Patent US2648894A successfully refreshed from Google Patents.
Patent US3780747A successfully refreshed from Google Patents.
US3780747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning filter plates and the like
Assignee: ABEL & Co PUMPEN AND MASCHINENBAU GmbH
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Filing: 1972-04-05
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Granted: 1973-12-25
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Expires: 1992-04-05
Abstract
Abstract A stack of flat plates consisting of rectangular frames spanned by filter cloth, normally held together under pressure, is overlain by a rail extending lengthwise of the stack and carrying a transverse beam on which a carriage supports a cleaning unit introduceable from the side into the space between two separated filter plates. The unit comprises a pair of horizontal or vertical spray tubes, each extending over the full width or height of the filter cloth, which are vertically or horizontally movable with the aid of a pair of guide rollers riding on opposide edge portions of the frame when driven apart by a fluidoperated expander. The correct positioning of the beam with reference to the separated filter plates can be ascertained by a centering device adapted to be lowered into the intervening space, this device including two spreadable arms terminating in respective sensing rollers.
Inventors
- 👤 W Stadie
- 👤 K Sperling
- 👤 R Deubner
- 👤 W Pattberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:11
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/172; B01D25/32; B01D25/322; B01D25/38; B01D25/386
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
159 words
An apparatus for cleaning a set of stacked plates guided for separation in longitudinal direction of the stack to form a space between a pair of plates to be cleaned, comprising: mounting means alignable with the space between any pair of separated plates; support means movable on said mounting means in a direction parallel to said plates; a pair of nozzle carriers on said support means extending alongside each other for introduction into the intervening space, said support means being operable to displace said nozzle carriers within said space to sweep substantially the entire surface of said plates; a source of cleaning fluid under pressure connected to said nozzle carriers; contact means on said nozzle carriers engageable with respective marginal portions of the separated plates for guidance therealong; and spreading means on said support means connected with said nozzle carriers for driving same apart within said space to bring said contact means thereof to bear upon said marginal portions.
Claim 2
Independent Claim
159 words
An apparatus for cleaning a set of stacked plates guided for separation in longitudinal direction of the stack to form a space between a pair of plates to be cleaned, comprising: mounting means alignable with the space between any pair of separated plates; support means movable on said mounting means in a direction parallel to said plates; a pair of nozzle carriers on said support means extending alongside each other for introduction into the intervening space, said support means being operable to displace said nozzle carriers within said space to sweep substantially the entire surface of said plates; a source of cleaning fluid under pressure connected to said nozzle carriers; contact means on said nozzle carriers engageable with respective marginal portions of the separated plates for guidance therealong; and spreading means on said support means connected with said nozzle carriers for driving same apart within said space to bring said contact means thereof to bear upon said marginal portions.
Claim 3
Dependent Claim
14 words
An apparatus as definined in claim 1 wherein said nozzle carriers are perforated tubes.
Claim 4
Dependent Claim
46 words
An apparatus as defined in claim 2 wherein the plates to be cleaned are generally rectangular, said tubes extending parallel to a major dimension of said plates and being displaceable with said support means in a direction parallel to the other major dimension of said plates.
Claim 5
Dependent Claim
42 words
An apparatus as defined in claim 3 wherein the plates to be cleaned have frames spanned by filter cloth, said contact means comprising a pair of guide rollers on opposite ends of each tube engageable with opposite edge portions of said frame.
Claim 6
Dependent Claim
55 words
An apparatus as defined in claim 3 wherein said plates are horizontally stacked and are provided with a rail extending longitudinally above the stack, said plates being suspended from said rail, said mounting means being movable along said rail and including a beam perpendicular thereto, said support means comprising a carriage guided along said beam.
Claim 7
Dependent Claim
25 words
An apparatus as defined in claim 5 wherein said support means further comprises a column suspended from said carriage and linked with said nozzle carriers.
Claim 8
Dependent Claim
39 words
An apparatus as defined in claim 6 wherein said beam bridges a pair of rails overlying respective stacks of plates, said nozzle carriers being swingable about said column for selective introduction between the plates of either of said stacks.
Claim 9
Dependent Claim
46 words
An apparatus as defined in claim 6 wherein said spreading means comprises a linkage articulated to said tubes, spring means anchored to said linkage for drawing said carriers toward each other, and fluid-actuated thrust means for displacing said linkage against the force of said spring means.
Claim 10
Dependent Claim
26 words
An apparatus as defined in claim 8 wherein said thrust means is provided with a branch connection to said source of cleaning fluid for actuation thereby.
Claim 11
Dependent Claim
35 words
An apparatus as defined in claim 6 wherein said tubes are substantially vertical but are hinged to said column for swinging about a horizontal axis to clear a lateral bottom support for said filter plates.
Claim 12
Dependent Claim
22 words
An apparatus as defined in claim 6 wherein said tubes are substantially horizontal, said column comprising an extensible pair of telescoped members.
Claim 13
Dependent Claim
31 words
An apparatus as defined in claim 1 wherein said mounting means includes a centering device suspended from said beam for ascertaining the relative position of said beam and said separated plates.
Claim 14
Dependent Claim
43 words
An apparatus as defined in claim 12 wherein said centering device comprises a pair of arms swingable in a longitudinal plane of said stack, sensing means at the ends of said arms and driving means for urging said arms in opposite longitudinal directions.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |