US3948778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus
Assignee: Chemap AG
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Filing: 1974-07-17
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Granted: 1976-04-06
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Expires: 1994-07-17
Abstract
Abstract In a filter apparatus of the type having a receptacle and an upright hollow shaft which is rotatable in the receptacle, a plurality of substantially horizontal filter elements are mounted on the shaft axially spaced thereon and rotatable with the shaft. Each of the filter elements includes a plate member which is imperforate and a filter cloth which overlies an upwardly facing side of the plate member. Spacers are located between each pair of adjacent filter elements, and each spacer includes a ring portion which surrounds the shaft and spaces the adjacent filter elements from one another, and a plurality of spoke portions which extend outwardly from the ring portion and of which each has an upper edge engaging a downwardly facing side of the plate member of the upper filter element of the pair, and a lower edge engaging the filter cloth on the lower filter element of the pair, in order to hold the filter cloth against the associated plate member.
Inventors
- 👤 Hans Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:29
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/23; B01D33/44; B01D33/48; B01D33/52; B01D33/56
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
In a filter apparatus, a combination comprising a receptacle having an inlet for fluid to be filtered; an upright hollow shaft rotatably mounted in said receptacle; drive means connected to said shaft for rotating the same; a plurality of filter elements mounted on said shaft axially spaced from each other, each of said filter elements including a plate member and a filter cloth overlying an upwardly facing side of said plate member defining therewith a space communicating with the interior of said hollow shaft; outlet means for filtered fluid in said receptacle communicating with the interior of said upright hollow shaft at the lower end of the latter; and spacing means located between each pair of adjacent filter elements and including a ring portion surrounding said shaft and a plurality of spoke portions projecting outwardly from said ring portion and each having an upper edge engaging a downwardly facing said side of the plate member, and a lower edge engaging the filter cloth on the lower filter of the pair, so as to hold said filter cloth against the associated plate member of said lower filter element.
Claim 2
Dependent Claim
187 words
In a filter apparatus, a combination comprising a receptacle having an inlet for fluid to be filtered; an upright hollow shaft rotatably mounted in said receptacle; drive means connected to said shaft for rotating the same; a plurality of filter elements mounted on said shaft axially spaced from each other, each of said filter elements including a plate member and a filter cloth overlying an upwardly facing side of said plate member defining therewith a space communicating with the interior of said hollow shaft; outlet means for filtered fluid in said receptacle communicating with the interior of said upright hollow shaft at the lower end of the latter; and spacing means located between each pair of adjacent filter elements and including a ring portion surrounding said shaft and a plurality of spoke portions projecting outwardly from said ring portion and each having an upper edge engaging a downwardly facing said side of the plate member, and a lower edge engaging the filter cloth on the lower filter of the pair, so as to hold said filter cloth against the associated plate member of said lower filter element.
Claim 3
Dependent Claim
16 words
A combination as defined in claim 1, wherein said spoke portions resemble strips standing on edge.
Claim 4
Dependent Claim
20 words
A combination as defined in claim 1, wherein said spoke portions are straight and extend radially from said ring portion.
Claim 5
Dependent Claim
19 words
A combination as defined in claim 1, wherein said spoke portions are curved in circumferential direction of said shaft.
Claim 6
Dependent Claim
13 words
A combination as defined in claim 2, wherein said spoke portions are imperforate.
Claim 7
Dependent Claim
13 words
A combination as defined in claim 2, wherein said spoke portions are perforated.
Claim 8
Dependent Claim
18 words
A combination as defined in claim 1, wherein said spoke portions are fixedly connected with said ring portion.
Claim 9
Dependent Claim
17 words
A combination as defined in claim 1, wherein said spoke portions are separate from said ring portion.
Claim 10
Dependent Claim
17 words
A combination as defined in claim 1, wherein at least said spoke portions are of metallic material.
Claim 11
Dependent Claim
18 words
A combination as defined in claim 1, wherein at least said spoke portions are of synthetic plastic material.
References Cited (Backward Citations)
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |