US4413970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary scrapers
Assignee: Owens Corning
•
Filing: 1981-02-27
•
Granted: 1983-11-08
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Expires: 2001-02-27
Abstract
Abstract Scraper apparatus, preferably for pelletizers is disclosed, the scraper being adapted with a plurality of individual blades rotatable into contact with the walls of the pelletizer and removable after excessive wear.
Inventors
- 👤 Stephen Seng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/14; B01F; B01F27/00; B01F27/05; B01F27/09; B01F27/091; C; C03; C03B; C03B1/00; C03B1/02; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
In a pelletizer for converting particulate material into pellets, having a need to remove build-up of said material from the inside walls of said pelletizer, the improvement comprising: (a) a rotatable scrapper support; (b) a blade carrier afixed to said support, said carrier being adapted with a plurality of ports for the positioning of a plurality of scraper blades therein, at least one of said scraper blades extending horizontally from one of said ports and at least one of said scraper blades extending angularly from another of said ports.
Claim 2
Dependent Claim
89 words
In a pelletizer for converting particulate material into pellets, having a need to remove build-up of said material from the inside walls of said pelletizer, the improvement comprising: (a) a rotatable scrapper support; (b) a blade carrier afixed to said support, said carrier being adapted with a plurality of ports for the positioning of a plurality of scraper blades therein, at least one of said scraper blades extending horizontally from one of said ports and at least one of said scraper blades extending angularly from another of said ports.
Claim 3
Dependent Claim
24 words
The pelletizer of claim 1 in which the end of one of said blades extending from one of said ports has a rounded edge.
Claim 4
Dependent Claim
24 words
The pelletizer of claim 1 in which the end of one of said blades extending from one of said ports has a T-shape configuration.
References Cited (Backward Citations)
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US3316585A
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US4099899A
Cited
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US4214863A
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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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |