Abstract: A backflushing filter for filtering oil includes filter candles 22 which are open at both ends 24, 34 and disposed around a rotary shaft 1 in a filter housing. A cleaning device is moved in conjunction with the rotary shaft and includes upper and lower flushing cocks communicating with an outflow valve via the shaft for cleaning the candles during a backflushing operation. The upper flushing cock 27 is offset by an angle in the direction of rotation in relation to the lower flushing cock 37. A lower closure element 38 moves in conjunction with the upper flushing cock at the opposite end of a filter candle(s) selected for backflushing. Likewise, an upper closure element is associated with the lower flushing cock. The candles can be reverse-flushed in opposite directions and at different times by the flushing cocks and closure elements. The flushing cocks and closure elements are moved inside annular deflection hoods 60, 70.

Abstract: In a particularly noise-free and vibration-free operating precoated filter for filtering for example cooling lubricating flowing media, a filter candle surrounding a riser channel is mounted by means of a riser tube in a separating plate in an axially moveable manner. A filter cake adhering to the outside of the filter candle is loosened in such a manner that for example a disk-shaped rotary body comprises a shoulder between the track end and the track start along its track. As soon as a head end piece connected to the riser tube and moveable in an axial manner against the force of a spring is released from the rotating track end, the stored force of the spring accelerates the filter candle, so that the filter cake adhering to the filter candles is loosened by the acceleration of the filter candle and the impact pulse when a dampening ring arranged between the filter candle and the separating plate abuts the separating plate.

Abstract: This invention relates to a backflushing filter, particularly for filtering lubricating oil. Filter candles 22 which are open at both ends 24, 34 are disposed around a rotary shaft 1 in the filter housing 11, 12, the interior space of which filter candles can be acted upon in filtration operation by a sludge which flows into the backflushing filter 10. A cleaning device is moved in conjunction by means of the rotary shaft 1, and comprises an upper flushing cock 27 and a lower flushing cock, which communicate with an outflow valve via the rotary shaft 1, for cleaning the filter candles 22′ during a backflushing operation. The upper flushing cock 27 is offset by an angle in the direction of rotation in relation to the lower flushing cock 37.

Abstract: In a particularly noise-free and vibration-free operating precoated filter for filtering for example cooling lubricating means, a filter candle 12 surrounding a riser channel 16 is mounted by means of a riser tube 15 in a separating plate 5 in an axially moveable manner. A filter cake adhering to the outside of the filter candle 12 is loosened in such a manner that for example a disk-shaped rotary body 40 comprises a shoulder 42 between the track end 43 and the track start 44 along its track 41. As soon as a head end piece 20 connected to the riser tube 15 and moveable in an axial manner against the force of a spring 21 is released from the rotating track end 41, the stored force of the spring 21 accelerates the filter candle 12, so that the filter cake adhering to the filter candles is loosened by the acceleration of the filter candle 12 and the impact pulse when a dampening ring arranged between the filter candle 12 and the separating plate 5 abuts the separating plate.