US3894486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for obtaining a selectable dehydrating pressure in dehydrating machines
Assignee: ANDRITZ-RUTHNER Inc
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Filing: 1973-08-13
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Granted: 1975-07-15
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Expires: 1993-08-13
Abstract
Abstract This invention relates to an improvement in a dehydrating machine for the separation of solids from suspensions including a first group of rolls which in wedge position perform a preliminary dehydration and a second group of rolls which perform the main dehydration, said rolls being enclosed by upper and lower screen bands, the improvement comprising means whereby the tension of the screen bands may be varied, and means whereby the wedge angle may be varied.
Inventors
- 👤 Richard Sparowitz
- 👤 Alois Wohlfarter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:53
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
In a dehydrating machine for the separation of solids from a suspension including a first group of rolls which in wedge position perform a preliminary dehydration and a second group of rolls which perform the main dehydration, said rolls being enclosed by upper and lower screen bands, the improvement comprising means whereby the tension of the screen bands may be continuously varied and means whereby the wedge angle may be continuously varied as a function of the specific dehydration properties of the suspension.
Claim 2
Dependent Claim
83 words
In a dehydrating machine for the separation of solids from a suspension including a first group of rolls which in wedge position perform a preliminary dehydration and a second group of rolls which perform the main dehydration, said rolls being enclosed by upper and lower screen bands, the improvement comprising means whereby the tension of the screen bands may be continuously varied and means whereby the wedge angle may be continuously varied as a function of the specific dehydration properties of the suspension.
Claim 3
Dependent Claim
30 words
A dehydrating machine according to claim 1 in which said means for varying the tension of the screen bands are tension means mounted between said bands and the machine frame.
Claim 4
Dependent Claim
34 words
A dehydrating machine according to claim 1 in which said means for varying the wedge angle is tension means mounted between a support for upper rolls in said wedge portion, and the machine frame.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |