US3920181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal hydroextractor
Assignee: Cima Impianti SpA
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Filing: 1974-07-10
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Granted: 1975-11-18
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Expires: 1994-07-10
Abstract
Abstract A continuous hydroextractor, for fibrous material, having a rotating frustum cone basket and a distributor of the material rotating with a different speed internally to the said basket. At least one rotating disc fixed to the distributor, having on its edge openings for the exit of the centrifuged material; the disc defining with the basket an annular gap for the exit of the liquid centrifuged, and a perforated filter band for the water placed superiorly and rotating with the abovementioned basket.
Inventors
- 👤 Berlando Lega
- 👤 Giannangiolo Cecchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:22
CPC Classifications
B; B04; B04B; B04B3/00; B04B11/00; B04B11/06; D; D06; D06B; D06B15/00; D06B15/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A continuously operating centrifugal hydroextractor of the type comprising a frustum cone rotating basket, and a mechanical distributor rotating at a speed different to that of the basket, placed coaxially internally to this latter, the said mechanical distributor comprising blades to guide the material from a central feed-point towards the peripheral surface of the said basket, and at least one disc placed perpendicularly to the axis of rotation of the basket, rotating fixedly to the said blades, the said disc having openings on its peripheral edge for the exit of the material, with each opening angularly spaced from the edge of the relative blade, said disc defining with the internal surface of the basket, an annular gap for the passage of the centrifuged liquid, and that the said basket has on the top a perforated filtering band, the said disc being below the perforated band.
Claim 2
Dependent Claim
145 words
A continuously operating centrifugal hydroextractor of the type comprising a frustum cone rotating basket, and a mechanical distributor rotating at a speed different to that of the basket, placed coaxially internally to this latter, the said mechanical distributor comprising blades to guide the material from a central feed-point towards the peripheral surface of the said basket, and at least one disc placed perpendicularly to the axis of rotation of the basket, rotating fixedly to the said blades, the said disc having openings on its peripheral edge for the exit of the material, with each opening angularly spaced from the edge of the relative blade, said disc defining with the internal surface of the basket, an annular gap for the passage of the centrifuged liquid, and that the said basket has on the top a perforated filtering band, the said disc being below the perforated band.
Claim 3
Dependent Claim
17 words
A hydroextractor according to claim 1, in which said disc is the upper edge of the basket.
Claim 4
Dependent Claim
27 words
A hydroextractor according to claim 1, in which said basket has the formation of a step in correspondence with the lower edge of the said filtering band.
Claim 5
Dependent Claim
22 words
A hydroextractor according to claim 1, in which the said filtering band is fixed removably to the upper edge of the backet.
Claim 6
Dependent Claim
19 words
A hydroextractor according to claim 1, in which the said basket has, underneath the disc, a smooth, imperforate wall.
Claim 7
Dependent Claim
32 words
A hydroextractor according to claim 5, in which the said smooth imperforate wall, of the basket continues for a tract beyond the disc to the lower edge of the said filtering band.
Claim 8
Dependent Claim
21 words
A hydroextractor according to claim 3, in which the said step forms a surface, substantially perpendicular to the said filtering band.
Claim 9
Dependent Claim
19 words
A hydroextractor according to claim 4, in which the said filtering band is a perforated band in metal plate.
Claim 10
Dependent Claim
16 words
A hydroextractor according to claim 4, in which the said filter band is made of netting.
Claim 11
Dependent Claim
32 words
A hydroextractor according to claim 1, in which the said disc has, along the gap of passage of the centrifuged liquid, deflecting elements which direct the liquid towards the said filter band.
Claim 12
Dependent Claim
51 words
A hydroextractor according to claim 10, in which the said deflector elements are placed along a tract of the peripheral edge of the disc placed posteriorly to each opening for the exit of the material, with reference to the direction of rotation of said disc with respect to the rotating basket.
Claim 13
Dependent Claim
31 words
A hydroextractor according to claim 10, in which the said deflector elements are made of a single flexible deflector element placed above and along all the peripheral edge of the disc.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |