US 5,858,231 AGranted

Filter apparatus

OwnerMordeki Droriinventor

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Abstract

A fluid filter comprising a housing defining a fluid inlet and a fluid outlet, a filter element defining an upstream surface communicating with the fluid inlet and a downstream cylindrical surface communicating with the fluid outlet, the filter element comprising a stack of filter disks defining a hollow volume interiorly thereof and a longitudinal axis, and backflushing means for removing filtered out sediment from the filter element comprising an axially displaceable backflushing nozzle assembly disposed within the hollow volume comprising a rotating head coupled to the fluid inlet and having fluid outlet means, arranged to provide a generally radially directed pressurized jet and rotational motion of the rotating head.

Claims13

Dependent claims

A filter comprising:

a housing in communication with an inlet, a drain and an outlet and having an upper aperture;
a filter element disposed in said housing for separating particles from the fluid flowing from said inlet passage through said filter element to said outlet passage and having an external circumferential surface and an internal cylindrical surface defining a hollow internal volume and a central axis, one of said surfaces being in communication with the outlet and the other surface being in communication with the inlet and with the drain;
and
a movable cleaning mechanism comprising a hollow longitudinal means extending through said upper aperture, one end of said longitudinal means being connected to a rotatable, discharge device disposed in said internal volume and having at least one opening for discharging a tangential jet, the other end of said longitudinal means being connected to an external means adapted to communicate with an external pressurized fluid source and with an external source of power such that during a cleaning operation said external source of power effects the linear movement of said rotatable discharge device and simultaneously the pressurized fluid flowing from said external pressurized fluid source discharged from said opening effects the rotational movement of said rotatable discharge device around said central axis within said internal volume.

1 more element

A filter comprising:

a housing having an inlet passage, an outlet passage and an aperture;
a filter element disposed within said housing in order to separate particles from the fluid flowing from said inlet passage through said filter element to said outlet passage said filter element having an external circumferential surface and an internal cylindrical surface defining a hollow internal volume and a central axis interiorly thereof, one of said surfaces being in communication with the inlet passage and the other surface being in communication with the outlet passage;
and
a displaceable discharge mechanism comprising a hollow means extending through said aperture, one end of said hollow means being connected to an external means adapted to communicate with an external source of pressurized fluid and an external source of power, the other end being connected to a rotatable discharge device disposed in said internal volume and having at least one eccentric opening for discharging an eccentric jet;
wherein during a cleaning operation said external power source effects a linear movement of said rotatable discharge device and simultaneously pressurized fluid from said external source of pressurized fluid flowing through said eccentric opening effects the rotation of said rotation of said rotatable discharge device around the central axis.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/660,450Filed 7 Jun 1996 · continuation
Priority: 10 Feb 1987
Granted: 12 Jan 1999
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B01D 25/26
Cell-type filters: cell-type stack filters
B01D 25/30
Filters formed by clamping together several filtering elements or parts of such elements: feeding devices ; Discharge devices
B01D 25/307
Feeding devices ; Discharge devices: with internal recirculation through the filtering element
B01D 25/327
Counter-current flushing, e.g. by air bumps: with backwash shoes, with nozzles

Family

Serial13,248Parent of this continuation · filed 10 Feb 1987
Serial479,057Parent of this continuation · filed 12 Feb 1990
Serial943,132Parent of this continuation · filed 10 Sep 1992
Serial150,582Parent of this continuation · filed 9 Nov 1993
Serial381,014Parent of this continuation · filed 30 Jan 1995
US 5,545,321 AParent of this continuation
US 4,935,126 AParent of this continuation
US 5,858,231 AThis patent

From the US filing history. Foreign family members aren’t listed.

Timeline

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