Patent US3655056A successfully refreshed from Google Patents.
US3655056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter element for upright filter press
Assignee: Eberhard Hoesch and Soehne GmbH and Co
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Filing: 1970-04-23
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Granted: 1972-04-11
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Expires: 1990-04-23
Abstract
Abstract In an upright filter press filter elements are arranged in stacked superimposed relationship. Each filter element has a frame having an upper side and a lower side and carrying filter means. A liquid-conveying channel is provided in each frame and terminates at a lateral side thereof for conveying expressed liquid. A lateral tubular extension is provided on each frame having a lower portion protruding downwardly beyond the lower side and a passage oriented in upright direction and communicating with the channel. The passage has at the upper side of the frame an inlet whose inner diameter is larger than the outer diameter of the lower portion so that the lower portion of the extension on the respectively upper filter element is telescopically receivable in the inlet of the passage of the extension of the respectively lower filter element.
Inventors
- 👤 Alfons Schotten
- 👤 Franz Heimbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:25
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/164; B01D25/1645; B01D25/21; B01D25/215; B01D25/28; B01D25/282; B01D25/285; B01D25/30; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
194 words
In an upright filter press, in combination, at least two superposed filter elements each comprising a normally horizontally oriented frame having an upper side and a lower side, said filter elements being relatively movable between two positions in which they are vertically spaced by respectively smaller and larger distances; filter means in said frame; a liquid-conveying channel in said frame having an intake opening for receiving liquid which has filtered through said filter means and terminating at a lateral side of said frame for conveying filtered liquid; and a lateral tubular extension on said frame and having a lower projection projecting downwardly beyond the lower side thereof to an extent greater than said larger distance, said extension having a passage oriented in upright direction and communicating with said channel, and said passage having at said upper side of said frame an inlet whose inner diameter is larger than the outer diameter of said lower projection whereby said lower projection of the extension on the upper of said filter elements is telescopically received in the inlet of the passage in said extension of the lower of said filter elements in both of said two positions.
Claim 2
Dependent Claim
194 words
In an upright filter press, in combination, at least two superposed filter elements each comprising a normally horizontally oriented frame having an upper side and a lower side, said filter elements being relatively movable between two positions in which they are vertically spaced by respectively smaller and larger distances; filter means in said frame; a liquid-conveying channel in said frame having an intake opening for receiving liquid which has filtered through said filter means and terminating at a lateral side of said frame for conveying filtered liquid; and a lateral tubular extension on said frame and having a lower projection projecting downwardly beyond the lower side thereof to an extent greater than said larger distance, said extension having a passage oriented in upright direction and communicating with said channel, and said passage having at said upper side of said frame an inlet whose inner diameter is larger than the outer diameter of said lower projection whereby said lower projection of the extension on the upper of said filter elements is telescopically received in the inlet of the passage in said extension of the lower of said filter elements in both of said two positions.
Claim 3
Dependent Claim
30 words
In a filter press as defined in claim 1, said extensions being discrete members each of which is fluid-tightly but releasably connected with the frame of the respective Filter element.
Claim 4
Dependent Claim
21 words
In a filter press as defined in claim 2; further comprising connecting means connecting the respective extensions with the associated frame.
Claim 5
Dependent Claim
38 words
In a filter press as defined in claim 1; further comprising sealing means sealing the juncture between said extensions when the lower projection of one of the same is telescopically received in said passage of the other extension.
Claim 6
Dependent Claim
58 words
In a filter press as defined in claim 4, said extensions having an outer circumferential surface provided with a radial shoulder, and said sealing means being an annular sealing member surrounding each extension and abutting against said shoulder so as to be in sealing engagement with the same and the respective other extension when the same are telescoped.
Claim 7
Dependent Claim
29 words
In a filter press as defined in claim 1, said extensions having outer circumferential surfaces which at least in part conically converge in direction axially away from said inlet.
Claim 8
Dependent Claim
78 words
In a filter press as defined in claim 1, each of said extensions having an outer and an inner circumferential surface and a bore extending between them and communicating with the channel of the associated frame; and further comprising a recess on that portion of the respective outer surface which faces the bore of the respectively other extension when received in the same, so as to permit free entry of liquid through said bore into the associated passage.
Claim 9
Dependent Claim
29 words
In a filter press as defined in claim 7; further comprising a partially circumferentially extending groove provided in said inner circumferential surface and each communicating with the associated bore.
Claim 10
Dependent Claim
30 words
In a filter press as defined in claim 1; further comprising a sealing element between the respective extension and the associated frame for establishing a fluid-tight connection between the same.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |