |