Patent US3628237A successfully refreshed from Google Patents.
US3628237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing an engine with a prefabricated cylinder liner
Assignee: Outboard Marine Corp
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Filing: 1969-12-23
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Granted: 1971-12-21
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Expires: 1989-12-23
Abstract
Abstract Disclosed herein is a method of constructing an engine having a cast iron cylinder liner and in which the engine block is die cast around the cylinder liner. The cylinder liner is cast with blind ports or recesses on the exterior surfaces. The outside and inside of the liner are machined to make the surfaces concentric, and the engine block is die cast around the liner by using a twopiece die with fingers which extend into the blind ports to prevent entry of the metal therein. The recesses are opened after the block is die cast by further machining of the inside surface of the liner.
Inventors
- 👤 Kurt F Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:03
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02; F16J10/04; B; B22; B22D; B22D19/00; B22D19/0009; F02; F02F; F02F1/00; F02F1/18; F02F1/22; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A method of constructing an engine cylinder block having a cylinder liner, said method comprising the steps of fabricating the cylinder liner with a blind recess in the exterior surface of the liner, machining the inside surface of the liner leaving a web of metal closing the recess, die casting an engine block around the liner with a die having a finger projecting into the recess, and machining the inside diameter of the liner to remove the web.
Claim 2
Independent Claim
78 words
A method of constructing an engine cylinder block having a cylinder liner, said method comprising the steps of fabricating the cylinder liner with a blind recess in the exterior surface of the liner, machining the inside surface of the liner leaving a web of metal closing the recess, die casting an engine block around the liner with a die having a finger projecting into the recess, and machining the inside diameter of the liner to remove the web.
Claim 3
Independent Claim
122 words
A method of constructing an engine cylinder block comprising casting a cylinder liner with an outwardly open blind port on the exterior surface of the liner, machining the inside surface of the liner to a predetermined first radius less than the radius of the bottom of the port, die casting a cylinder block around the liner with a finger in the die extending into the blind port to prevent entry of metal into the blind port to form a port in the block in registry with the blind port in the liner and machining the inside surface of the liner to a second radius greater than the radius of the liner port bottom, whereby to remove the bottom of the liner port.
Claim 4
Independent Claim
122 words
A method of constructing an engine cylinder block comprising casting a cylinder liner with an outwardly open blind port on the exterior surface of the liner, machining the inside surface of the liner to a predetermined first radius less than the radius of the bottom of the port, die casting a cylinder block around the liner with a finger in the die extending into the blind port to prevent entry of metal into the blind port to form a port in the block in registry with the blind port in the liner and machining the inside surface of the liner to a second radius greater than the radius of the liner port bottom, whereby to remove the bottom of the liner port.
Claim 5
Dependent Claim
26 words
A method in accordance with claim 2 plus the additional step of machining the outside surface of the liner prior to die casting the cYlinder block.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |