Patent US3900188A successfully refreshed from Google Patents.
US3900188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw extruder housing with a wear-resistant lining
Assignee: Werner and Pfleiderer GmbH
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Filing: 1973-11-13
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Granted: 1975-08-19
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Expires: 1993-11-13
Abstract
Abstract There is disclosed a method of producing a wear-resistant lining in the housing of a screw extruder. This method provides that a cylindrical sleeve of wear-resistant material is inserted into the extruder housing. The sleeve is dimensioned so that space is left between the outside of the sleeve and the housing and this space is filled with a hardening filler material which upon hardening secures the sleeve within the housing. There is also disclosed a screw extruder including a sleeve made of a wear-resistant material. This sleeve is secured in the correct position in the housing by a rigid filler material filling a space left between the outside of the sleeve and the housing.
Inventors
- 👤 Wilhelm Seufert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:07
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/0009; B29; B29B; B29B7/00; B29B7/80; B29B7/82; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/6801; B60; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/48; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29C48/03; B60K2006/4816; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A screw extruder comprising in combination: an elongate housing including a lengthwise extending space; a sleeve made of a wear-resistant material inserted into said space, the inner peripheral outline of the housing being larger than the outer peripheral outline of the sleeve thereby defining within the housing a space intermediate the inside of the housing and the outside of the sleeve; and a hardened filler material filling said intermediate space, said filler having a melting point lower than the materials of which the housing and the sleeve are made.
Claim 2
Dependent Claim
89 words
A screw extruder comprising in combination: an elongate housing including a lengthwise extending space; a sleeve made of a wear-resistant material inserted into said space, the inner peripheral outline of the housing being larger than the outer peripheral outline of the sleeve thereby defining within the housing a space intermediate the inside of the housing and the outside of the sleeve; and a hardened filler material filling said intermediate space, said filler having a melting point lower than the materials of which the housing and the sleeve are made.
Claim 3
Dependent Claim
51 words
The screw extruder according to claim 1 wherein said sleeve comprises two parts, each of said parts having the shape of a hollow cylindrical member including a lengthwise slot in its wall, and wherein joining means join said members in parallel relationship along the edges defining said slots in the members.
Claim 4
Dependent Claim
19 words
The screw extruder according to claim 2 wherein said joining means comprise said hardened filler filling said intermediate space.
Claim 5
Dependent Claim
27 words
The screw extruder according to claim 1 wherein said filler material includes lengthwise ducts for passing therethrough a medium for controlling the operational temperature of said sleeve.
Claim 6
Dependent Claim
34 words
The screw extruder according to claim 1 wherein said sleeve has lengthwise grooves in its outer surface, said grooves constituting ducts for passing therethrough a medium for controlling the operational temperature of the sleeve.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |