US4676064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-insulated port liner arrangement and method of fabrication
Assignee: Niterra Co Ltd
•
Filing: 1986-05-01
•
Granted: 1987-06-30
•
Expires: 2006-05-01
Abstract
Abstract A heat-insulated port liner arrangement for a device composed of a cast metal which is molded around the arrangement and includes a tubular port liner composed of a material including a ceramic, a first covering layer disposed on the outer surface of the liner and composed of a material including refractory fibers, and a second covering layer disposed on the outer surface of the first covering layer and composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Inventors
- 👤 Yoshinori Narita
- 👤 Takashi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:34
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/02; B; B22; B22D; B22D19/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272; Y10T29/49298; Y10T29/493; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A multi layered heat-insulated port liner for a device composed of a cast metal which is molded around the port liner comprising: a tubular port liner, said liner composed of a material including a ceramic and having a radially outwardly extending surface; a first covering layer, said first covering layer disposed on the radially outwardly extending surface of the liner and composed of a material including refractory fibers, said first covering layer having a radially outwardly extending surface; and a second covering layer, said second covering layer disposed on the radially outwardly extending surface of the first covering layer and composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Claim 2
Dependent Claim
121 words
A multi layered heat-insulated port liner for a device composed of a cast metal which is molded around the port liner comprising: a tubular port liner, said liner composed of a material including a ceramic and having a radially outwardly extending surface; a first covering layer, said first covering layer disposed on the radially outwardly extending surface of the liner and composed of a material including refractory fibers, said first covering layer having a radially outwardly extending surface; and a second covering layer, said second covering layer disposed on the radially outwardly extending surface of the first covering layer and composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Claim 3
Independent Claim
83 words
A method for making a multi-layered heat-insulated port liner for a device composed of a cast metal comprising: forming a tubular port liner composed of a material including a ceramic; covering the outer surface of the liner with a first covering composed of a material including refractory fibers; covering the outer surface of the first covering layer with a second covering layer composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Claim 4
Independent Claim
83 words
A method for making a multi-layered heat-insulated port liner for a device composed of a cast metal comprising: forming a tubular port liner composed of a material including a ceramic; covering the outer surface of the liner with a first covering composed of a material including refractory fibers; covering the outer surface of the first covering layer with a second covering layer composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Claim 5
Dependent Claim
51 words
A method as claimed in claim 2 wherein the step of covering the outer surface of the first covering layer further includes: placing the liner and first covering layer in a mold and pouring molten metal between the mold surface and the first covering layer to form the second covering layer.
Claim 6
Dependent Claim
38 words
A method as claimed in claim 2 wherein the step of covering the outer surface of the first covering layer further includes: dipping the liner and first covering layer in molten metal to form the second covering layer.
Claim 7
Dependent Claim
73 words
A method as claimed in claim 2 wherein the steps of covering the outer surface of the first covering layer further include: molding the second covering layer apart from the first covering layer so that the second covering layer is provided with an inside surface having a shape similar to the shape of the outside surface of the first covering layer; and assembling the second covering layer to overlie the first covering layer.
References Cited (Backward Citations)
US2225807A
Cited
FR1398301A
Cited
DE2354254A1
Cited
US3919755A
Cited
DE2404115A1
Cited
FR2272966A1
Cited
DE2602434A1
Cited
US4167207A
Cited
US4207660A
Cited
US4604779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |