US4396511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus for curved filter screens
Assignee: Aqseptence Group GmbH
•
Filing: 1980-11-12
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Granted: 1983-08-02
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Expires: 2000-11-12
Abstract
Abstract A boom is mounted for pivotal movement about the center from which the arcuate shape of a filter screen is struck and a cleaner is pivoted to the free end of the boom. A single reversible drive unit is operatively connected to the cleaner for exerting a force thereto to tilt the cleaner toward a cleaning position. A stop operatively and rigidly connects the cleaner to the boom to transmit force from the cleaner to the boom as a pivotal force only after the cleaner is tilted to the cleaning position to thus rigidly connect the drive unit and cleaner to the boom.
Inventors
- 👤 Karl Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:08
CPC Classifications
E; E02; E02B; E02B8/00; E02B8/02; E02B8/023; E02B8/026
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
Cleaning apparatus for a filter screen comprising: (a) a curved filter screen in the shape of a circular arc, (b) a boom mounted for free pivotal movement about the center of the circular arc of said screen, (c) a cleaner pivotally connected to the end of said boom and movable up and down relative to said screen upon pivotal movement of said boom and being tiltably relative to said boom, (d) a single reversible drive unit operatively connected by a connecting rod to said cleaner for exerting a force thereto to tilt said cleaner toward a cleaning position on the screen and to a return position tilted away from the screen, and (e) stop means operatively and rigidly connecting said cleaner to said boom and transmitting said force from said cleaner to said boom as a pivotal force only after said cleaner is tilted to said cleaning position and said return position, respectively.
Claim 2
Dependent Claim
153 words
Cleaning apparatus for a filter screen comprising: (a) a curved filter screen in the shape of a circular arc, (b) a boom mounted for free pivotal movement about the center of the circular arc of said screen, (c) a cleaner pivotally connected to the end of said boom and movable up and down relative to said screen upon pivotal movement of said boom and being tiltably relative to said boom, (d) a single reversible drive unit operatively connected by a connecting rod to said cleaner for exerting a force thereto to tilt said cleaner toward a cleaning position on the screen and to a return position tilted away from the screen, and (e) stop means operatively and rigidly connecting said cleaner to said boom and transmitting said force from said cleaner to said boom as a pivotal force only after said cleaner is tilted to said cleaning position and said return position, respectively.
Claim 3
Dependent Claim
73 words
Cleaning apparatus as defined in claim 1 in which said stop means determining the cleaning position of the cleaner is positioned so that it terminates at the end of the upward movement of the boom and the cleaner so that after being released from the stop means the cleaner is once more tiltable relative to the boom into a throw-off position by the force of the drive unit continuing to act upon it.
Claim 4
Dependent Claim
38 words
Cleaning apparatus as defined in claim 1 in which the stop means defining the cleaning position of the cleaner comprises a guide member on the screen in position to be engaged by a contact element on the cleaner.
Claim 5
Dependent Claim
52 words
Cleaning apparatus as defined in claim 1 in which the stop means determining the cleaning position of the cleaner comprises cooperating engaging members which detachably and operatively anchor said cleaner relative to said boom and is releasable by a fixed stop mounted adjacent the end of the upward travel of said boom.
Claim 6
Dependent Claim
23 words
Cleaning apparatus as defined in claim 1 in which the stop determining the return position of the cleaner is mounted on the boom.
Claim 7
Dependent Claim
45 words
Cleaning apparatus as defined in claim 1, 2, 3 or 5 in which the drive unit is connected to said connecting rod by a crank arm mounted coaxially with the boom so that the crank arm, connecting rod, cleaner and boom constitute a four-bar linkage.
Claim 8
Dependent Claim
15 words
Cleaning apparatus as defined in claim 6 in which the connecting rod crosses the boom.
Claim 9
Dependent Claim
32 words
Cleaning apparatus as defined in claim 1, 2, 3 or 5 in which said boom having the cleaner pivotally connected thereto is balanced with reference to its pivot point by a counterweight.
Claim 10
Dependent Claim
28 words
Cleaning apparatus as defined in claim 1, 2 or 3 in which the boom is operatively connected to a brake which is operative in its downward pivoting direction.
Claim 11
Dependent Claim
40 words
Cleaning apparatus as defined in claim 1, 2, 3 or 5 in which the drive unit urges the cleaner toward the screen and pivots the cleaner in a direction opposite to the upward pivotal direction of movement of the boom.
Claim 12
Dependent Claim
44 words
Cleaning apparatus as defined in claim 1, 2, 3 or 5 in which the direction of engagement of the working edge of the cleaner is oriented at an acute angle relative to a line approximately tangent to the arcuate interior profile of the screen.
Claim 13
Dependent Claim
23 words
Cleaning apparatus as defined in claim 11 in which the cleaner is in the form of a trough with discharge apertures for water.
Claim 14
Dependent Claim
17 words
Cleaning apparatus as defined in claim 3 in which the guide member extends upwardly beyond the screen.
Claim 15
Dependent Claim
20 words
Cleaning apparatus as defined in claim 13 in which the guide member comprises two outermost grating bars of the screen.
Claim 16
Dependent Claim
23 words
Cleaning apparatus as defined in claim 2 in which a roller member supports the cleaner during the tilting movement into the throw-off position.
Claim 17
Dependent Claim
36 words
Cleaning apparatus as defined in claim 1, 2, 3, 5, 13, 14 or 15 in which limit switches are associated with the limit positions of the boom and/or of the cleaner to reverse the drive unit.
References Cited (Backward Citations)
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Cited
US1794504A
Cited
US2009005A
Cited
US2086821A
Cited
US3909411A
Cited
US4107040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |