Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
218 words
Arrangement for elongated sedimentation basins and similar installations for removing deposited sediment or other sludge from the bottom of the basin, characterised in that it comprises a traverser (9) which is arranged to be capable of being moved from a starting position, usually in connection with one short end of the basin, to a receiving end, e.g. to a sludge hopper or the like, on a track (8) arranged-in the basin (1) at such a depth under the surface (2) of the water that also the traverser (9) which is transported along the track is located completely below the surface of the water (2), that the traverser at its front end and rear end is provided with one or several scrapers (19 and 20 respectively) or corresponding cleaning devices which extend essentially over the width of the basin (1) and which in the effective cleaning position when the traverser is moved towards the said sludge hopper (7) or the like are positioned essentially vertically towards the bottom (3) of the basin, and that the said scrapers (19, 20) are so arranged that they can be swivelled upwards from the said essentially vertical operating position to an essentially horizontal transport position (19', 20'), when the traverser is to be moved backwards in the opposite direction to its starting point.
Claim 2
Dependent Claim
218 words
Arrangement for elongated sedimentation basins and similar installations for removing deposited sediment or other sludge from the bottom of the basin, characterised in that it comprises a traverser (9) which is arranged to be capable of being moved from a starting position, usually in connection with one short end of the basin, to a receiving end, e.g. to a sludge hopper or the like, on a track (8) arranged-in the basin (1) at such a depth under the surface (2) of the water that also the traverser (9) which is transported along the track is located completely below the surface of the water (2), that the traverser at its front end and rear end is provided with one or several scrapers (19 and 20 respectively) or corresponding cleaning devices which extend essentially over the width of the basin (1) and which in the effective cleaning position when the traverser is moved towards the said sludge hopper (7) or the like are positioned essentially vertically towards the bottom (3) of the basin, and that the said scrapers (19, 20) are so arranged that they can be swivelled upwards from the said essentially vertical operating position to an essentially horizontal transport position (19', 20'), when the traverser is to be moved backwards in the opposite direction to its starting point.
Claim 3
Dependent Claim
52 words
Arrangement as in claim 1, characterised in that the said scrapers (19, 20) are arranged to be swivelled downwards and upwards by means of a cable (25) which at the same time is arranged to pull the traverser forwards towards or respectively rearwards away from the said sludge hopper or the like.
Claim 4
Dependent Claim
41 words
Arrangement as in claim 2 characterised in that the scrapers are arranged to be swivelled into the horizontal position in that the same cable is pulled in the opposite direction so as to lead the traverser back to its initial position.
Claim 5
Dependent Claim
34 words
Arrangement in accordance with any of claims 1-3 charac-terised in that the forward and rear scrapers (19, 20) are joined by one or several cables (35) arranged to transmit traction forces between the scrapers.
Claim 6
Dependent Claim
35 words
Arrangement in accordance with any of claims 1-4, characterised in that when the scrapers (19, 20) are in the vertical scraping position their upper portions are pressed against supporting devices (17, 18) on the traverser.
Claim 7
Dependent Claim
36 words
Arrangement as in claim 5, characterised in that the scrapers are hinge-connected with the said supporting devices (17, 18), preferably in the vicinity of a line between the upper/ forward and lower/rear edges of the scrapers.
Claim 8
Dependent Claim
38 words
Arrangement as in any of the preceding claims, characterised in that the said tension cable (25), the connecting cable/cables (35) between the scrapers (19, 20) and preferably also one of the actual scrapers together form an endless loop.
Claim 9
Dependent Claim
47 words
Arrangement in accordance with any of the preceding claims, characterised by an upper scraper (60) which is mounted on the said traverser being arranged to adopt the working position in the surface layer of the basin by making the bottom scrapers (19, 20) change their working position.
Claim 10
Dependent Claim
48 words
Arrangement as in claim 8, characterised in that the surface scraper is arranged to adopt the working position in the surface layer by means of actuating devices (52, 53, 57, 58, 59) connected to the bottom scrapers (19) or to the connecting cable/cables 35 between the bottom scrapers.
Claim 11
Dependent Claim
40 words
Arrangement as in claim 9, characterised in that the surface scraper is arranged to adopt the said working position by being lifted up or swivelled up or dropped or swivelled downwards by the said actuating devices into the surface layer.
Claim 12
Dependent Claim
85 words
Arrangement as in any of claims 1-10, characterised in that the traverser is so arranged that it can be moved to and fro in the basin by means of the said cable which is pretensioned, and that devices (80) are provided which are arranged to stop the cable drive if the cable tension drops considerably and if within a certain period of time governed by the design of the said device, preferably to 2 minutes, the cable tension does not revert to its normal value.
Claim 13
Dependent Claim
112 words
Arrangement as in claim ti, characterised in that it comprises a tensioning arrangement (80, 77, 70) which ensures that the cable (25) in kept under tension by means of a springloaded guide wheel (30), that the guide wheel (30) performs a translatory movement when the cable tension drops, and that it comprises devices which ensure that the cable drive ceases when the said spring loaded tensioning pulley (30) is moved from its normal operating position to a position which corresponds to lower cable tension and if the said tensioning pulley (30) has not, within a certain period of time which is preferably 1 to 2 minutes, reverted to its normal operating position.
Claim 14
Dependent Claim
54 words
Arrangement as in claim 12, characterised in that the said devices (78) which stop the cable drive comprise a flux breaker with delayed breaking function which can break a flux which controls the cable drive, whereby the said flux breaker is arranged to be actuated by a translatory displacement of the guide pulley 30.
Claim 15
Dependent Claim
22 words
Arrangement as in claim 13, characterised in that the said flux breaker-(78) comprises an electrical circuit breaker with delayed circuit breaking function.