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US 2010/0140157 A1Published application
Liquid filter arrangement and methods
AssigneeDonaldson Company, Inc.
InventorsEnrico Greco, Fabrizio Buratto, Mauro Cantoni, Christian Guernieri, John F. Connelly, John R. Hacker
Life of this patent
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Abstract
A liquid filter arrangement is provided, as well as methods of assembly and use. The liquid filter arrangement includes an anti-drain back valve assembly therein. Advantageous features, relating to a preferred filter cartridge and preferred anti-drain back valve arrangement, are provided.
Claims18
A liquid filter cartridge comprising:
- (a) a region of filter media surrounding and defining a central, open, volume;
- (i) the region of filter media defining first and second ends;
- (b) a first end cap secured to the first end of the region of filter media;
- (i) the first end cap having a central flow aperture therethrough;
- (c) an axial stem positioned on the first end cap and projecting in a direction away from the filter media;
- (i) the axial stem including an outer, annular, seal arrangement thereon;
- (ii) the axial stem defining a plurality of spaced axial projections each having an end remote from the region of filter media;
- (iii) the axial stem including a guide channel arrangement including a guide channel therein:
- positioned between two of the spaced axial projections;
- and, positioned at a location between the seal member and the end of the plurality of spaced projections remote from the region of filter media;
- and,
- (iv) the axial stem having a portion surrounding the flow channel of the first end cap;
- and,
- (d) a second end cap secured to the second end of the region or filter media;
- (i) the second end cap having no central flow aperture therethrough.
12 more elements
A liquid filter assembly including:
- (a) an arrangement comprising:
- (i) a plate arrangement defining an central filtered liquid flow channel;
- (A) the central, filtered liquid flow channel including a flow exit aperture;
- (ii) a lock arrangement comprising a moveable lock member arrangement,
- (b) a releasably mounted filter bowl;
- and,
- (c) a filter cartridge removably positioned within a filter bowl;
- the filter cartridge comprising:
- (i) a region of filter media defining a central, open, volume,
- (A) the region of filter media having first and second ends;
- (ii) a first end cap secured to the first end of the region of filter media;
- (iii) the first end cap including an axial stem thereon defining a central liquid flow conduit therethrough, in liquid flow communication with the central, open, volume defined by the filter media;
- (A) the axial stem including a portion projecting away from the filter media;
- (B) the axial stem including an outer, annular, seal arrangement thereon;
- and
- (C) an end of the axial stem remote from the filter media comprising a tip oriented to bias the moveable lock member arrangement to an unlocked orientation;
- and,
- (iv) a second, closed, end cap secured to the second end of the region of filter media;
15 more elements
An arrangement for use in a liquid filter assembly;
- the arrangement comprising:
- (a) a plate arrangement defining a central, filtered, liquid flow channel;
- (i) the central, filtered, liquid flow channel including a flow exit aperture;
- (c) an anti-drain back valve arrangement including a valve assembly having:
- a valve member;
- and, a biasing member;
- and, having a first, closed, orientation and a second, open, orientation;
- (i) the first closed orientation being an orientation in which the valve member is biased to close the exit aperture of the filtered liquid flow channel by the biasing member;
- (ii) the second, open, orientation being an orientation which results from filtered liquid flow passage, in use, biasing the valve member away from the exit aperture of the filtered liquid flow channel;
- and,
- (iii) the anti-drain back valve arrangement further including a lock arrangement comprising a moveable lock member arrangement having a first locked orientation and a second, unlocked, orientation:
- (A) the lock member arrangement in the first locked orientation, securing the valve member against movement from the closed orientation;
- and
- (B) the lock member arrangement, in the second, unlocked, orientation releasing the valve member to allow movement from the closed orientation;
- and,
- (C) the lock arrangement having an actuator arrangement configured for moving the lock arrangement from the locked orientation to the unlocked orientation upon engagement, within the filter head arrangement, of a filter cartridge properly and operably positioned in the filter assembly, in use.
13 more elements
Dependencies are inferred from the claim text.