Invalidity dossier
US 5465778
Method of casting one piece cylinder liner incorporating a draftless water jacket
Current assignee: General Electric Co
Added 9/23/2026, 5:23:31 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
US5465778A — Method of Casting One Piece Cylinder Liner Incorporating a Draftless Water Jacket
- Patent number: US5465778A
- Application: US08/275,507; filed 1994-07-15
- Priority date: 1993-03-11; granted/published: 1995-11-14
- Inventors: Richard J. Clark, Richard K. Clark, Dennis E. Clark
- Original assignee: Clark Industries Inc; current assignee (as listed): General Electric Co
- Legal status (as listed): Expired – Lifetime; anticipated expiration 2012-11-14
- Classifications (selected): B22C9/10, B22C9/103; F02F1/00, F02F1/18, F02F1/22; F02F2200/06
Purpose. The disclosure concerns a cylinder liner for an engine that includes a water jacket and is of unitary (one-piece) cast construction, including a "draftless" water jacket. Per the supplied text, the liner is created using a two-piece core that allows the liner to be cast vertically, as one piece, without drafts. The stated benefits are improved concentricity, larger air ports, and straight water paths causing less water swirl and better cooling.
Plain-language scope. Rather than horizontally casting a liner from a many-piece core and then welding steel bands over stepped upper and lower openings, the disclosure provides a simple two-piece core (FIGS. 5–11, 13) suspended within a mold made of several stacked sections. A substantially cylindrical bottom piece, positioned by radial fingers seated on the mold, forms the lower water passages; an upper cylindrical piece cooperates with towers on the bottom piece and with mold sections to complete a water path between the liner's inner and outer walls. Air ports are formed through the liner thickness by a mold section configured accordingly; the water passages extend upwardly through the circle of air ports between adjacent ports. Vertical, one-piece casting is stated to eliminate drafts, avoiding the water swirl, reduced water-path size, and potential leakage associated with banded, horizontally cast liners.
Source: https://patents.google.com/patent/[US5465778](/patent/US5465778)/en
Not established by the excerpt. The excerpt is truncated ("Two substantially identica…"). It does not supply the full claims, the complete detailed description, or the drawings themselves. Dates, assignee entries, and legal status are as listed on the source page and described there as assumptions, not legal conclusions. No litigation, ownership-transfer, validity, or prior-art analysis is provided or implied.
Generated 10/1/2026, 9:43:38 PM
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Assignment history
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Prior art
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