US4746220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw type extruding or kneading machine and screw used therein
Assignee: Noritake Co Ltd
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Filing: 1986-04-15
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Granted: 1988-05-24
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Expires: 2006-04-15
Abstract
Abstract The outer periphery of a screw and the inside of a barrel of a screw type extruding or kneading machine are made of ceramics, to improve the abrasion and heat resistances thereof, so that the screw and the barrel will operate for a longer life time even if a hard material or a material containing a hard material is worked.
Inventors
- 👤 Kiyoshi Sukai
- 👤 Keizo Ichii
- 👤 Shigeru Takane
- 👤 Takayuki Yoshikawa
- 👤 Hiroshi Inada
- 👤 Takao Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:00
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/428; B29C; B29C48/00; B29C48/25; B29C48/256; B29C48/2564; B29C48/36; B29C48/50; B29C48/505; B29C48/507; B29C48/68; B29C48/03; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29K2105/16; B29K2909/00; B29K2909/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
175 words
A screw type machine that works a material, said machine comprising a screw axially disposed for revolving in a vessel, wherein: (a) at least a part of the outside surface of said screw that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said screw comprises a plurality of metal members; (b) at least a part of the inside surface of said vessel that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said vessel comprises a plurality of metal members; (c) said ceramic members of both said screw and said vessel are dismountable and replaceable; and (d) buffer means for distributing stress uniformly, for absorbing stress caused by heat changes, and for absorbing mechanical shocks are interposed between said ceramic members and said metal members in both said screw and said vessel, said buffer means being a heat resistance synthetic film selected from the group consisting of polyimide, polyamide, polysulfone, and synthetic rubber films.
Claim 2
Dependent Claim
175 words
A screw type machine that works a material, said machine comprising a screw axially disposed for revolving in a vessel, wherein: (a) at least a part of the outside surface of said screw that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said screw comprises a plurality of metal members; (b) at least a part of the inside surface of said vessel that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said vessel comprises a plurality of metal members; (c) said ceramic members of both said screw and said vessel are dismountable and replaceable; and (d) buffer means for distributing stress uniformly, for absorbing stress caused by heat changes, and for absorbing mechanical shocks are interposed between said ceramic members and said metal members in both said screw and said vessel, said buffer means being a heat resistance synthetic film selected from the group consisting of polyimide, polyamide, polysulfone, and synthetic rubber films.
Claim 3
Dependent Claim
21 words
A machine as recited in claim 1 wherein said buffer means is also interposed between said ceramic members in said screw.
Claim 4
Dependent Claim
21 words
A machine as recited in claim 1 wherein said buffer means is also interposed between said ceramic members in said vessel.
Claim 5
Dependent Claim
20 words
A machine as recited in claim 1 wherein a spiral groove is formed in the outside surface of said screw.
Claim 6
Dependent Claim
30 words
A machine as recited in claim 1 wherein one of said metal members in said screw is an axle on which said ceramic members of said screw are removably mounted.
Claim 7
Dependent Claim
13 words
A machine as recited in claim 1 wherein said machine is an extruder.
Claim 8
Dependent Claim
13 words
A machine as recited in claim 1 wherein said machine is a kneader.
Claim 9
Dependent Claim
170 words
A screw type machine that works a material, said machine comprising a screw axially disposed for revolving in a vessel, wherein: (a) at least a part of the outside surface of said screw that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said screw comprises a plurality of metal members; (b) at least a part of the inside surface of said vessel that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said vessel comprises a plurality of metal members; (c) said ceramic members of both said screw and said vessel are dismountable and replaceable; and (d) buffer means for distributing stress uniformly, for absorbing stress caused by heat changes, and for absorbing mechanical shocks are interposed between said ceramic members and said metal members in both said screw and said vessel, said buffer means being a foil selected from the group consisting of copper foil and aluminum foil.
Claim 10
Dependent Claim
170 words
A screw type machine that works a material, said machine comprising a screw axially disposed for revolving in a vessel, wherein: (a) at least a part of the outside surface of said screw that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said screw comprises a plurality of metal members; (b) at least a part of the inside surface of said vessel that comes into contact with the material to be worked comprises a plurality of ceramic members and the remainder of said vessel comprises a plurality of metal members; (c) said ceramic members of both said screw and said vessel are dismountable and replaceable; and (d) buffer means for distributing stress uniformly, for absorbing stress caused by heat changes, and for absorbing mechanical shocks are interposed between said ceramic members and said metal members in both said screw and said vessel, said buffer means being a foil selected from the group consisting of copper foil and aluminum foil.
Claim 11
Dependent Claim
21 words
A machine as recited in claim 8 wherein said buffer means is also interposed between said ceramic members in said screw.
Claim 12
Dependent Claim
21 words
A machine as recited in claim 8 wherein said buffer means is also interposed between said ceramic members in said vessel.
Claim 13
Dependent Claim
20 words
A machine as recited in claim 8 wherein a spiral groove is formed in the outside surface of said screw.
Claim 14
Dependent Claim
30 words
A machine as recited in claim 8 wherein one of said metal members in said screw is an axle on which said ceramic members of said screw are removably mounted.
Claim 15
Dependent Claim
13 words
A machine as recited in claim 8 wherein said machine is an extruder.
Claim 16
Dependent Claim
13 words
A machine as recited in claim 8 wherein said machine is a kneader.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |